GB2388393A - Coupling for expandable tubulars - Google Patents
Coupling for expandable tubulars Download PDFInfo
- Publication number
- GB2388393A GB2388393A GB0318547A GB0318547A GB2388393A GB 2388393 A GB2388393 A GB 2388393A GB 0318547 A GB0318547 A GB 0318547A GB 0318547 A GB0318547 A GB 0318547A GB 2388393 A GB2388393 A GB 2388393A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tubular member
- mandrel
- tubular
- coupled
- casing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/10—Setting of casings, screens, liners or the like in wells
- E21B43/103—Setting of casings, screens, liners or the like in wells of expandable casings, screens, liners, or the like
- E21B43/106—Couplings or joints therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/08—Casing joints
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/04—Casing heads; Suspending casings or tubings in well heads
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
- E21B33/14—Methods or devices for cementing, for plugging holes, crevices, or the like for cementing casings into boreholes
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/10—Setting of casings, screens, liners or the like in wells
- E21B43/103—Setting of casings, screens, liners or the like in wells of expandable casings, screens, liners, or the like
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/10—Setting of casings, screens, liners or the like in wells
- E21B43/103—Setting of casings, screens, liners or the like in wells of expandable casings, screens, liners, or the like
- E21B43/105—Expanding tools specially adapted therefor
Abstract
A method of sealing a threaded connection (4500) between pin and box members involves disposing a seal (4525) in an annular groove (4520) defined between the pin and box members and radially expanding the pin and box members to compress the seal (4525).
Description
GB 2388393 A continuation (72) Inventor(s): Robert Lance Cook David Paul
Brisco Bruce R Stewart Lev Ring Richard Carl Haut Robert D Rack Alan B Duell Andrei Gregory Fillipov (74) Agent and/or Address for Service: Haseltine Lake 8 Co Imperial House, 15-19 Kingsway, LONDON, WC2B BUD, United Kingdom
EXPANDABLE CONNECTOR
Background of the Invention
This invention relates generally to expandable connectors and in particular to wellbore casings that are formed using expandable connectors.
5 Conventionally, when a wellbore is created, a number of casings are installed in the borehole to prevent collapse of the borehole wall and to prevent undesired outflow of drilling fluid into the formation or inflow of fluid from the formation into the borehole. The borehole is drilled in intervals whereby a casing which is to be installed in a lower borehole interval is lowered through a previously installed casing of an 10 upper borehole interval. As a consequence of this procedure the casing of the lower interval is of smaller diameter than the casing of the upper interval. Thus, the casings are in a nested arrangement with casing diameters decreasing in downward direction.
Cement annul) are provided between the outer surfaces of the casings and the borehole wall to seal the casings from the borehole wall. As a consequence of this nested 15 arrangement a relatively large borehole diameter is required at the upper part of the wellbore. Such a large borehole diameter involves increased costs due to heavy casing handling equipment, large drill bits and increased volumes of drilling fluid and drill cuttings. Moreover, increased drilling rig time is involved due to required cement pumping, cement hardening, required equipment changes due to large variations in 2 0 hole diameters drilled in the course of the well, and the large volume of cuttings drilled and removed.
Conventionally, at the surface end of the wellbore, a wellhead is formed that typically includes a surface casing, a number of production and/or drilling spools, valving, and a Christmas tree. Typically the wellhead further includes a concentric 2 5 arrangement of casings including a production casing and one or more intermediate casings. The casings are typically supported using load bearing slips positioned above the ground. The conventional design and construction of wellheads is expensive and complex. Conventionally, a wellbore casing cannot be formed during the drilling of a 30 wel]bore. Typically, the wellbore is drilled and then a wellbore casing is formed in the newly drilled section of the wellbore. This delays the completion of a well.
c:\ ( The present invention is directed to overcoming one or more of the limitations of the existing procedures for forming wellbores and wellheads.
Summary of the Invention
According to one aspect of the present invention, a method of forming a 5 wellbore casing is provided that includes installing a tubular liner and a mandrel in the borehole, injecting fluidic material into the borehole, and radially expanding the liner in the borehole by extruding the liner off of the mandrel.
According to another aspect of the present invention, a method of forming a wellbore casing is provided that includes drilling out a new section of the borehole 10 adjacent to the already existing casing. A tubular liner and a mandrel are then placed into the new section of the borehole with the tubular liner overlapping an already existing casing. hardenable fluidic sealing material is injected into an annular region between the tubular liner and the new section of the borehole. The annular region between the tubular liner and the new section of the borehole is then fluidicly isolated 15 from an interior region of the tubular liner below the mandrel. A non hardenable fluidic material is then injected into the interior region of the tubular liner below the mandrel. Phe tubular liner is extruded off of the mandrel. The overlap between the tubular liner and the already existing casing is sealed. The tubular liner is supported by overlap with the already existing casing. The mandrel is removed from the 2 0 borehole. The integrity of the seal of the overlap between the tubular liner and the already existing casing is tested. At least a portion of the second quantity of the hardenable fluidic sealing material is removed from the interior of the tubular liner.
The remaining portions of the fluidic hardenable fluidic sealing material are cured. At least a portion of cured fluidic hrdenable sealing, nnaterial within the tubulm- liner is 2 5 removed.
According to another aspect of the present invention, an apparatus for expanding a tubular member is provided that includes a support member, a mandrel, a tubular member, and a shoe. The support member includes a first fluid passage. The mandrel is coupled to the support member and includes a second fluid passage. The 30 tubular member is coupled to the mandrel. The shoe is coupled to the tubular liner and
! includes a third fluid passage. The first, second and third fluid passages are operably coupled. According to another aspect of the present invention, an apparatus for expanding a tubular member is provided that includes a support member, an 5 expandable mandrel, a tubular member, a shoe, and at least one sealing member. The support member includes a first fluid passage, a second fluid passage, and a flow control valve coupled to the first and second fluid passages. The expandable mandrel is coupled to the support member and includes a third fluid passage. The tubular member is coupled to the mandrel and includes one or more sealing elements. The 10 shoe is coupled to the tubular member and includes a fourth fluid passage. The at least one sealing member is adapted to prevent the entry of foreign material into an interior region of the tubular member.
According to another aspect ofthe present invention, a method of joining a second tubular member to a first tubular member, the first tubular member having an 15 inner diameter greater than an outer diameter of the second tubular member, is provided that includes positioning a mandrel within an interior region of the second tubular member. A portion of an interior region of the second tubular member is pressurized and the second tubular member is extruded off of the mandrel into engagement with the first tubular member.
2 0 According to another aspect of the present invention, a tubular liner is provided that includes an annular member having one or more sealing members at an end portion of the annular member, and one or more pressure relief passages at an end portion of the annular member.
According to another aspect of the present invention, a wellbore casing is 2 5 provided that includes a tubular liner and an annular body of a cured fluidic sealing material. The tubular liner is formed by the process of extruding the tubular liner off of a mandrel.
According to another aspect of the present invention, a tie-back liner for lining an existing wellbore casing is provided that includes a tubular liner and an annular 30 body of cured fluidic sealing material. The tubular liner is formed by the process of
extruding the tubular liner off of a mandrel. The annular body of a cured fluidic sealing material is coupled to the tubular liner.
According to another aspect of the present invention, an apparatus for expanding a tubular member is provided that includes a support member, a mandrel, a 5 tubular member and a shoe. The support member includes a first fluid passage. The mandrel is coupled to the support member. The mandrel includes a second fluid passage operably coupled to the first fluid passage, an interior portion, and an exterior portion. The interior portion of the mandrel is drillable. The tubular member is coupled to the mandrel. The shoe is coupled to the tubular member. The shoe 10 includes a third fluid passage operably coupled to the second fluid passage, an interior portion, and an exterior portion. The interior portion of the shoe is drillable.
According to another aspect of the present invention, a wellhead is provided that includes an ouster casing and a plurality- of concentric inner casings coupled to the outer casing. Each inner casing is supported by contact pressure between an outer 15 surface of the inner casing and an inner surface of the outer casing.
According to another aspect of the present invention, a wellhead is provided that include an outer casing at least partially positioned within a wellbore and a plurality of substantially concentric inner casings coupled to the interior surface of the outer casing. One or more of the inner casings are coupled to the outer casing by 2 0 expanding one or more of the inner casings into contact with at least a portion of the interior surface of the outer casing.
According to another aspect of the present invention, a method of forming a wellhead is provided that includes drilling a wellbore. An outer casing is positioned at least prfia!!y within an upper portion of the wellbore. A first tubular nn.er.ber is 2 5 positioned within the outer casing. At least a portion of the first tubular member is expanded into contact with an interior surface of the outer casing. A second tubular member is positioned within the outer casing and the first tubular member. At least a portion of the second tubular member is expanded into contact with an interior portion of the outer casing.
3 0 According to another aspect of the present invention, an apparatus is provided that includes an outer tubular member, and a plurality of substantially concentric and
o overlapping inner tubular members coupled to the outer tubular member. Each inner tubular member is supported by contact pressure between an outer surface of the inner casing and an inner surface of the outer inner tubular member.
According to another aspect of the present invention, an apparatus is provided 5 that includes an outer tubular member, and a plurality of substantially concentric inner tubular members coupled to the interior surface of the outer tubular member by the process of expanding one or more of the inner tubular members into contact with at least a portion of the interior surface of the outer tubular member.
According to another aspect of the present invention, a wellbore casing is 10 provided that includes a first tubular member, and a second tubular member coupled to the first tubular member in an overlapping relationship. The inner diameter of the first tubular member is substantially equal to the inner diameter of the second tubular member. According to another aspect of the present invention, a wellbore casing is 15 provided that includes a tubular member including at least one thin wall section and a thick wall section, and a compressible annular member coupled to each thin wall section. According to another aspect of the present invention, a method of creating a casing in a borehole located in a subterranean formation is provided that includes 2 0 supporting a tubular liner and a mandrel in the borehole using a support member. A fluidic material is injected into the borehole. An interior region of the mandrel is pressurized. A portion of the mandrel is displaced relative to the support member.
T he tubular liner is expanded.
According to another aspect of the present invention, a wellbore casing is 2 5 provided that includes a first tubular member having a first inside diameter, and a second tubular member having a second inside diameter substantially equal to the first inside diameter coupled to the first tubular member in an overlapping relationship.
The first and second tubular members are coupled by the process of deforming a portion of the second tubular member into contact with a portion of the first tubular 3 0 member
to ( According to another aspect of the present invention, an apparatus for expanding a tubular member is provided that includes a support member including a fluid passage, a mandrel movably coupled to the support member including an expansion cone, at least one pressure chamber defined by and positioned between the 5 support member and mandrel fluidicly coupled to the first fluid passage, and one or more releasable supports coupled to the support member adapted to support the tubular member. According to another aspect of the present invention, an apparatus is provided that includes one or more solid tubular members, each solid tubular member including 10 one or more external seals, one or more slotted tubular members coupled to the solid tubular members, and a shoe coupled to one of the slotted tubular members.
According to another aspect of the present invention, a method of joining a second tubular member to a first tubular member, the first tubular member having an inner diameter greater than an outer diameter of the second tubular member is provided 15 that includes positioning a mandrel within an interior region of the second tubular member. A portion of the interior region of the mandrel is pressurized. I he mandrel is displaced relative to the second tubular member. At least a portion of the second tubular member is extruded off of the mandrel into engagement with the first tubular member. 0 According to another aspect of the present invention, an apparatus is provided that includes one or more primary solid tubulars, each primary solid tubular including one or more external annular seals, n slotted tubulars coupled to the primary solid tubulars, n- 1 intermediate solid tubulars coupled to and interleaved among the slotted tubulars; each intermediate solid tubular including one or snore exiemai annular seals, 2 5 and a shoe coupled to one of the slotted tubulars.
According to another aspect of the present invention, a method of isolating a first subterranean zone from a second subterranean zone in a wellbore is provided that includes positioning one or more primary solid tubulars within the wellbore, the primary solid tubulars traversing the first subterranean zone. One or more slotted 3 0 tubulars are also positioned within the wellbore, the slotted tubulars traversing the second subterranean zone. The slotted tubulars and the solid tubulars are fluidiclv
c ( coupled. The passage of fluids from the first subterranean zone to the second subterranean zone within the wellbore external to the solid and slotted tubulars is prevented. According to another aspect of the present invention, a method of extracting 5 materials from a producing subterranean zone in a wellbore' at least a portion of the wellbore including a casing, is provided that includes positioning one or more primary solid tubulars within the wellbore. The primary solid tubulars with the casing are fluidicly coupled. One or more slotted tubulars are positioned within the wellbore, the slotted tubulars traversing the producing subterranean zone. The slotted tubulars are 10 fluidicly coupled with the solid tubulars. The producing subterranean zone is fluidicly isolated from at least one other subterranean zone within the wellbore. At least one of the slotted tubulars is fluidicly isolated from the producing subterranean zone.
According to another aspect of the present invention, a method of creating a casing in a borehole while also drilling the borehole is also provided that includes 15 installing a tubular liner, a mandrel, and a drilling assembly in the borehole. A fluidic material is injected within the tubular liner, mandrel and drilling assembly. At least a portion of the tubular liner is radially expanded while the borehole is drilled using the drilling assembly. In a preferred embodiment, the injecting includes injecting the fluidic material within an expandable chamber.
2 0 According to another aspect of the present invention, an apparatus is also provided that includes a support member, the support member including a first fluid passage; a mandrel coupled to the support member, the mandrel including: a second fluid passage; a tubular member coupled to the mandrel; and a shoe coupled to the tubular liner, the shoe including a third fluid passage; and a drilling assembly coupled 2 5 to the shoe; wherein the first, second and third fluid passages and the drilling assembly are operably coupled.
According to another aspect of the present invention, a method of forming an underground pipeline within an underground tunnel including at least a first tubular member and a second tubular member, the first tubular member having an inner 3 0 diameter greater than an outer diameter of the second tubular member' is also provided that includes positioning the first tubular member within the tunnel; positioning the
to at second tubular member within the tunnel in an overlapping relationship with the first tubular member; positioning a mandrel and a drilling assembly within an interior region of the second tubular member; injecting a fluidic material within the mandrel, drilling assembly and the second tubular member; extruding at least a portion of the 5 second tubular member off of the mandrel into engagement with the first tubular member; and drilling the tunnel.
According to another aspect of the present invention, an apparatus is also provided that includes a wellbore, the wellbore formed by the process of drilling the wellbore; and a tubular liner positioned within the wellbore, the tubular liner formed 10 by the process of extruding the tubular liner off of a mandrel while drilling the wellbore. In a preferred embodiment, the tubular liner is formed by the process of: placing the tubular liner and mandrel within the wellbore; and pressurizing an interior portion of the tubular liner.
According to another aspect of the present invention, method of forming a 15 wellbore casing in a wellbore is also provided that includes drilling out the wellbore while forming the wellbore casing.
According to another aspect of the present invention, a method of expanding a tubular member is provided that includes placing a mandrel within the tubular member, pressurizing an annular region within the tubular member, and displacing the mandrel 2 0 with respect to the tubular member.
According to another aspect of the present invention, a method of coupling a tubular member to preexisting structure is provided that includes positioning the tubular member in an overlapping relationship to the preexisting structure, placing a mandrel within the tubular member' pressurizing On q"nulal region within the tubular 2 5 member, and displacing the mandrel with respect to the tubular member.
According to another aspect of the present invention, a method of repairing a defect in a preexisting structure using a tubular member is provided that includes positioning the tubular member in an overlapping relationship to the defect in the preexisting structure, placing a mandrel within the tubular member, pressurizing an 3 0 annular region within the tubular member, and displacing the mandrel with respect to the tubular member.
o According to another aspect of the present invention, an apparatus for radially expanding a tubular member is provided that includes a first tubular member, a second tubular member positioned within the first tubular member, a third tubular member movably coupled to and positioned within the second tubular member, a first annular 5 sealing member for sealing an interface between the first and second tubular members, a second annular sealing member for sealing an interface between the second and third tubular members, and a mandrel positioned within the first tubular member and coupled to an end of the third tubular member.
According to another aspect of the present invention, an apparatus is provided 10 that includes a tubular member, a piston adapted to expand the diameter of the tubular member positioned within the tubular member, and an annular chamber defined by the piston and tubular member. The piston includes a passage for conveying fluids out of the tubular member.
According to another aspect of the present invention, a wellbore casing is 15 provided that includes a first tubular member and a second tubular member coupled to the first tubular member. The second tubular member is coupled to the first tubular member by the process of: positioning the second tubular member in an overlapping relationship to the first tubular member, placing a mandrel within the second tubular member, pressurizing an annular region within the second tubular member, and 2 0 displacing the mandrel with respect to the second tubular member.
According to another aspect of the present invention, an apparatus is provided that includes a preexisting structure and a tubular member coupled to the preexisting structure. The tubular member is coupled to the preexisting structure by the process of: positioning the tubular member in an overlapping relationship to the preexisting 2 structure, placing a mandrel within the tubular member, pressurizing an annular region within the tubular member, and displacing the mandrel with respect to the tubular member. According to another aspect of the present invention, an apparatus is provided that includes a preexisting structure having a defective portion and a tubular member 3 0 coupled to the defective portion of the preexisting structure. The tubular member is coupled to the defective portion of the preexisting structure by the process of:
to f positioning the tubular member in an overlapping relationship to the defect in the preexisting structure, placing a mandrel within the tubular member, pressurizing an annular region within the tubular member, and displacing the mandrel with respect to the tubular member.
5 According to another aspect of the present invention, a method of expanding a tubular member is provided that includes placing a mandrel within the tubular member, pressurizing a region within the tubular member; and displacing the mandrel with respect to the tubular member.
According to another aspect of the present invention, a method of coupling a 10 tubular member to preexisting structure has been provided that includes positioning the tubular member in an overlapping relationship to the preexisting structure, placing a mandrel within the tubular member, pressurizing an interior region within the tubular member, and displacing the mandrel with respect to the tubular member.
According to another aspect of the present invention, a method of repairing a 15 defect in a preexisting structure using a tubular member is provided that includes positioning the tubular member in an overlapping relationship to the defect in the preexisting structure, placing a mandrel within the tubular member, pressurizing an interior region within the tubular member, and displacing the mandrel with respect to the tubular member.
2 0 According to another aspect of the present invention, an apparatus for radially expanding a tubular member is provided that includes a first tubular member' a second tubular member coupled to the first tubular member, a third tubular member coupled to the second tubular member, and a mandrel positioned within the second tubular member and coupled to an end portion of the third tubule- member.
2 5 According to another aspect of the present invention, an apparatus is provided that includes a tubular member, a piston adapted to expand the diameter of the tubular member positioned within the tubular member, the piston including a passage for conveying fluids out of the tubular member.
According to another aspect of the present invention, a wellbore casing is 30 provided that includes a first tubular member and a second tubular member coupled to the first tubular member. The second tubular member is coupled to the first tubular 1C
of member by the process of: positioning the second tubular member in an overlapping relationship to the first tubular member, placing a mandrel within the second tubular member, pressurizing an interior region within the second tubular member, and displacing the mandrel levity respect to the second tubular member.
5 According to another aspect of the present invention, an apparatus is provided that includes a preexisting structure and a tubular member coupled to the preexisting structure. The tubular member is coupled to the preexisting structure by the process of: positioning the tubular member in an overlapping relationship to the preexisting structure; placing a mandrel within the tubular member; pressurizing an interior region 10 within the tubular member; and displacing the mandrel with respect to the tubular member. According to another aspect of the present invention, an apparatus is provided that includes a preexisting structure having a defective portion and a tubular member coupled to the defective portion of the preexisting structure. The tubular member is 15 coupled to the defective portion of the preexisting structure by the process of: positioning the tubular member in an overlapping relationship to the defect in the preexisting structure, placing a mandrel within the tubular member, pressurizing an interior region within the tubular member, and displacing the mandrel with respect to the tubular member.
2 0 According to another aspect of the invention, an apparatus is provided that includes a first tubular member, a second tubular member, and a threaded connection for coupling the first tubular member to the second tubular member. The threaded connection includes one or more sealing members for sealing the interface between the first and second tubular members.
2 5 According to another aspect of the present invention, an apparatus is provided that includes a tubular assembly having a first tubular member, a second tubular member, and a threaded connection for coupling the first tubular member to the second tubular member. The threaded connection includes one or more sealing members for sealing the interface between the first and second tubular members. The tubular 30 assembly is formed by the process of radially expanding the tubular assembly.
o According to another aspect of the present invention, an apparatus is provided that includes a tubular member and a mandrel positioned within the tubular member that includes a conical surface have an angle of attack ranging from about l O to 30 degrees. 5 Brief Description of the Drawings
FIG. l is a fragmentary cross-sectional view illustrating the drilling of a new section of a well borehole.
FIG. 2 is a fragmentary cross-sectional view illustrating the placement of an embodiment of an apparatus for creating a casing within the new section of the well 1 0 borehole.
FIG. 3 is a fragmentary cross-sectional view illustrating the injection of a first quantity of a fluidic material into the new section of the well borehole.
FIG. 3a is another fragmentary cross-sectional view illustrating the injection of a first quantity of a hardenablc fluidic sealing material into the new section of the well 1 5 borehole.
FIG. 4 is a fragmentary cross-sectional view illustrating the injection of a second quantity of a fluidic material into the new section of the well borehole.
FIG. is a fragmentary cross-sectional view illustrating the drilling out of a portion of the cured hardenable fluidic sealing material from the new section of the 20 well borehole.
FIG. 6 is a cross-sectional view of an embodiment of the overlapping joint between adjacent tubular members.
FIG. 7 is a fragmentary cross-sectional view of a preferred embodiment of the apparatus for creating a casing within a well borehole.
2 5 FIG. 8 is a fragmentary cross-sectional illustration of the placement of an expanded tubular member within another tubular member.
FIG. 9 is a cross-sectional illustration of a preferred embodiment of an apparatus for forming a casing including a drillable mandrel and shoe.
FIG. 9a is another cross-sectional illustration of the apparatus of FIG. 9.
3 0 FIG. 9b is another cross-sectional illustration of the apparatus of FIG. 9.
FIG. 9c is another cross-sectional illustration of the apparatus of FIG. 9.
C A FIG. lea is a cross-sectional illustration of a wellbore including apair of adjacent overlapping casings.
FIG.I Ob is a cross-sectional illustration of an apparatus and method for creating a tie-back liner using an expandable tubular member.
5 FIG.lOcis a cross-sectional illustration of the pumping of a fluidic sealing material into the annular region between the tubular member and the existing casing.
FIG.lOdis a cross-sectional illustration of the pressurizing of the interior of the tubular member below the mandrel.
FIG.lOe is a cross-sectional illustration of the extrusion of the tubular member 10 off of the mandrel.
FIG.IOfis a cross-sectional illustration of the tie-back liner before drilling out the shoe and packer.
FIG. I Og is a cross-sectional illustration of the completed tie-back liner created using an expandable tubular member.
15 FIG. 1 1 a is a fragmentary cross-sectional view illustrating the drilling of a new section of a well borehole.
FIG. 1 1 b is a fragmentary cross-sectional view illustrating the placement of an embodiment of an apparatus for hanging a tubular liner within the new section of the well borehole.
2 O FIG. 1 1 c is a fragmentary cross-sectional view illustrating the injection of a first quantity of a hardenable fluidic sealing material into the new section of the well borehole. FIG. 1 1 d is a fragmentary cross-sectional view illustrating the introduction of a
wiper dart into the new section of the well borehole.
2 s FIG. 1 1 e is a fragmentary cross-sectional view illustrating the injection of a second quantity of a hardenable fluidic sealing material into the new section of the well borehole.
FIG. 1 I f is a fragmentary cross-sectional view illustrating the completion of the tubular liner.
3 O FIG. 12 is a cross-sectional illustration of a preferred embodiment of a wellhead system utilizing expandable tubular members.
J FIG. 13 is a partial cross-sectional illustration of a preferred embodiment of the wellhead system ofFIG. 12.
FIG. I 4a is an illustration of the formation of an embodiment of a mono diameter wellbore casing.
5 FIG. 14b is another illustration of the formation of the mono-diameter wellbore casing. FIG. 1 4c is another illustration of the formation of the mono-diameter wellbore casmg. FIG. 1 4d is another illustration of the formation of the mono-diameter wellbore 1 0 casing.
FIG. 14e is another illustration of the formation of the mono-diameter wellbore casmg. FIG. 14f is another illustration of the formation of the mono-diameter wellbore casing. 15 FIG. 15 is an illustration of an embodiment of an apparatus for expanding a tubular member.
FIG. 1 5a is another illustration of the apparatus of FIG. 15.
FIG. 1 5b is another illustration of the apparatus of FIG. 15.
FIG. 16 is an illustration of an embodiment of an apparatus for forming a 2 0 mono-diameter wellbore casing.
FIG. 17 is an illustration of an embodiment of an apparatus for expanding a tubular member.
FIG. 1 7a is another illustration of the apparatus of FIG. 16.
FIG. 1 7b is another illustration of the apparatus of FIG. 16.
2 5 FIG. 18 is an illustration of an embodiment of an apparatus for forming a monodiameter wellbore casing.
FIG. 19 is an illustration of another embodiment of an apparatus for expanding a tubular member.
FIG. 19a is another illustration ofthe apparatus of FIG. 17.
3 0 FIG. 1 9b is another illustration of the apparatus of FIG. 17.
o FIG. 20 is an illustration of an embodiment of an apparatus for forming a mono-diameter wellbore casing.
FIG. 2 l is an illustration of the isolation of subterranean zones using expandable tubulars.
5FIG. 22a is a fragmentary cross-sectional illustration of an embodiment of an apparatus for forming a wellbore casing while drilling a wellbore.
FIG. 22b is another fragmentary cross-sectional illustration of the apparatus of FIG.22a. FIG. 22c is another fragmentary cross-sectional illustration of the apparatus of 10FIG. 22a.
FIG. 22d is another fragmentary cross-sectional illustration of the apparatus of FIG. 22a.
FIG. 23a is a fragmentary cross-section illustration of an embodiment of an apparatus and method for expanding tubular members.
15FIG. 23b is another fragmentary cross-sectional illustration of the apparatus of FlG. 23a.
FIG. 23c is another fragmentary cross-sectional illustration of the apparatus of FIG. 23a.
FIG 24a is a fragmentary cross-section illustration of an embodiment of an 20apparatus and method for expanding tubular members.
FIG. 24b is another fragmentary cross-sectional illustration of the apparatus of FIG. 24a.
FIG. 24c is another fragmentary cross-sectional illustration of the apparatus of FIG. 24a.
25FIG. 24d is another fragmentary cross-sectional illustration of the apparatus of FIG. 24a.
FIG. 24e is another fragmentary cross-sectional illustration of the apparatus of FIG. 24a.
FIG. 25 is a partial cross-sectional illustration of an expansion mandrel 30expanding a tubular member.
to - FIG. 26 is a graphical illustration of the relationship between propagation pressure and the angle of attack of the expansion mandrel.
FIG. 27 is a cross-sectional illustration of an embodiment of an expandable connector. FIG. 28 is a cross-sectional illustration of another embodiment of an expandable connector.
FIG. 29 is a cross-sectional illustration of another embodiment of an expandable connector.
FIG. 30 is a cross-sectional illustration of another embodiment of an 10 expandable connector.
Detailed Description of the Illustrative Embodiments
An apparatus and method for forming a wellbore casing within a subterranean formation is provided. The apparatus and method permits a wellbore casing to be formed in a subterranean formation by placing a tubular member and a mandrel in a 15 new section of a wellbore, and then extruding the tubular member off of the mandrel by pressurizing an interior portion of the tubular member. The apparatus and method farther permits adjacent tubular members in the wellbore to be joined using an overlapping joint that prevents fluid and or gas passage. The apparatus and method farther permits a new tubular member to be supported by an existing tubular member 2 0 by expanding the new tubular member into engagement with the existing tubular member. The apparatus and method further minimizes the reduction in the hole size of the wellbore casing necessitated by the addition of new sections of wellbore casing.
An apparatus and method for forming a tie-back liner using an expandable tub! merl,ber is also provided. The apparatus and method permits a tieback liner to 2 5 be created by extruding a tubular member off of a mandrel by pressurizing and interior portion of the tubular member. In this manner, a tie-back liner is produced. The apparatus and method further permits adjacent tubular members in the wellbore to be joined using an overlapping joint that prevents fluid andior gas passage. The apparatus and method further permits a new tubular member to be supported by an existing 3 0 tubular member by expanding the new tubular member into engagement with the existing tubular member.
O r An apparatus and method for expanding a tubular member is also provided that includes an expandable tubular member, mandrel and a shoe. In a preferred embodiment, the interior portions of the apparatus is composed of materials that permit the interior portions to be removed using a conventional drilling apparatus. In this 5 manner, in the event of a malfunction in a downhole region, the apparatus may be easily removed.
An apparatus and method for hanging an expandable tubular liner in a wellbore is also provided. The apparatus and method permit a tubular liner to be attached to an existing section of casing. The apparatus and method further have application to the 10 joining of tubular members in general.
An apparatus and method for forming a wellhead system is also provided. The apparatus and method permit a wellhead to be formed including a number of expandable tubular members positioned in a concentric arrangement. The wellhead preferably includes an outer casing that supports a plurality of concentric casings using 15 contact pressure between the inner casings and the outer casing. l he resulting wellhead system eliminates many of the spools conventionally required, reduces the height of the Christmas tree facilitating servicing, lowers the load bearing areas of the wellhead resulting in a more stable system, and eliminates costly and expensive hanger systems. 2 0 An apparatus and method for forming a mono-diameter well casing is also provided. The apparatus and method permit the creation of a well casing in a wellbore having a substantially constant internal diameter. In this manner, the operation of an oil or gas well is greatly simplified.
An apparatus and method for expanding tubular members is also provided. The 2 5 apparatus and method utilize a piston-cylinder configuration in which a pressurized chamber is used to drive a mandrel to radially expand tubular members. In this mariner, higher operating pressures can be utilized. Throughout the radial expansion process, the tubular member is never placed in direct contact with the operating pressures. In this mariner, damage to the tubular member is prevented while also 3 0 permitting controlled radial expansion of the tubular member in a wellbore.
to - An apparatus and method for forming a mono-diameter wellbore casing is also provided. The apparatus and method utilize a piston-cylinder configuration in which a pressurized chamber is used to drive a mandrel to radially expand tubular members. In this manner, higher operating pressures can be utilized. Throughput the radial 5 expansion process, the tubular member is never placed in direct contact with the operating pressures. In this manner, damage to the tubular member is prevented while also permitting controlled radial expansion of the tubular member in a wellbore.
An apparatus and method for isolating one or more subterranean zones from one or more other subterranean zones is also provided. The apparatus and method 10 permits a producing zone to be isolated from a nonproducing zone using a combination of solid and slotted tubulars. In the production mode, the teachings of the present disclosure may be used in combination with conventional, well known, production
completion equipment and methods using a series of packers, solid tubing, perforated tubing, and sliding sleeves, which will be inserted into the disclosed apparatus to 15 permit the commingling and/or isolation of the subterranean zones from each other.
An apparatus and method for forming a wellbore casing while the wellbore is drilled is also provided. In this manner, a wellbore casing can be formed simultaneous with the drilling out of a new section of the wellbore. In a preferred embodiment, the apparatus and method is used in combination with one or more of the apparatus and 2 0 methods disclosed in the present disclosure for forming wellbore casings using
expandable tubulars. Alternatively, the method and apparatus can be used to create a pipeline or tunnel in a time efficient manner.
An expandable connector is also provided. In a preferred implementation, the expandable connector is used in conjunction with one or more of the disclosed 2 5 embodiments for expanding tubular members. In this manner, the expansion of a plurality of tubular members coupled to one another using the expandable connector is optimized. In several alternative embodiments, the apparatus and methods are used to form or repair wellbore casings, pipelines, and/or structural supports.
3 0 Referring initially to Figs. 1-5' an embodiment of an apparatus and method for fonning a wellbore casing within a subterranean formation will now be described. As
JO illustrated in Fig. 1, a wellbore 100 is positioned in a subterranean formation 105. The wellbore 100 includes an existing cased section 110 having a tubular casing 115 and an annular outer layer of cement 120.
In order to extend the wellbore 100 into the subterranean formation 105, a drill 5 string 125 is used in a well known manner to drill out material from the subterranean formation 105 to form a new section 130.
As illustrated in Fig.2, an apparatus 200 for forming a wellbore casing in a subterranean formation is then positioned in the new section 130 of the wellbore 100.
The apparatus 200 preferably includes an expandable mandrel or pig 205, a tubular 10 member 210, a shoe 215, a lower cup seal 220, an upper cup seal 225, a fluid passage 230, a fluid passage 235, a fluid passage 240, seals 245, and a support member 250.
The expandable mandrel 205 is coupled to and supported by the support member 250. The expandable mandrel 205 is preferably adapted to controllably expand in a radial direction. The expandable mandrel 205 may comprise any number 1 5 of conventional commercially available expandable mandrels modified in accordance with the teachings of the present disclosure. In a preferred embodiment, the
expandable mandrel 205 comprises a hydraulic expansion tool as disclosed in U.S. Patent No.5,348,095, the contents of which are incorporated herein by reference, modified in accordance with the teachings of the present disclosure.
2 0 The tubular member 210 is supported by the expandable mandrel 205. The tubular member 210 is expanded in the radial direction and extruded off of the expandable mandrel 205. The tubular member 210 may be fabricated from any number of conventional commercially available materials such as, for example, Oilfield Country Tubular Goods (OCTG), 13 chromium steel tubinglcasing, or plastic
2 5 tubing/casing. In a preferred embodiment, the tubular member 210 is fabricated from OCTG in order to maximize strength after expansion. The inner and outer diameters ofthe tubular member 210 may range, for example, from approximately 0.75 to 47 inches and 1.05 to 48 inches, respectively. In a preferred embodiment, the inner and outer diameters of the tubular member 210 range from about 3 to 15.5 inches and 3.5 3 0 to 16 inches, respectively in order to optimally provide minimal telescoping effect in
o the most commonly drilled wellbore sizes. The tubular member 210 preferably comprises a solid member.
In a preferred embodiment, the end portion 260 of the tubular member 210 is slotted, perforated, or otherwise modified to catch or slow down the mandrel 205 when 5 it completes the extrusion of tubular member 210. In a preferred embodiment, the length of the tubular member 210 is limited to minimize the possibility of buckling.
For typical tubular member 210 materials, the length of the tubular member 210 is preferably limited to between about 40 to 20,000 feet in length.
The shoe 215 is coupled to the expandable mandrel 205 and the tubular member 1 n 210. The shoe 21 includes fluid passage 240. The shoe 215 may comprise any number of conventional commercially available shoes such as, for example, Super Seal II float shoe, Super Seal 11 Down-Jet float shoe or a guide shoe with a sealing sleeve for a latch down plug modified in accordance with the teachings of the present disclosure. In a preferred embodiment, the shoe 215 comprises an aluminum downjet
15 guide shoe with a sealing sleeve for a latch-down plug available from Halliburton Energy Services in Dallas, TX, modified in accordance with the teachings of the present disclosure, in order to optimally guide the tubular member 210 in the wellbore,
optimally provide an adequate seal between the interior and exterior diameters of the overlapping joint between the tubular members, and to optimally allow the complete 2 0 drill out of the shoe and plug after the completion of the cementing and expansion operations. In a preferred embodiment, the shoe 215 includes one or more through and side outlet ports in fluidic communication with the fluid passage 240. In this manner, the shoe 215 optimally injects hardenable fluidic sealing material into the region outside 2 5 the shoe 215 and tubular member 210. In a preferred embodiment, the shoe 215 includes the fluid passage 240 having an inlet geometry that can receive a dart and or a ball sealing member. In this manner, the fluid passage 240 can be optimally sealed off by introducing a plug, dart andior ball sealing elements into the fluid passage 230.
The lower cup seal 220 is coupled to and supported by the support member 250.
30 The lower cup seal 220 prevents foreign materials from entering the interior region of the tubular member 21(3 adjacent to the expandable mandrel 20. The lower cup seal
o 220 may comprise any number of conventional commercially available cup seals such as, for example, TP cups, or Selective Injection Packer (SIP) cups modified in accordance with the teachings of the present disclosure. In a preferred embodiment,
the lower cup seal 220 comprises a SIP cup seal, available from Halliburton Energy 5 Services in Dallas, TX in order to optimally block foreign material and contain a body of lubricant.
The upper cup seal 225 is coupled to and supported by the support member 250.
The upper cup seal 225 prevents foreign materials from entering the interior region of the tubular member 2 l O. The upper cup seal 225 may comprise any number of 10 conventional commercially available cup seals such as, for example, TP cups or SIP cups modified in accordance with the teachings of the present disclosure. In a
preferred embodiment, the upper cup seal 225 comprises a SIP cup, available from Halliburton Energy Services in Dallas, TX in order to optimally block the entry of foreign materials and contain a body of lubricant.
15 The fluid passage 230 permits fluidic materials to be transported to and from the interior region of the tubular member 2 l 0 below the expandable mandrel 205. The fluid passage 230 is coupled to and positioned within the support member 250 and the expandable mandrel 205. The fluid passage 230 preferably extends from a position adjacent to the surface to the bottom of the expandable mandrel 205. The fluid 20 passage 230 is preferably positioned along a centerline of the apparatus 200.
The fluid passage 230 is preferably selected, in the casing running mode of operation, to transport materials such as drilling mud or formation fluids at flow rates and pressures ranging from about O to 3,000 gallons/minute and 0 to 9000 psi in order to minimize drag on the tubular member being run and to minimize surge pressures 25 exerted on the wellbore which could cause a loss of wellbore fluids and lead to hole collapse. The fluid passage 235 permits fluidic materials to be released from the fluid passage 230. In this manner, during placement of the apparatus 200 within the new section l 30 of the wellbore l DO, fluidic materials 255 forced up the fluid passage 230 30 can be released into the wellbore l DO above the tubular member 2 l O thereby minimizing surge pressures on the vellhore section 130. The fluid passage 235 is
To coupled to and positioned within the support member 250. The fluid passage is further fluidicly coupled to the fluid passage 230.
The fluid passage 235 preferably includes a control valve for controllably opening and closing the fluid passage 235. In a preferred embodiment, the control 5 valve is pressure activated in order to controllably minimize surge pressures. The fluid passage 235 is preferably positioned substantially orthogonal to the centerline of the apparatus 200.
The fluid passage 235 is preferably selected to convey fluidic materials at flow rates and pressures ranging from about O to 3,000 gallons/minute and 0 to 9,000 psi in 10 order to reduce the drag on the apparatus 200 during insertion into the new section 130 of the wellbore 100 and to minimize surge pressures on the new wellbore section 130.
The fluid passage 240 permits fluidic materials to be transported to and from the region exterior to the tubular member 210 and shoe 215. The fluid passage 240 is coupled to and positioned within the shoe 215 in fluidic communication with the 15 interior region of the tubular member 210 below the expandable mandrel 205. The fluid passage 240 preferably has a cross-sectional shape that permits a plug, or other similar device, to be placed in fluid passage 240 to thereby block further passage of fluidic materials. In this manner, the interior region of the tubular member 210 below the expandable mandrel 205 can be fluidicly isolated from the region exterior to the 2 0 tubular member 210. This permits the interior region of the tubular member 210 below the expandable mandrel 205 to be pressurized. The fluid passage 240 is preferably positioned substantially along the centerline of the apparatus 200.
The fluid passage 240 is preferably selected to convey materials such as cement, drilling mud or epoxies at flow rates and pressures ranging from about O to 2 5 3,000 gallons/minute and 0 to 9,000 psi in order to optimally fill the annular region between the tubular member 210 and the new section 130 of the wellbore 100 with fluidic materials. In a preferred embodiment, the fluid passage 240 includes an inlet geometry that can receive a dart and/or a ball sealing member. In this manner, the fluid passage 240 can be sealed off by introducing a plug, dart and/or ball sealing 30 elements into the fluid passage 230.
lo' The seals 245 are coupled to and supported by an end portion 260 of the tubular member 210. The seals 245 are further positioned on an outer surface 265 of the end portion 260 of the tubular member 210. The seals 245 permit the overlapping joint between the end portion 270 of the casing 115 and the portion 260 of the tubular 5 member 210 to be fluidicly sealed. The seals 245 may comprise any number of conventional commercially available seals such as, for example, lead, rubber, Teflon, or epoxy seals modified in accordance with the teachings of the present disclosure. In
a preferred embodiment, the seals 245 are molded from Stratalock epoxy available from Halliburton Energy Services in Dallas, TX in order to optimally provide a load 10 bearing interference fit between the end 260 of the tubular member 210 and the end 270 of the existing casing 115.
In a preferred embodiment, the seals 245 are selected to optimally provide a sufficient frictional force to support the expanded tubular member 210 from the existing casing 115. In a preferred embodiment, the frictional force optimally 15 provided by the seals 245 ranges from about LOON to 1,000,000 lbf in order to optimally support the expanded tubular member 210.
The support member 250 is coupled to the expandable mandrel 205, tubular member 210, shoe 215, and seals 220 and 225. The support member 250 preferably comprises an annular member having sufficient strength to carry the apparatus 200 into 20 the new section 130 of the wellbore 100. In a preferred embodiment, the support member 250 further includes one or more conventional centralizers (not illustrated) to help stabilize the apparatus 200. In a preferred embodiment, the support member 250 comprises coiled tubing.
In a preferred embodiment, a quantity of lubricant 275 is provided in the 25 annular region above the expandable mandrel 205 within the interior of the tubular member 210. In this manner, the extrusion of the tubular member 210 off of the expandable mandrel 205 is facilitated. The lubricant 275 may comprise any number of conventional commercially available lubricants such as, for example, Lubriplate, chlorine based lubricants, oil based lubricants or Climax 1500 Antisieze (3100). In a 30 preferred embodiment, the lubricant 275 comprises Climax 1500 Antisieze (3100)
on available from Climax Lubricants and Equipment Co. in Houston, TX in order to optimally provide optimum lubrication to facilitate the expansion process.
In a preferred embodiment, the support member 250 is thoroughly cleaned prior to assembly to the remaining portions of the apparatus 200. In this manner, the 5 introduction of foreign material into the apparatus 200 is minimized. This minimizes
the possibility of foreign material clogging the various flow passages and valves of the apparatus 200.
In a preferred embodiment, before or after positioning the apparatus 200 within the new section 130 ofthe wellbore 100, a couple of wellbore volumes are circulated 10 in order to ensure that no foreign materials are located within the wellbore 100 that might clog up the various flow passages and valves of the apparatus 200 and to ensure that no foreign material interferes with the expansion process.
As illustrated in Fig.3, the fluid passage 235 is then closed and a hardenable fluidic sealing material 305 is then pumped from a surface location into the fluid 15 passage 230. The material 305 then passes from the fluid passage 230 into the interior region 310 of the tubular member 21 i) below the expandable mandrel 205. The material 305 then passes from the interior region 310 into the fluid passage 240. The material 305 then exits the apparatus 200 and fills the annular region 315 between the exterior of the tubular member 210 and the interior wall of the new section 130 of the 2 0 wellbore 100. Continued pumping of the material 305 causes the material 30S to fill up at least a portion of the annular region 315.
The material 305 is preferably pumped into the annular region 315 at pressures and flow rates ranging, for example, from about O to SOOO psi arid O to 1,500 sallons/min7 respectively. The optimum flow rate and operating pressures vary as a 25 function of the casing and wellbore sizes, wellbore section length, available pumping equipment, and fluid properties of the fluidic material being pumped. The optimum flow rate and operating pressure are preferably determined using conventional empirical methods.
The hardenable fluidic sealing material 305 may comprise any number of 30 conventional commercially available hardenable fluidic sealing materials such as, for example, slag mix, cement or epoxy. In a preferred embodiment, the hardenable
Am C fluidic sealing material 305 comprises a blended cement prepared specifically for the particular well section being drilled from Halliburton Energy Services in Dallas, TX in order to provide optimal support for tubular member 210 while also maintaining optimum flow characteristics so as to minimize difficulties during the displacement of 5 cement in the annular region 315. The optimum blend of the blended cement is preferably determined using conventional empirical methods.
The annular region 315 preferably is filled with the material 305 in sufficient quantities to ensure that, upon radial expansion of the tubular member 210, the annular region 315 of the new section 130 of the wellbore 100 will be filled with material 305.
10 In a particularly preferred embodiment, as illustrated in Fig. 3a, the wall thickness and/or the outer diameter of the tubular member 210 is reduced in the region adjacent to the mandrel 205 in order optimally permit placement of the apparatus 200 in positions in the wellbore with tight clearances. Furthermore, in this manner, the initiation of the radial expansion of the tubular member 210 during the extrusion 15 process is optimally facilitated.
As illustrated in Fig. 4, once the annular region 315 has been adequately filled with material 305, a plug 405, or other similar device, is introduced into the fluid passage 240 thereby fluidicly isolating the interior region 310 from the annular region 315. In a preferred embodiment, a non-hardenable lluidic material 306 is then pumped 2 0 into the interior region 310 causing the interior region to pressurize. In this manner, the interior of the expanded tubular member 210 will not contain significant amounts of cured material 305. This reduces and simplifies the cost of the entire process.
Alternatively, the material 305 may be used during this phase of the process. Once the interior region 310 becomes sufficiently pressurized,the tubular member 210 is 2 5 extruded off of the expandable mandrel 205. During the extrusion process, the expandable mandrel 205 may be raised out of the expanded portion of the tubular member 210. In a preferred embodiment, during the extrusion process, the mandrel 205 is raised at approximately the same rate as the tubular member 210 is expanded in order to keep the tubular member 210 stationary relative to the new wellbore section 30 130. In an alternative preferred embodiment, the extrusion process is commenced with the tubular member 210 positioned above the bottom of the new wellbore section 130,
on keeping the mandrel 205 stationary, and allowing the tubular member 210 to extrude off of the mandrel 20S and fall down the new wellbore section 130 under the force of gravity The plug 405 is preferably placed into the fluid passage 240 by introducing the 5 plug 405 into the fluid passage 230 at a surface location in a conventional manner.
The plug 405 preferably acts to fluidicly isolate the hardenable fluidic sealing material 305 from the non hardenable fluidic material 306.
The plug 405 may comprise any number of conventional commercially available devices from plugging a fluid passage such as, for example, Multiple Stage 10 Cementer (MSC) latch-down plug, Omega latch-down plug or three-wiper latch-down plug modified in accordance with the teachings of the present disclosure. In a
preferred embodiment, the plug 405 comprises a MSC latch-down plug available from Halliburton Energy Services in Dallas, TX.
After placement of the plug 405 in the fluid passage 240, a non hardenable 15 fluidic material 306 is preferably pumped into the interior region 310 at pressures and flow rates ranging, for example, from approximately 400 to 10,000 psi and 30 to 4,000 gallons/mint In this manner, the amount of hardenable fluidic sealing material within the interior 310 of the tubular member 210 is minimized. In a preferred embodiment, after placement of the plug 405 in the fluid passage 240, the non hardenable material 2 Q 306 is preferably pumped into the interior region 310 at pressures and flow rates ranging from approximately 500 to 9,000 psi and 40 to 3,000 gallons/min in order to maximize the extrusion speed.
In a preferred embodiment, the apparatus 200 is adapted to minimize tensile, burst, and friction effects upon the tubu!ar m-ember 21 n during the expansion process.
5 These effects will depend upon the geometry of the expansion mandrel 205, the material composition of the tubular member 210 and expansion mandrel 205, the inner diameter of the tubular member 210, the wall thickness of the tubular member 210, the type of lubricant, and the yield strength of the tubular member 210. In general, the thicker the wall thickness, the smaller the inner diameter, and the greater the yield 3 0 strength of the tubular member 210, then the greater the operating pressures required to extrude the tubular member 210 off of the mandrel 205.
o For typical tubular members 210, the extrusion of the tubular member 210 off of the expandable mandrel will begin when the pressure of the interior region 310 reaches, for example, approximately 500 to 9,000 psi.
During the extrusion process, the expandable mandrel 205 may be raised out of 5 the expanded portion of the tubular member 210 at rates ranging, for example, from about O to 5 ftlsec. In a preferred embodiment, during the extrusion process, the expandable mandrel 205 is raised out of the expanded portion of the tubular member 210 at rates ranging from about 0 to 2 fVsec in order to minimize the time required for the expansion process while also permitting easy control of the expansion process.
10 When the end portion 260 of the tubular member 210 is extruded off of the expandable mandrel 205, the outer surface 265 of the end portion 260 of the tubular member 210 will preferably contact the interior surface 410 of the end portion 270 of the casing 115 to form an fluid tight overlapping joint. The contact pressure of the overlapping joint may range, for example, from approximately 50 to 20000 psi. In a 15 preferred embodiment, the contact pressure of the overlapping joint ranges from approximately 400 to l O,OOO psi in order to provide optimum pressure to activate the annular sealing members 245 and optimally provide resistance to axial motion to accommodate typical tensile and compressive loads.
The overlapping joint between the section 410 of the existing casing 115 and 2 0 the section 265 of the expanded tubular member 210 preferably provides a gaseous and fluidic seal. In a particularly preferred embodiment, the sealing members 245 optimally provide a fluidic and gaseous seal in the overlapping joint.
In a preferred embodiment, the operating pressure and flow rate of the non hardenable fluidic material 306 is controllably ramped down when the expandable 2 5 mandrel 205 reaches the end portion 260 of the tubular member 210. In this manner, the sudden release of pressure caused by the complete extrusion of the tubular member 210 off of the expandable mandrel 205 can be minimized. In a preferred embodiment, the operating pressure is reduced in a substantially linear fashion from 100% to about 10% during the end of the extrusion process beginning when the mandrel 205 is within 30 about 5 feet from completion of the extrusion process.
2 l
c UT 7 A, A, A -. _
Alternatively, or in combination, a shock absorber is provided in the support member 250 in order to absorb the shock caused by the sudden release of pressure.
The shock absorber may comprise, for example, any conventional commercially available shock absorber adapted for use in wellbore operations.
5 Alternatively, or in combination, a mandrel catching structure is provided in the end portion 260 of the tubular member 2 l 0 in order to catch or at least decelerate the mandrel 205.
Once the extrusion process is completed, the expandable mandrel 205 is removed from the wellbore 100. In a preferred embodiment, either before or after the 10 removal of the expandable mandrel 205, the integrity of the fluidic seal of the overlapping joint between the upper portion 260 of the tubular member 2 l 0 and the lower portion 270 of the casing 115 is tested using conventional methods.
If the fluidic seal of the overlapping joint between the upper portion 260 of the tubular member 2 l 0 and the lower portion 270 of the casing 1 15 is satisfactory, then 15 any uncured portion of the material 305 within the expanded tubular member 2 l 0 is then removed in a conventional manner such as, for example, circulating the uncured material out of the interior of the expanded tubular member 210. The mandrel 205 is then pulled out of the wellbore section 130 and a drill bit or mill is used in combination with a conventional drilling assembly 505 to drill out any hardened material 305 within 2 0 the tubular member 210. The material 305 within the annular region 3 l 5 is then allowed to cure.
As illustrated in l:;ig. 5, preferably any remaining cured material 305 within the interior of the expanded tubular member 210 is then removed in a conventional manner using a conventional dri!! string 505. The resulting new section of casing 5iu includes 2 5 the expanded tubular member 210 and an outer annular layer 515 of cured material 305. The bottom portion ofthe apparatus 200 comprising the shoe 215 and dart 405 may then be removed by drilling out the shoe 215 and dart 405 using conventional drilling methods.
In a preferred embodiment, as illustrated in Fig. 6, the upper portion 260 of the 3 0 tubular member 2 l 0 includes one or more sealing members 605 and one or more pressure relief holes 610. In this manner, the overlapping joint between the lower
on i portion 270 of the casing 1 I 5 and the upper portion 260 of the tubular member 210 is pressure-tight and the pressure on the interior and exterior surfaces of the tubular member 210 is equalized during the extrusion process.
In a preferred embodiment, the sealing members 605 are seated within recesses 5 6 I 5 formed in the outer surface 265 of the upper portion 260 of the tubular member 210. In an alternative preferred embodiment, the sealing members 605 are bonded or molded onto the outer surface 265 of the upper portion 260 of the tubular member 210.
The pressure relief holes 610 are preferably positioned in the last few feet of the tubular member 210. The pressure relief holes reduce the operating pressures required 1 0 to expand the upper portion 260 of the tubular member 210. This reduction in required operating pressure in turn reduces the velocity of the mandrel 205 upon the completion of the extrusion process. This reduction in velocity in turn minimizes the mechanical shock to the entire apparatus 200 upon the completion of the extrusion process.
Referring now to Fig. 7, a particularly preferred embodiment of an apparatus 15 700 for forming a casing within a wellbore preferably includes an expandable mandrel or pig 705, an expandable mandrel or pig container 710, a tubular member 715, a float shoe 720, a lower cup seal 725, an upper cup seal 730, a fluid passage 735, a fluid passage 740, a support member 745, a body of lubricant 750, an overshot connection 755, another support member 760, and a stabilizer 765.
20 The expandable mandrel 705 is coupled to and supported by the support member 745. The expandable mandrel 705 is further coupled to the expandable mandrel container 710. The expandable mandrel 705 is preferably adapted to controllably expand in a radial direction. The expandable mandrel 705 may comprise any number of conventional commercially available expandable mandrels modified in 2 5 accordance with the teachings of the present disclosure. In a preferred embodiment,
the expandable mandrel 705 comprises a hydraulic expansion tool substantially as disclosed in U.S. Pat. No. 5,348,095, the contents of which are incorporated herein by reference, modified in accordance with the teachings of the present disclosure.
The expandable mandrel container 710 is coupled to and supported by the 30 support member 745. The expandable mandrel container 710 is further coupled to the expandable mandrel 705. The expandable mandrel container 710 maid be constructed
cow from any number of conventional commercially available materials such as, for example, Oilfield Country Tubular Goods, stainless steel, titanium or high strength
steels. In a preferred embodiment, the expandable mandrel container 710 is fabricated from material having a greater strength than the material from which the tubular 5 member 715 is fabricated. In this manner, the container 710 can be fabricated from a tubular material having a thinner wall thickness than the tubular member 210. This permits the container 710 to pass through tight clearances thereby facilitating its placement within the wellbore.
In a preferred embodiment, once the expansion process begins, and the thicker, 10 lower strength material of the tubular member 715 is expanded, the outside diameter of the tubular member 715 is greater than the outside diameter of the container 710.
The tubular member 715 is coupled to and supported by the expandable mandrel 705 The tubular member 715 is preferably expanded in the radial direction and extruded off of the expandable mandrel 705 substantially as described above with 15 reference to Figs. 1-6. T he tubular member 715 may be fabricated from any number of materials such as, for example, Oil field Country Tubular Goods (OCTG), automotive
grade steel or plastics. In a preferred embodiment, the tubular member 715 is fabricated from OCTG.
In a preferred embodiment, the tubular member 715 has a substantially annular 20 cross-section. In a particularly preferred embodiment, the tubular member 715 has a substantially circular annular cross-section.
The tubular member 715 preferably includes an upper section 805, an intermediate section 810, and a lower section 815. The upper section 805 of the tubular member 715 preferably is defined by the region beginning in the vicinity ofthe 2 5 mandrel container 710 and ending with the top section 820 of the tubular member 715.
The intermediate section 810 of the tubular member 715 is preferably defined by the region beginning in the vicinity of the top of the mandrel container 710 and ending with the region in the vicinity of the mandrel 705. The lower section of the tubular member 715 is preferably defined by the region beginning in the vicinity of the 3 0 mandrel 705 and ending at the bottom 825 of the tubular member 715.
o In a preferred embodiment, the wall thickness of the upper section 805 of the tubular member 715 is greater than the wall thicknesses of the intermediate and lower sections 8IO and 815 of the tubular member 715 in order to optimally facilitate the initiation of the extrusion process and optimally permit the apparatus 700 to be 5 positioned in locations in the wellbore having tight clearances.
The outer diameter and wall thickness of the upper section 805 of the tubular member 715 may range, for example, from about 1.05 to 48 inches and 1/8 to 2 inches, respectively. In a preferred embodiment, the outer diameter and wall thickness of the upper section 805 of the tubular member 7 I 5 range from about 3.5 to 16 inches and 3/8 10 to 1.5 inches, respectively.
The outer diameter and wall thickness of the intermediate section 810 of the tubular member 715 may range, for example, from about 2.5 to 50 inches and 1/16 to I.5 inches, respectively. In a preferred embodiment, the outer diameter and wall thickness of the intermediate section 810 of the tubular member 715 range from about 15 3.5 to 19 inches and 1/8 to 1. 25 inches, respectively.
The outer diameter and wall thickness of the lower section 815 of the tubular member 715 may range, for example, from about 2.5 to 50 inches and 1/16 to 1.25 inches, respectively. In a preferred embodiment, the outer diameter and wall thickness of the lower section 810 of the tubular member 7 I 5 range from about 3.5 to I 9 inches 2 0 and I/8 to 1.25 inches, respectively. In a particularly preferred embodiment, the wall thickness of the lower section 815 of the tubular member 715 is further increased to increase the strength of the shoe 720 when drillable materials such as, for example, aluminum are used.
The tubular member 715 preferably comprises a solid tubular member. In a 2 5 preferred embodiment, the end portion 820 of the tubular member 715 is slotted, perforated, or otherwise modified to catch or slow down the mandrel 705 when it completes the extrusion of tubular member 715. In a preferred embodiment, the length of the tubular member 715 is limited to minimize the possibility of buckling. For typical tubular member 715 materials, the length of the tubular member 715 is 3 0 preferably limited to between about 40 to 20,000 feet in length.
The shoe 720 is coupled to the expandable mandrel 705 and the tubular member 715. The shoe 720 includes the fluid passage 740. In a preferred embodiment, the shoe 720 further includes an inlet passage 830, and one or more jet ports 835. In a particularly preferred embodiment, the crosssectional shape of the inlet passage 830 is 5 adapted to receive a latchdown dart, or other similar elements, for blocking the inlet passage 830. The interior of the shoe 720 preferably includes a body of solid material 840 for increasing the strength of the shoe 720. In a particularly preferred embodiment, the body of solid material 840 comprises aluminum.
The shoe 720 may comprise any number of conventional commercially 10 available shoes such as, for example, Super Seal II Down-Jet float shoe, or guide shoe with a sealing sleeve for a latch down plug modified in accordance with the teachings of the present disclosure. In a preferred embodiment, the shoe 720 comprises an
aluminum downjet guide shoe with a sealing sleeve for a latch-down plug available from Halliburton Energy Services in Dallas, TX, modified in accordance with the 15 teachings of the present disclosure, in order to optimize guiding the tubular member
715 in the wellbore, optimize the seal between the tubular member 715 and an existing wellbore casing, and to optimally facilitate the removal of the shoe 720 by drilling it out after completion of the extrusion process.
The lower cup seal 725 is coupled to and supported by the support member 745.
2 0 The lower cup seal 725 prevents foreign materials from entering the interior region of the tubular member 715 above the expandable mandrel 705. The lower cup seal 725 may comprise any number of conventional commercially available cup seals such as, for example, TP cups or Selective Injection Packer (SIP) cups modified in accordance with the teachings of the present disclosure. In a prefer' ed embodiment, the lower cup
2 5 seal 725 comprises a SIP cup, available from Halliburton Energy Services in Dallas, TX in order to optimally provide a debris barrier and hold a body of lubricant.
The upper cup seal 730 is coupled to and supported by the support member 760.
The upper cup seal 730 prevents foreign materials from entering the interior region of the tubular member 715. The upper cup seal 730 may comprise any number of 3 0 conventional commercially available cup seals such as, for example, TP cups or Selective Injection Packer (SIP) cup modified in accordance with the teachings of the
- ! present disclosure. In a preferred embodiment, the upper cup seal 730 comprises a SIP
cup available from Halliburton Energy Services in Dallas, TX in order to optimally provide a debris barrier and contain a body of lubricant.
The fluid passage 735 permits fluidic materials to be transported to and from 5 the interior region of the tubular member 715 below the expandable mandrel 705. The fluid passage 735 is fluidicly coupled to the fluid passage 740. The fluid passage 735 is preferably coupled to and positioned within the support member 760, the support member 745, the mandrel container 710, and the expandable mandrel 705. The fluid passage 735 preferably extends from a position adjacent to the surface to the bottom of 10 the expandable mandrel 705. The fluid passage 735 is preferably positioned along a centerline of the apparatus 700. The fluid passage 735 is preferably selected to transport materials such as cement, drilling mud or epoxies at flow rates and pressures ranging from about 40 to 3,000 gallons/minute and 500 to 9,000 psi in order to optimally provide sufficient operating pressures to extrude the tubular member 715 off 15 of the expandable mandrel 705.
As described above with reference to Figs. 1-6, during placement of the apparatus 700 within a new section of a wellbore, fluidic materials forced up the fluid passage 735 can be released into the wellbore above the tubular member 715. In a preferred embodiment, the apparatus 700 further includes a pressure release passage 2 0 that is coupled to and positioned within the support member 260. The pressure release passage is further fluidicly coupled to the fluid passage 735. The pressure release passage preferably includes a control valve for controllably opening and closing the fluid passage. In a preferred embodiment, the control valve is pressure activated in order to controllably minimize surge pressures. The pressure release passage is 2 5 preferably positioned substantially orthogonal to the centerline of the apparatus 700.
The pressure release passage is preferably selected to convey materials such as cement, drilling mud or epoxies at flow rates and pressures ranging from about O to 500 gallons/minute and O to 1,000 psi in order to reduce the drag on the apparatus 700 during insertion into a new section of a wellbore and to minimize surge pressures on 30 the new wellbore section.
C, A The fluid passage 740 permits fluidic materials to be transported to and from the region exterior to the tubular member 715. The fluid passage 740 is preferably coupled to and positioned within the shoe 720 in fluidic communication with the interior region ofthe tubular member 715 below the expandable mandrel 705. The 5 fluid passage 740 preferably has a cross-sectional shape that permits a plug, or other similar device, to be placed in the inlet 830 of the fluid passage 740 to thereby block further passage of fluidic materials. In this manner, the interior region of the tubular member 715 below the expandable mandrel 705 can be optimally fluidicly isolated from the region exterior to the tubular member 715 This permits the interior region of 10 the tubular member 71 below the expandable mandrel 205 to be pressurized.
The fluid passage 740 is preferably positioned substantially along the centerline of the apparatus 700. The fluid passage 740 is preferably selected to convey materials such as cement, drilling mud or epoxies at flow rates and pressures ranging from about O to 3000 gallons/minute and 0 to 9,000 psi in order to optimally fill an annular region 15 between the tubular member 715 and a new section of a wellbore with fluidic materials. In a preferred embodiment, the fluid passage 740 includes an inlet passage 830 having a geometry that can receive a dart and/or a ball sealing member. In this manner, the fluid passage 240 can be sealed off by introducing a plug, dart and/or ball sealing elements into the fluid passage 230.
2 0 In a preferred embodiment, the apparatus 700 further includes one or more seals 845 coupled to and supported by the end portion 820 of the tubular member 715. The seals 845 are farther positioned on an outer surface of the end portion 820 of the tubular member 715. The seals 845 permit the overlapping joint between an end portion of preexisting easing and the end potion 820 of the tubular n-e-nloer 7 i 5 to be 2 5 fluidicly sealed. The seals 845 may comprise any number of conventional commercially available seals such as, for example, lead, rubber, Teflon, or epoxy seals modified in accordance with the teachings of the present disclosure In a preferred
embodiment, the seals 845 comprise seals molded from StrataLock epoxy available from Halliburton Energy Services in Dallas, TX in order to optimally provide a 30 hydraulic seal and a load bearing interference fit in the overlapping joint between the
* c) tubular member 715 and an existing casing with optimal load bearing capacity to support the tubular member 715.
In a preferred embodiment, the seals 845 are selected to provide a sufficient frictional force to support the expanded tubular member 715 from the existing casing.
5 In a preferred embodiment, the frictional force provided by the seals 845 ranges from about 1000 to l,OOO,OOO Ibf in order to optimally support the expanded tubular member 71S.
The support member 745 is preferably coupled to the expandable mandrel 705 and the overshot connection 755. The support member 745 preferably comprises an 10 annular member having sufficient strength to carry the apparatus 700 into a new section of a wellbore. The support member 745 may comprise any number of conventional commercially available support members such as, for example, steel drill pipe, coiled tubing or other high strength tubular modified in accordance with the teachings of the present disclosure. In a preferred embodiment, the support member
15 745 comprises conventional drill pipe available from various steel mills in the United States. In a preferred embodiment, a body of lubricant 750 is provided in the annular region above the expandable mandrel container 710 within the interior of the tubular member 7 l 5. In this manner, the extrusion of the tubular member 715 off of the 20 expandable mandrel 705 is facilitated. The lubricant 705 may comprise any number of conventional commercially available lubricants such as, for example, Lubriplate, chlorine based lubricants, oil based lubricants, or Climax 1500 Antisieze (3100). In a preferred embodiment, the lubricant 750 comprises Climax 1500 Antisieze (3100) available from Halliburton Energy Services in Houston, TX in order to optimally 2 5 provide lubrication to facilitate the extrusion process.
The overshot connection 755 is coupled to the support member 745 and the support member 760. The overshot connection 755 preferably permits the support member 745 to be removably coupled to the support member 760. The overshot connection 755 may comprise any number of conventional commercially available 3 0 overshot connections such as, for example, Innerstring Sealing Adapter, Innerstring Flat-Face Sealing Adapter or EZ Drill Setting Tool Stinger. In a preferred
c:- embodiment, the overshot connection 755 comprises a Innerstring Adapter with an Upper Guide available from Halliburton Energy Services in Dallas, TX.
The support member 760 is preferably coupled to the overshot connection 755 and a surface support structure (not illustrated). The support member 760 preferably 5 comprises an annular member having sufficient strength to carry the apparatus 700 into a new section of a wellbore. The support member 760 may comprise any number of conventional commercially available support members such as, for example, steel drill pipe, coiled tubing or other high strength tubulars modified in accordance with the teachings of the present disclosure. In a preferred embodiment, the support member
10 760 comprises a conventional drill pipe available from steel mills in the United States.
The stabilizer 765 is preferably coupled to the support member 760. The stabilizer 765 also preferably stabilizes the components of the apparatus 700 within the tubular member 715. The stabilizer 765 preferably comprises a spherical member having an outside diameter that is about 80 to 99% of the interior diameter of the 15 tubular member 715 in order to optimally minimize buckling of the tubular member 715. The stabilizer 765 may comprise any number of conventional commercially available stabilizers such as, for example, EZ Drill Star Guides, packer shoes or drag blocks modified in accordance with the teachings of the present disclosure. In a
preferred embodiment, the stabilizer 765 comprises a sealing adapter upper guide 2 0 available from Halliburton Energy Services in Dallas, TX.
In a preferred embodiment, the support members 745 and 760 are thoroughly cleaned prior to assembly to the remaining portions of the apparatus 700. In this manner, the introduction of foreign material into the apparatus 700 is minimized. This
minimizes the possibility of foreign material clogging the various flow passages and 2 5 valves of the apparatus 700.
In a preferred embodiment, before or after positioning the apparatus 700 within a new section of a wellbore, a couple of wellbore volumes are circulated through the various flow passages of the apparatus 700 in order to ensure that no foreign materials are located within the wellbore that might clog up the various flow passages and valves 3 0 of the apparatus 700 and to ensure that no foreign material interferes with the expansion mandrel 705 during the expansion process.
In a preferred embodiment, the apparatus 700 is operated substantially as described above with reference to Figs. 1-7 to form a new section of casing within a wellbore. As illustrated in Fig. 8, in an alternative preferred embodiment, the method and 5 apparatus described herein is used to repair an existing wellbore casing 805 by forming a tubular liner 810 inside of the existing wellbore casing 805. In a preferred embodiment, an outer annular lining of cement is not provided in the repaired section.
In the alternative preferred embodiment, any number of fluidic materials can be used to expand the tubular liner 810 into intimate contact with the damaged section of the 10 wellbore casing such as, for example, cement, epoxy, slag mix, or drilling mud. In the alternative preferred embodiment, sealing members 815 are preferably provided at both ends of the tubular member in order to optimally provide a fluidic seal. In an alternative preferred embodiment, the tubular liner 810 is formed within a horizontally positioned pipeline section, such as those used to transporthydrocarbons or water, with 15 the tubular liner 810 placed in an overlapping relationship with the adjacent pipeline section. In this manner, underground pipelines can be repaired without having to dig out and replace the damaged sections.
In another alternative preferred embodiment, the method and apparatus described herein is used to directly line a wellbore with a tubular liner 810. In a 2 0 preferred embodiment, an outer annular lining of cement is not provided between the tubular liner 810 and the wellbore. In the alternative preferred embodiment, any number of fluidic materials can be used to expand the tubular liner 810 into intimate contact with the wellbore such as, for example, cement, epoxy, slag mix, or drilling mud. 2 5 Referring now to Figs. 9, 9a, 9b and 9c, a preferred embodiment of an apparatus 900 for forming a wellbore casing includes an expandable tubular member 902, a support member 904, an expandable mandrel or pig 906, and a shoe 908. In a preferred embodiment, the design and construction of the mandrel 906 and shoe 908 permits easy removal of those elements by drilling them out. In this manner, the 30 assembly 900 can be easily removed from a wellbore using a conventional drilling apparatus and corresponding drilling methods.
c The expandable tubular member 902 preferably includes an upper portion 910, an intermediate portion 912 and a lower portion 914. During operation of the apparatus 900, the tubular member 902 is preferably extruded off of the mandrel 906 by pressurizing an interior region 966 of the tubular member 902. The tubular member 5 902 preferably has a substantially annular cross-section.
In a particularly preferred embodiment, an expandable tubular member 915 is coupled to the upper portion 910 of the expandable tubular member 902. During operation of the apparatus 900, the tubular member 915 is preferably extruded off of the mandrel 906 by pressurizing the interior region 966 of the tubular member 902.
10 The tubular member 915 preferably has a substantially annular crosssection. In a preferred embodiment, the wall thickness of the tubular member 915 is greater than the wall thickness of the tubular member 902.
The tubular member 915 may be fabricated from any number of conventional commercially available materials such as, for example, oilfield tubulars, low alloy
15 steels? titanium or stainless steels. In a preferred embodiment, the tubular member 915 is fabricated from oilfield tubulars in order to optimally provide approximately the
same mechanical properties as the tubular member 902. In a particularly preferred embodiment, the tubular member 915 has a plastic yield point ranging from about 40,000 to 135,000 psi in order to optimally provide approximately the same yield 2 0 properties as the tubular member 902. The tubular member 915 may comprise a plurality of tubular members coupled end to end.
In a preferred embodiment, the upper end portion of the tubular member 915 includes one or more sealing members for optimally providing a Iluidic and/or gaseous seal with an existing section of wellbore casing 2 5 In a preferred embodiment, the combined length of the tubular members 902 and 915 are limited to minimize the possibility of buckling. For typical tubular member materials, the combined length of the tubular members 902 and 915 are limited to between about 40 to 20,000 feet in length.
The lower portion 914 of the tubular member 902 is preferably coupled to the 3 0 shoe 908 by a threaded connection 968. The intermediate portion 912 of the tubular member 902 preferably is placed in intimate sliding contact w ith the mandrel 906.
c41 The tubular member 902 may be fabricated from any number of conventional commercially available materials such as, for example, oiIfield tubulars, low alloy
steels, titanium or stainless steels. In a preferred embodiment, the tubular member 902 is fabricated from oilfield tubulars in order to optimally provide approximately the
5 same mechanical properties as the tubular member 915. In a particularly preferred embodiment, the tubular member 902 has a plastic yield point ranging from about 40,000 to 135,000 psi in order to optimally provide approximately the same yield properties as the tubular member 915.
The wall thickness of the upper, intermediate, and lower portions, 910, 912 and l 0 914 of the tubular member 902 may range, for example, from about l/16 to 1.5 inches.
In a preferred embodiment, the wall thickness of the upper, intermediate, and lower portions, 910, 912 and 914 of the tubular member 902 range from about l/8 to 1.25 in order to optimally provide wall thickness that are about the same as the tubular member 915. In a preferred embodiment, the wall thickness of the lower portion 914 15 is less than or equal to the wall thickness of the upper portion 910 in order to optimally provide a geometry that will fit into tight clearances downhole.
The outer diameter of the upper, intermediate, and lower portions, 910, 912 and 914 of the tubular member 902 may range, for example, from about 1.05 to 48 inches.
In a preferred embodiment, the outer diameter of the upper, intermediate, and lower 2 0 portions, 910, 912 and 914 of the tubular member 902 range from about 3 i/: to 19 inches in order to optimally provide the ability to expand the most commonly used oilfield tubulars.
The length of the tubular member 902 is preferably limited to between about 2 to 5 feet in order to optimally provide enough length to contain the mandrel 906 and a 2 5 body of lubricant.
The tubular member 902 may comprise any number of conventional commercially available tubular members modified in accordance with the teachings of the present disclosure. In a preferred embodiment, the tubular member 902 comprises
Oilfield Country Tubular Goods available from various U.S. steel mills. The tubular
3 0 member 915 may comprise any number of conventional commercially available tubular members modified in accordance with the teachings of the present disclosure.
In a preferred embodiment, the tubular member 915 comprises Oilfield Country
Tubular Goods available from various U.S. steel mills.
The various elements of the tubular member 902 may be coupled using any number of conventional process such as, for example, threaded connections, welding 5 or machined from one piece. In a preferred embodiment, the various elements of the tubular member 902 are coupled using welding. The tubular member 902 may comprise a plurality of tubular elements that are coupled end to end. The various elements of the tubular member 915 may be coupled using any number of conventional process such as, for example, threaded connections, welding or machined from one 10 piece. In a preferred embodiment, the various elements of the tubular member 915 are coupled using welding. The tubular member 915 may comprise a plurality of tubular elements that are coupled end to end. The tubular members 902 and 915 may be coupled using any number of conventional process such as, for example, threaded connections, welding or machined from one piece.
15 The support member 904 preferably includes an innerstring adapter 916, a fluid passage 918, an upper guide 920, and a coupling 922. During operation of the apparatus 900, the support member 904 preferably supports the apparatus 900 during movement of the apparatus 900 within a wellbore. The support member 904 preferably has a substantially annular cross-section.
0 The support member 904 may be fabricated from any number of conventional commercially available materials such as, for example, oilfield tubulars, low alloy
steel, coiled tubing or stainless steel. In a preferred embodiment, the support member 904 is fabricated from low alloy steel in order to optimally provide high yield strength.
The innerstring adaptor 916 preferably is coupled to and supported by a 2 5 conventional drill string support from a surface location. The innerstring adaptor 916 may be coupled to a conventional drill string support 971 by a threaded connection 970. The fluid passage 918 is preferably used to convey fluids and other materials to and from the apparatus 900. In a preferred embodiment, the fluid passage 918 is 3 0 fluidicly coupled to the fluid passage 952. In a preferred embodiment, the fluid passage 918 is used to convey hardenable Ouidic sealing materials to and from the
Of - apparatus 900. In a particularly preferred embodiment, the fluid passage 9 l 8 may include one or more pressure relief passages (not illustrated) to release fluid pressure during positioning of the apparatus 900 within a wellbore. In a preferred embodiment, the fluid passage 9] 8 is positioned along a longitudinal centerline of the apparatus 900.
5 In a preferred embodiment, the fluid passage 9 l 8 is selected to permit the conveyance of hardenable fluidic materials at operating pressures ranging from about O to 9,000 psi. The upper guide 920 is coupled to an upper portion of the support member 904.
The upper guide 920 preferably is adapted to center the support member 904 within the 1 0 tubular member 915. The upper guide 920 may comprise any number of conventional guide members modified in accordance with the teachings of the present disclosure. In
a preferred embodiment, the upper guide 920 comprises an innerstring adapter available from Halliburton Energy Services in Dallas, TX order to optimally guide the apparatus 900 within the tubular member 9 l S. 1 5 The coupling 922 couples the support member 904 to the mandrel 906. The coupling 922 preferably comprises a conventional threaded connection.
The various elements of the support member 904 may be coupled using any number of conventional processes such as, for example, welding, threaded connections or machined from one piece. In a preferred embodiment, the various elements of the 2 0 support member 904 are coupled using threaded connections.
The mandrel 906 preferably includes a retainer 924, a rubber cup 926, an expansion cone 928, a lower cone retainer 930, a body of cement 932, a lower guide 934, an extension sleeve 936, a spacer 938, a housing 940, a sealing sleeve 942, an upper cone retainer 944, a lubricator mandrel 946, a lubricator sleeve 948, a guide 950, 2 5 and a fluid passage 952.
The retainer 924 is coupled to the lubricator mandrel 946, lubricator sleeve 948, and the rubber cup 926. The retainer 924 couples the rubber cup 926 to the lubricator sleeve 948. The retainer 924 preferably has a substantially annular cross-section. The retainer 924 may comprise any number of conventional commercially available 3 0 retainers such as, for example, sloped spring pins or roll pin.
o The rubber cup 926 is coupled to the retainer 924, the lubricator mandrel 946, and the lubricator sleeve 948. The rubber cup 926 prevents the entry of foreign materials into the interior region 972 of the tubular member 902 below the rubber cup 926. The rubber cup 926 may comprise any number of conventional commercially 5 available rubber cups such as, for example, TP cups or Selective Injection Packer (SIP) cup In a preferred embodiment, the rubber cup 926 comprises a SIP cup available from Halliburton Energy Services in Dallas, TX in order to optimally block foreign materials. In a particularly preferred embodiment, a body of lubricant is further provided 10 in the interior region 972 of the tubular member 902 in order to lubricate the interface between the exterior surface of the mandrel 902 and the interior surface of the tubular members 902 and 915. T he lubricant may comprise any number of conventional commercially available lubricants such as, for example, I ubriplate, chlorine based lubricants, oil based lubricants or Climax 1500 Antiseize (3100). In a preferred 15 embodiment, the lubricant comprises Climax 1500 Antiseize (3100) available from Climax Lubricants and Equipment Co. in Houston, TX in order to optimally provide lubrication to facilitate the extrusion process.
The expansion cone 928 is coupled to the lower cone retainer 930, the body of cement 932, the lower guide 934, the extension sleeve 936, the housing 94O, and the 20 upper cone retainer 944. In a preferred embodiment, during operation of the apparatus 900, the tubular members 902 and 915 are extruded offofthe outer surface of the expansion cone 928. In a preferred embodiment, axial movement of the expansion cone 928 is prevented by the lower cone retainer 930, housing 940 and the upper cone retainer 944 Inner radial movement of the expansion cone 928 is prevented by the 2 5 body of cement 932, the housing 940, and the upper cone retainer 944.
The expansion cone 928 preferably has a substantially annular cross section.
The outside diameter of the expansion cone 928 is preferably tapered to provide a cone shape. The wall thickness of the expansion cone 928 may range, for example, from about 0.125 to 3 inches. In a preferred embodiment, the wall thickness of the 3 0 expansion cone 928 ranges from about 0.25 to 0.75 inches in order to optimally provide adequate compressive strength with minimal material. The maximum and
c C- minimum outside diameters of the expansion cone 928 may range, for example, from about 1 to 47 inches. In a preferred embodiment, the maximum and minimum outside diameters of the expansion cone 928 range from about 3.5 to 19 in order to optimally provide expansion of generally available oilfeld tubulars 5 The expansion cone 928 may be fabricated from any number of conventional commercially available materials such as, for example, ceramic, tool steel, titanium or low alloy steel. In a preferred embodiment, the expansion cone 928 is fabricated from tool steel in order to optimally provide high strength and abrasion resistance. The surface hardness of the outer surface of the expansion cone 928 may range, for 10 example, from about 50 Rockwell C to 70 Rockwell C. In a preferred embodiment, the surface hardness of the outer surface of the expansion cone 928 ranges from about 58 Rockwell C to 62 Rockwell C in order to optimally provide high yield strength. In a preferred embodiment' the expansion cone 928 is heat treated to optimally provide a hard outer surface and a resilient interior body in order to optimally provide abrasion 15 resistance and fracture toughness.
The lower cone retainer 930 is coupled to the expansion cone 928 and the housing 940. In a preferred embodiment, axial movement of the expansion cone 928 is prevented by the lower cone retainer 930. Preferably, the lower cone retainer 930 has a substantially annular cross-section.
2 0 The lower cone retainer 930 may be fabricated from any number of conventional commercially available materials such as, for example, ceramic, tool steel, titanium or low alloy steel. In a preferred embodiment, the lower cone retainer 930 is fabricated from tool steel in order to optimally provide high strength and abrasion resistance. The surface hardness of the outer surface of the lower cone 2 5 retainer 930 may range, for example, from about 50 Rockwell C to 70 Rockwell C. In a preferred embodiment, the surface hardness of the outer surface of the lower cone retainer 930 ranges from about 58 Rockwell C to 62 Rockwell C in order to optimally provide high yield strength. In a preferred embodiment, the lower cone retainer 930 is heat treated to optimally provide a hard outer surface and a resilient interior body in 30 order to optimally provide abrasion resistance and fracture toughness.
A: In a preferred embodiment, the lower cone retainer 930 and the expansion cone 928 are formed as an integral one-piece element in order reduce the number of components and increase the overall strength of the apparatus. The outer surface of the lower cone retainer 930 preferably mates with the inner surfaces of the tubular 5 members 902 and 915.
The body of cement 932 is positioned within the interior of the mandrel 906.
The body of cement 932 provides an inner bearing structure for the mandrel 906. The body of cement 932 further may be easily drilled out using a conventional drill device.
In this manner, the mandrel 906 may be easily removed using a conventional drilling 1 0 device.
The body of cement 932 may comprise any number of conventional commercially available cement compounds. Alternatively, aluminum, cast iron or some other drillable metallic, composite, or aggregate material may be substituted for cement. The body of cement 932 preferably has a substantially annular cross-section.
15 The lower guide 934 is coupled to the extension sleeve 936 and housing 940.
During operation of the apparatus 900, the lower guide 934 preferably helps guide the movement of the mandrel 906 within the tubular member 902. The lower guide 934 preferably has a substantially annular cross-section.
The lower guide 934 may be fabricated from any number of conventional 2 0 commercially available materials such as, for example, oilfield tubulars, low alloy steel
or stainless steel. In a preferred embodiment, the lower guide 934 is fabricated from low alloy steel in order to optimally provide high yield strength. The outer surface of the lower guide 934 preferably mates with the inner surface of the tubular member 902 to provide a sliding fit.
2 5 The extension sleeve 936 is coupled to the lower guide 934 and the housing 940. During operation of the apparatus 900, the extension sleeve 936 preferably helps guide the movement of the mandrel 906 within the tubular member 902. The extension sleeve 936 preferably has a substantially annular cross-section.
The extension sleeve 936 may be fabricated from any number of conventional 30 commercially available materials such as, for example, oilfeld tubulars, low alloy steel or stainless steel. In a preferred embodiment, the extension sleeve 936 is fabricated
o C' from low alloy steel in order to optimally provide high yield strength. The outer surface of the extension sleeve 936 preferably mates with the inner surface of the tubular member 902 to provide a sliding fit. In a preferred embodiment, the extension sleeve 936 and the lower guide 934 are formed as an integral one-piece element in 5 order to minimize the number of components and increase the strength of the apparatus. The spacer 938 is coupled to the sealing sleeve 942. The spacer 938 preferably includes the fluid passage 952 and is adapted to mate with the extension tube 960 of the shoe 908. In this manner, a plug or dart can be conveyed from the surface through 1 0 the fluid passages 918 and 952 into the Quid passage 962. Preferably, the spacer 938 has a substantially annular cross-section.
The spacer 938 may be fabricated from any number of conventional commercially available materials such as, for example, steel, aluminum or cast iron. In a preferred embodiment, the spacer 938 is fabricated from aluminum in order to 1 S optimally provide drillability. The end of the spacer 938 preferably mates with the end of the extension tube 960. In a preferred embodiment, the spacer 938 and the sealing sleeve 942 are formed as an integral one-piece element in order to reduce the number of components and increase the strength of the apparatus.
The housing 940 is coupled to the lower guide 934, extension sleeve 936, 2 0 expansion cone 928, body of cement 932, and lower cone retainer 930. During operation of the apparatus 9(0, the housing 940 preferably prevents inner radial motion of the expansion cone 928. Preferably, the housing 940 has a substantially annular cross-section. The housing 940 may be fabricated from any number of conventional 2 5 commercially available materials such as, for example, oilfield tubulars, low alloy steel
or stainless steel. In a preferred embodiment, the housing 940 is fabricated from low alloy steel in order to optimally provide high yield strength. In a preferred embodiment, the lower guide 934, extension sleeve 936 and housing 940 are formed as an integral one-piece element in order to minimize the number of components and 3 0 increase the strength of the apparatus.
o In a particularly preferred embodiment, the interior surface of the housing 940 includes one or more protrusions to facilitate the connection between the housing 940 and the body of cement 932.
The sealing sleeve 942 is coupled to the support member 904, the body of 5 cement 932, the spacer 938, and the upper cone retainer 944. During operation of the apparatus, the sealing sleeve 942 preferably provides support for the mandrel 906. The sealing sleeve 942 is preferably coupled to the support member 904 using the coupling 922. Preferably, the sealing sleeve 942 has a substantially annular cross-section.
The sealing sleeve 942 may be fabricated from any number of conventional 10 commercially available materials such as, for example. steel, aluminum or cast iron. in a preferred embodiment, the sealing sleeve 942 is fabricated from aluminum in order to optimally provide drillability of the sealing sleeve 942.
In a particularly preferred embodiment, the outer surface of the sealing sleeve 942 includes one or more protrusions to facilitate the connection between the sealing 15 sleeve 942 and the body of cement 932.
In a particularly preferred embodiment, the spacer 938 and the sealing sleeve 942 are integrally formed as a one-piece element in order to minimize the number of components. The upper cone retainer 944 is coupled to the expansion cone 928, the sealing 2 0 sleeve 942, and the body of cement 932. During operation of the apparatus 900, the upper cone retainer 944 preferably prevents axial motion of the expansion cone 928.
Preferably, the upper cone retainer 944 has a substantially annular crosssection.
The upper cone retainer 944 may be fabricated from any number of conventional commercia!!y available materials such as, for example, steel, aluminum 25 or cast iron. In a preferred embodiment, the upper cone retainer 944 is fabricated from aluminum in order to optimally provide drillability of the upper cone retainer 944.
In a particularly preferred embodiment, the upper cone retainer 944 has a cross sectional shape designed to provide increased rigidity. In a particularly preferred embodiment, the upper cone retainer 944 has a cross-sectional shape that is 30 substantially 1-shaped to provide increased rigidity and minimize the amount of material that would have to be drilled out.
cj (-.
The lubricator mandrel 946 is coupled to the retainer 924, the rubber cup 926, the upper cone retainer 944, the lubricator sleeve 948, and the guide 950. During operation of the apparatus 900, the lubricator mandrel 946 preferably contains the body of lubricant in the annular region 972 for lubricating the interface between the mandrel 5 906 and the tubular member 902. Preferably, the lubricator mandrel 946 has a substantially annular cross-section.
The lubricator mandrel 946 may be fabricated from any number of conventional commercially available materials such as, for example, steel, aluminum or cast iron. In a preferred embodiment, the lubricator mandrel 946 is fabricated from aluminum in 1 0 order to optimally provide drillability of the lubricator mandrel 946.
The lubricator sleeve 948 is coupled to the lubricator mandrel 946, the retainer 924, the rubber cup 926, the upper cone retainer 944, the lubricator sleeve 948, and the guide 950. During operation of the apparatus 900, the lubricator sleeve 948 preferably supports the rubber cup 926. Preferably, the lubricator sleeve 948 has a substantially 15 annular cross-section.
The lubricator sleeve 948 may be fabricated from any number of conventional commercially available materials such as, for example, steel, aluminum or cast iron. In a preferred embodiment, the lubricator sleeve 948 is fabricated from aluminum in order to optimally provide drillability of the lubricator sleeve 948.
2 0 As illustrated in Fig. 9c, the lubricator sleeve 948 is supported by the lubricator mandrel 946. The lubricator sleeve 948 in turn supports the rubber cup 926. The retainer 924 couples the rubber cup 926 to the lubricator sleeve 948. In a preferred embodiment, seals 949a and 949b are provided between the lubricator mandrel 946, lubricator sleeve 948, and rubber cup 926 in order to optimally seal off the interior 2 5 region 972 of the tubular member 902.
The guide 950 is coupled to the lubricator mandrel 946, the retainer 924, and the lubricator sleeve 948. During operation of the apparatus 900, the guide 950 preferably guides the apparatus on the support member 904. Preferably, the guide 950 has a substantially annular cross-section.
3 0 The guide 950 may be fabricated from any number of conventional commercially available materials such as, for example, steel, aluminum or cast iron. In
(:: a preferred embodiment, the guide 950 is fabricated from aluminum order to optimally provide drillability of the guide 950.
The fluid passage 952 is coupled to the mandrel 906. During operation of the apparatus, the fluid passage 952 preferably conveys hardenable fluidic materials. In a 5 preferred embodiment, the fluid passage 952 is positioned about the centerline of the apparatus 900. In a particularly preferred embodiment, the fluid passage 952 is adapted to convey hardenable fluidic materials at pressures and flow rate ranging from about O to 9,000 psi and 0 to 3,000 gallons/min in order to optimally provide pressures and flow rates to displace and circulate fluids during the installation of the apparatus 1 0 900.
The various elements of the mandrel 906 may be coupled using any number of conventional process such as, for example, threaded connections, welded connections or cementing. In a preferred embodiment, the various elements of the mandrel 906 are coupled using threaded connections and cementing.
15 The shoe 908 preferably includes a housing 954, a body of cement 956, a sealing sleeve 958, an extension tube 960, a fluid passage 962, and one or more outlet jets 964.
The housing 954 is coupled to the body of cement 956 and the lower portion 914 of the tubular member 902. During operation of the apparatus 900, the housing 0 954 preferably couples the lower portion of the tubular member 902 to the shoe 908 to facilitate the extrusion and positioning of the tubular member 902. Preferably' the housing 954 has a substantially annular cross-section.
The housing 954 may be fabricated from any number of conventional commercially available materials such as, for example, steel or aluminum. In a 25 preferred embodiment, the housing 954 is fabricated from aluminum in order to optimally provide drillability of the housing 954.
In a particularly preferred embodiment, the interior surface of the housing 954 includes one or more protrusions to facilitate the connection between the body of cement 956 and the housing 954.
30 The body of cement 956 is coupled to the housing 954, and the sealing sleeve 958. In a preferred embodiment, the composition of the body of cement 956 is
selected to permit the body of cement to be easily drilled out using conventional drilling machines and processes.
The composition of the body of cement 956 may include any number of conventional cement compositions. In an alternative embodiment, a drillable material 5 such as, for example, aluminum or iron may be substituted for the body of cement 956.
The sealing sleeve 958 is coupled to the body of cement 956, the extension tube 960, the fluid passage 962, and one or more outlet jets 964. During operation of the apparatus 900, the sealing sleeve 9SS preferably is adapted to convey a hardenable fluidic material from the fluid passage 952 into the fluid passage 962 and then into the 10 outlet jets 964 in order to inject the hardenable fluidic material into an annular region external to the tubular member 902. In a preferred embodiment, during operation of the apparatus 900, the sealing sleeve 958 further includes an inlet geometry that permits a conventional plug or dart 974 to become lodged in the inlet of the sealing sleeve 958. In this manner, the fluid passage 962 may be blocked thereby fluidicly 15 isolating the interior region 966 ofthe tubular member 902.
In a preferred embodiment, the sealing sleeve 958 has a substantially annular cross-section. The sealing sleeve 958 may be fabricated from any number of conventional commercially available materials such as, for example, steel, aluminum or cast iron. In a preferred embodiment, the sealing sleeve 958 is fabricated from 20 aluminum in order to optimally provide drillability of the sealing sleeve 958.
The extension tube 960 is coupled to the sealing sleeve 958, the fluid passage 962, and one or more outlet jets 964. During operation of the apparatus 900, the extension tube 960 preferably is adapted to convey a hardenable fluidic material from the fluid passage 952 into the fluid passage 962 and then into the outlet jets 964 in 25 order to inject the hardenable fluidic material into an annular region external to the tubular member 902. In a preferred embodiment, during operation of the apparatus 900, the sealing sleeve 960 further includes an inlet geometry that permits a conventional plug or dart 974 to become lodged in the inlet ofthe sealing sleeve 958.
In this manner, the fluid passage 962 is blocked thereby fluidicly isolating the interior 30 region 966 of the tubular member 902. In a preferred embodiment, one end of the
or extension tube 960 mates with one end of the spacer 938 in order to optimally facilitate the transfer of material between the two.
In a preferred embodiment, the extension tube 960 has a substantially annular cross-section. The extension tube 960 may be fabricated from any number of 5 conventional commercially available materials such as, for example, steel, aluminum or cast iron. In a preferred embodiment, the extension tube 960 is fabricated from aluminum in order to optimally provide drillability of the extension tube 960.
The fluid passage 962 is coupled to the sealing sleeve 958, the extension tube 960, and one or more outlet jets 964. During operation of the apparatus 900, the fluid 1 0 passage 962 is preferably conveys hardenable fluidic materials. In a preferred embodiment, the fluid passage 962 is positioned about the centerline of the apparatus 900. In a particularly preferred embodiment, the fluid passage 962 is adapted to convey hardenable fluidic materials at pressures and flow rate ranging from about O to 9,000 psi and 0 to 3,000 gallons/min in order to optimally provide fluids at 1 5 operationally efficient rates.
The outlet jets 964 are coupled to the sealing sleeve 958, the extension tube 960, and the fluid passage 962. During operation of the apparatus 900, the outlet jets 964 preferably convey hardenable fluidic material from the fluid passage 962 to the region exterior of the apparatus 900. In a preferred embodiment, the shoe 908 includes O a plurality of outlet jets 964.
In a preferred embodiment' the outlet jets 964 comprise passages drilled in the housing 954 and the body of cement 956 in order to simplify the construction of the apparatus 900.
The various elements of the shoe 908 may be coupled using any number of 2 5 conventional process such as, for example, threaded connections, cement or machined from one piece of material. In a preferred embodiment, the various elements of the shoe 908 are coupled using cement.
In a preferred embodiment, the assembly 900 is operated substantially as described above with reference to Figs. 1-8 to create a new section of casing in a 3 0 wellbore or to repair a wellbore casing or pipeline.
^ Ion In particular, in order to extend a wellbore into a subterranean formation, a drill string is used in a well known manner to drill out material from the subterranean formation to form a new section.
The apparatus 900 for forming a wellbore casing in a subterranean formation is 5 then positioned in the new section of the wellbore. In a particularly preferred embodiment, the apparatus 900 includes the tubular member 91 S. In a preferred embodiment, a hardenable fluidic sealing hardenable fluidic sealing material is then pumped from a surface location into the fluid passage 918. The hardenable fluidic sealing material then passes from the fluid passage 918 into the interior region 966 of 10 the tubular member 902 below the mandrel 906. The hardenable fluidic sealing material then passes from the interior region 966 into the fluid passage 962. The hardenable fluidic sealing material then exits the apparatus 900 via the outlet jets 964 and fills an annular region between the exterior of the tubular member 902 and the interior wall of the new section of the wellbore. Continued pumping of the hardenable 15 fluidic sealing material causes the material to fill up at least a portion of the annular region. The hardenable fluidic sealing material is preferably pumped into the annular region at pressures and flow rates ranging, for example, from about O to 5,000 psi and O to 1,500 gallons/min, respectively. In a preferred embodiment, the hardenable 2 0 fluidic sealing material is pumped into the annular region at pressures and flow rates that are designed for the specific wellbore section in order to optimize the displacement of the hardenable fluidic sealing material while not creating high enough circulating pressures such that circulation might be lost and that could cause the wellbore to collapse. The optimum pressures and flow rates are preferably determined 2 5 using conventional empirical methods.
The hardenable fluidic sealing material may comprise any number of conventional commercially available hardenable fluidic sealing materials such as, for example, slag mix, cement or epoxy. In a preferred embodiment, the hardenable fluidic sealing material comprises blended cements designed specifically for the well 30 section being lined available from Halliburton Energy Services in Dallas, TX in order to optimally provide support for the new tubular member while also maintaining
G - optimal flow characteristics so as to minimize operational difficulties during the displacement of the cement in the annular region. The optimum composition of the blended cements is preferably determined using conventional empirical methods.
The annular region preferably is filled with the hardenable fluidic sealing 5 material in sufficient quantities to ensure that, upon radial expansion of the tubular member 902, the annular region of the new section of the wellbore will be filled with hardenable material.
Once the annular region has been adequately filled with hardenable fluidic sealing material, a plug or dart 974, or other similar device, preferably is introduced 10 into the fluid passage 962 thereby fluidicly isolating the interior region 966 of the tubular member 902 from the external annular region. In a preferred embodiment, a non hardenable fluidic material is then pumped into the interior region 966 causing the interior region 966 to pressurize. In a particularly preferred embodiment, the plug or dart 974, or other similar device, preferably is introduced into the fluid passage 962 by 15 introducing the plug or dart 974, or other similar device into the non hardenable fluidic material. In this manner, the amount of cured material within the interior of the tubular members 902 and 915 is minimized.
Once the interior region 966 becomes sufficiently pressurized, the tubular members 902 and 915 are extruded off of the mandrel 906. I he mandrel 906 may be 2 0 fixed or it may be expandable. During the extrusion process, the mandrel 906 is raised out of the expanded portions of the tubular members 902 and 915 using the support member 904. During this extrusion process, the shoe 908 is preferably substantially stationary. I he plug or dam 974 is preferably placed into the fluid passage 962 by 25 introducing the plug or dart 974 into the fluid passage 918 at a surface location in a conventional manner. The plug or dart 974 may comprise any number of conventional commercially available devices for plugging a fluid passage such as, for example, Multiple Stage Cementer (MSC) latch-dovvn plug, Omega latch-down plug or three wiper latch down plug modified in accordance with the teachings of the present 30 disclosure. In a preferred embodiment, the plug or dart 974 comprises a MSC latch
down plug available from Halliburton Energy Services in Dallas, TX.
r A, - After placement of the plug or dart 974 in the fluid passage 962, the non hardenable fluidic material is preferably pumped into the interior region 966 at pressures and flow rates ranging from approximately 500 to 9,000 psi and 40 to 3000 gallons/min in order to optimally extrude the tubular members 902 and 915 off of the 5 mandrel 906.
For typical tubular members 902 and 915, the extrusion of the tubular members 902 and 915 off of the expandable mandrel will begin when the pressure of the interior region 966 reaches approximately 500 to 9,000 psi. In a preferred embodiment, the extrusion of the tubular members 902 and 915 off of the mandrel 906 begins when the 10 pressure of the interior region 966 reaches approximately 1,200 to 8,500 psi with a flow rate of about 40 to 1250 gallons/minute.
During the extrusion process, the mandrel 906 may be raised out of the expanded portions of the tubular members 902 and 915 at rates ranging, for example, from about O to 5 fVsec. In a preferred embodiment, during the extrusion process, the 15 mandrel 906 is raised out of the expanded portions of the tubular members 902 and 915 at rates ranging from about 0 to 2 ft/sec in order to optimally provide pulling speed fast enough to permit efficient operation and permit full expansion of the tubular members 902 and 91 S prior to curing of the hardenable fluidic sealing material; but not so fast that timely adjustment of operating parameters during operation is prevented.
20 When the upper end portion of the tubular member 915 is extruded off of the mandrel 906, the outer surface ofthe upper end portion of the tubular member 915 will preferably contact the interior surface of the lower end portion of the existing casing to form an fluid tight overlapping joint. The contact pressure of the overlapping joint may range, for example, from approximately 50 to 20,000 psi. In a preferred 25 embodiment, the contact pressure of the overlapping joint between the upper end of the tubular member 915 and the existing section of wellbore casing ranges from approximately 400 to 10,000 psi in order to optimally provide contact pressure to activate the sealing members and provide optimal resistance such that the tubular member 915 and existing wellbore casing will carry typical tensile and compressive 30 loads.
c C In a preferred embodiment, the operating pressure and flow rate of the non hardenable fluidic material will be controllably ramped down when the mandrel 906 reaches the upper end portion of the tubular member 91 S. In this manner, the sudden release of pressure caused by the complete extrusion of the tubular member 915 off of 5 the expandable mandrel 906 can be minimized. In a preferred embodiment, the operating pressure is reduced in a substantially linear fashion from 100% to about 10% during the end of the extrusion process beginning when the mandrel 906 has completed approximately all but about the last 5 feet of the extrusion process.
In an alternative preferred embodiment, the operating pressure and/or flow rate 10 of the hardenable fluidic sealing material andlor the non hardenable fluidic material are controlled during all phases of the operation of the apparatus 900 to minimize shock.
Alternatively, or in combination, a shock absorber is provided in the support member 904 in order to absorb the shock caused by the sudden release of pressure.
Alternatively, or in combination, a mandrel catching structure is provided 15 above the support member 904 in order to catch or at least decelerate the mandrel 906.
Once the extrusion process is completed, the mandrel 906 is removed from the wellbore. In a preferred embodiment, either before or after the removal of the mandrel 906, the integrity of the fluidic seal of the overlapping joint between the upper portion of the tubular member 915 and the lower portion of the existing casing is tested using 2 0 conventional methods. If the fluidic seal of the overlapping joint between the upper portion of the tubular member 915 and the lower portion of the existing casing is satisfactory, then the uncured portion of any of the hardenable fluidic sealing material within the expanded tubular member 915 is then removed in a conventional manner.
The ho denable Druidic sealing material within the annular region between the 2 5 expanded tubular member 915 and the existing casing and new section of wellbore is then allowed to cure.
Preferably any remaining cured hardenable fluidic sealing material within the interior of the expanded tubular members 902 and 915 is then removed in a conventional manner using a conventional drill string. The resulting new section of 3 0 casing preferably includes the expanded tubular members 902 and 915 and an outer annular layer of cured hardenable fluidic sealing material. The bottom portion of the
c apparatus 900 comprising the shoe 908 may then be removed by drilling out the shoe 908 using conventional drilling methods.
In an alternative embodiment, during the extrusion process, it may be necessary to remove the entire apparatus 900 from the interior of the wellbore due to a 5 malfunction. In this circumstance, a conventional drill string is used to drill out the interior sections of the apparatus 900 in order to facilitate the removal of the remaining sections. In a preferred embodiment, the interior elements of the apparatus 900 are fabricated from materials such as, for example, cement and aluminum, that permit a conventional drill string to be employed to drill out the interior components.
l a In particular, in a preferred embodiment, the composition of the interior sections of the mandrel 906 and shoe 908, including one or more of the body of cement 932, the spacer 938, the sealing sleeve 942, the upper cone retainer 944, the lubricator mandrel 946, the lubricator sleeve 948, the guide 950, the housing 954, the body of cement 956, the sealing sleeve 958, and the extension tube 960, are selected to permit 1 5 at least some of these components to be drilled out using conventional drilling methods and apparatus. In this manner, in the event of a malfunction downhole, the apparatus 900 may be easily removed from the wellbore.
Referring now to Figs. I Oa, I Ob, l Oc, led, I be, 10f, and l Og a method and apparatus for creating a tie-back liner in a wellbore will now be described. As 2 o illustrated in Fig. I Oa, a wellbore I 000 positioned in a subterranean formation 1002 includes a first casing 1004 and a second casing 1006.
The first casing 1004 preferably includes a tubular liner 1008 and a cement arnulus 1010. The second casing 1006 preferably includes a tubular liner 1012 and a cement annulus 1014. In a preferred embodiment, the second casing 1006 is formed 2 5 by expanding a tubular member substantially as described above with reference to Figs. 1-9c or below with reference to Figs. 1 la-1 If.
In a particularly preferred embodiment, an upper portion of the tubular liner I 012 overlaps with a lower portion of the tubular liner 1008. In a particularly preferred embodiment, an outer surface of the upper portion of the tubular liner 1012 30 includes one or more sealing members 1016 for providing a fluidic seal between the tubular liners 1008 and 1012.
c) Referring to Fig. 1 Oh, in order to create a tie-back liner that extends from the overlap between the first and second casings, 1004 and 1006, an apparatus 1 100 is preferably provided that includes an expandable mandrel or pig 1 105, a tubular member 1 1 10, a shoe 1 1 15, one or more cup seals 1 120, a fluid passage 1 130, a fluid 5 passage 1 135, one or more fluid passages 1 140, seals 1 145, and a support member 1150. The expandable mandrel or pig 1105 is coupled to and supported by the support member 1150. The expandable mandrel 1105 is preferably adapted to controllably expand in a radial direction. The expandable mandrel 1 105 may comprise any number 10 of conventional commercially available expandable mandrels modified in accordance with the teachings of the present disclosure. In a preferred embodiment, the
expandable mandrel 1 105 comprises a hydraulic expansion tool substantially as disclosed in U.S. Pat. No. 5,348,095, the disclosure of which is incorporated herein by
reference, modified in accordance with the teachings of the present disclosure.
15 The tubular member 1 1 10 is coupled to and supported by the expandable mandrel 1105. The tubular member 1105 is expanded in the radial direction and extruded off of the expandable mandrel 1 105. The tubular member I I 10 may be fabricated from any number of materials such as, for example, Oilfield Country
Tubular Goods, 13 chromium tubing or plastic piping. In a preferred embodiment, the 2 0 tubular member 1 1 10 is fabricated from Oilfield Country Tubular Goods.
The inner and outer diameters of the tubular member 1 1 10 may range, for example, from approximately 0.75 to 47 inches and 1.05 to 48 inches, respectively. In a preferred embodiment, the inner and outer diameters of the tubular member 11 10 range from about 3 to l 5.5 inches ad 3.5 to 16 inches, respectively in order to 25 optimally provide coverage for typical oilfield casing sizes. The tubular member 1110
preferably comprises a solid member.
In a preferred embodiment, the upper end portion of the tubular member 1 1 10 is slotted, perforated, or otherwise modified to catch or slow down the mandrel 1 105 when it completes the extrusion of tubular member 1110. In a preferred embodiment, 3 0 the length of the tubular member 1110 is limited to minimize the possibility of
on buckling. For typical tubular member 1 1 I O materials, the length of the tubular member 1 1 10 is preferably limited to between about 40 to 20, 000 feet in length.
The shoe I 1 15 is coupled to the expandable mandrel 1 105 and the tubular member 1110. The shoe 1115 includes the fluid passage 1135. The shoe 1 115 may 5 comprise any number of conventional commercially available shoes such as, for example, Super Seal II float shoe, Super Seal II Down-Jet float shoe or a guide shoe with a sealing sleeve for a latch down plug modified in accordance with the teachings of the present disclosure. In a preferred embodiment, the shoe I 1 15 comprises an
aluminum downjet guide shoe with a sealing sleeve for a latch-down plug with side 10 ports radiating off of the exit flow port available from Halliburton Energy Services in Dallas, TX, modified in accordance with the teachings of the present disclosure, in
order to optimally guide the tubular member I 100 to the overlap between the tubular member 1100 and the casing 1012, optimally puidicly isolate the interior of the tubular member 1 100 after the latch down plug has seated, and optimally permit drilling out of 15 the shoe 1 1 15 after completion of the expansion and cementing operations.
In a preferred embodiment, the shoe 1 1 15 includes one or more side outlet ports 1 140 in fluidic communication with the fluid passage 1 135. In this manner, the shoe 1 1 15 injects hardenable fluidic sealing material into the region outside the shoe I 1 15 and tubular member I I 10. In a preferred embodiment, the shoe 1 1 I 5 includes one or 20 more ofthe fluid passages 1140 each having an inlet geometry that can receive a dart and/or a ball sealing member. In this manner, the fluid passages 1140 can be sealed off by introducing a plug, dart and/or ball sealing elements into the fluid passage 1 130.
The cup seal 1 120 is coupled to and supported by the support member 1 150.
The cup seal 1 120 prevents foreign materials from entering the interior region of the 2 5 tubular member 1 1 10 adjacent to the expandable mandrel 1 105. The cup seal 1 120 may comprise any number of conventional commercially available cup seals such as, for example, TP cups or Selective Injection Packer (SIP) cups modified in accordance with the teachings of the present disclosure. In a preferred embodiment, the cup seal
1120 comprises a SIP cup, available from Halliburton Energy Services in Dallas, TX 3 0 in order to optimally provide a barrier to debris and contain a body of lubricant.
[;7
GO The fluid passage 1130 permits fluidic materials to be transported to and from the interior region of the tubular member I l 10 below the expandable mandrel 1105.
The fluid passage 1130 is coupled to and positioned within the support member 1150 and the expandable mandrel 1 105. The fluid passage 1 130 preferably extends from a 5 position adjacent to the surface to the bottom of the expandable mandrel 1105. The fluid passage 1 130 is preferably positioned along a centerline of the apparatus I 100.
The fluid passage 1130 is preferably selected to transport materials such as cement, drilling mud or epoxies at flow rates and pressures ranging from about O to 3,000 gallons/minute and O to 9,000 psi in order to optimally provide sufficient operating 10 pressures to circulate fluids at operationally efficient rates.
The fluid passage 1 l 35 permits fluidic materials to be transmitted from fluid passage 1 130 to the interior of the tubular member 1 1 10 below the mandrel 1 105.
The fluid passages 1140 permits fluidic materials to be transported to and from the region exterior to the tubular member 1 l 10 and shoe 1 1 15. The fluid passages 15 1 140 are coupled to and positioned within the shoe 1 1 15 in fluidic communication with the interior region of the tubular member 1 1 10 below the expandable mandrel 1105. The fluid passages 1140 preferably have a cross-sectional shape that permits a plug, or other similar device, to be placed in the fluid passages 1140 to thereby block farther passage of fluidic materials. In this manner, the interior region of the tubular 2 0 member 1 1 10 below the expandable mandrel 1 105 can be fluidicly isolated from the region exterior to the tubular member 1 l OS. This permits the interior region of the tubular member 1 1 10 below the expandable mandrel 1 105 to be pressurized.
The fluid passages 1 140 are preferably positioned along the periphery of the shoe 1115. The fluid passages 1140 me preferably selected to convey materials such 2 5 as cement, drilling mud or epoxies at flow rates and pressures ranging from about 0 to 3,000 gallons/minute and 0 to 9,000 psi in order to optimally fill the annular region between the tubular member 1110 and the tubular liner 1008 with fluidic materials. In a preferred embodiment, the fluid passages 1140 include an inlet geometry that can receive a dart andlor a ball sealing member. In this manner, the fluid passages 1140 3 0 can be sealed off by introducing a plug, dart and/or ball sealing elements into the fluid
To passage 1 130. In a preferred embodiment, the apparatus 1 100 includes a plurality of fluid passage 1 140.
In an alternative embodiment, the base of the shoe I 1 15 includes a single inlet passage coupled to the fluid passages 1140 that is adapted to receive a plug, or other 5 similar device, to permit the interior region of the tubular member 1 1 10 to be fluidicly isolated from the exterior of the tubular member 1 1 10.
The seals 1145 are coupled to and supported by a lower end portion of the tubular member 1 1 10. The seals 1 145 are further positioned on an outer surface of the lower end portion of the tubular member 1 1 10. The seals 1 145 permit the overlapping 10 joint between the upper end portion of the casing 1012 and the lower end portion of the tubular member 1110 to be fluidicly sealed.
he seals 1 145 may comprise any number of conventional commercially available seals such as, for example, lead, rubber, Teflon or epoxy seals modified in accordance with the teachings of the present disclosure. In a preferred embodiment,
15 the seals 1 145 comprise seals molded from Stratalock epoxy available from Halliburton Energy Services in Dallas, TX in order to optimally provide a hydraulic seal in the overlappingoint and optimally provide load carrying capacity to withstand the range of typical tensile and compressive loads.
In a preferred embodiment, the seals 1 145 are selected to optimally provide a 2 0 sufficient frictional force to support the expanded tubular member I 1 10 from the tubular liner 1008. In a preferred embodiment, the frictional force provided by the seals 1 145 ranges from about 1,000 to 1, 000,000 Ibf in tension and compression in order to optimally support the expanded tubular member 1110.
The support member 1 150 is coupled to the expandable mandrel 1 105, tubular 2 5 member 1 1 10, shoe I 1 15, and seal 1 120. The support member 1 150 preferably comprises an annular member having sufficient strength to carry the apparatus 1 100 into the wellbore 1000. In a preferred embodiment, the support member 1 150 further includes one or more conventional centralizers (not illustrated) to help stabilize the tubular member 1 1 10.
3 0 In a preferred embodiment, a quantity of lubricant 1 150 is provided in the annular region above the expandable mandrel 1 105 within the interior of the tubular
o member I 1 10. In this manner, the extrusion of the tubular member 1 1 10 off of the expandable mandrel 1 105 is facilitated. The lubricant 1 150 may comprise any number of conventional commercially available lubricants such as, for example, Lubriplate, chlorine based lubricants or Climax 1500 Antiseize (3100). In a preferred 5 embodiment, the lubricant 1150 comprises Climax 1500 Antiseize (3100) available from Climax Lubricants and Equipment Co. in Houston, TX in order to optimally provide lubrication for the extrusion process.
In a preferred embodiment, the support member l l SO is thoroughly cleaned prior to assembly to the remaining portions of the apparatus 1100. In this manner, the 10 introduction of foreign material into the apparatus 1 100 is minimized. This minimizes
the possibility of foreign material clogging the various flow passages and valves of the apparatus 1100 and to ensure that no foreign material interferes with the expansion mandrel 1 105 during the extrusion process.
In a particularly preferred embodiment, the apparatus 1 100 includes a packer 15 1155 coupled to the bottom section ofthe shoe 1115 for fluidicly isolating the region ofthe wellbore 1000 below the apparatus 1100. In this manner, fluidic materials are prevented from entering the region of the wellbore 1000 below the apparatus I 100.
The packer 1 155 may comprise any number of conventional commercially available packers such as, for example, EZ Drill Packer, EZ SV Packer or a drillable cement 2 0 retainer. In a preferred embodiment, the packer 1 155 comprises an EZ Drill Packer available from Halliburton Energy Services in Dallas, TX. In an alternative embodiment, a high gel strength pill may be set below the tie-back in place of the packer l 155. In another alternative embodiment, the packer 1155 may be omitted.
In a preferred embodiment, before or after positioning the apparatus I 100 2 5 within the wellbore I 100, a couple of wellbore volumes are circulated in order to ensure that no foreign materials are located within the wellbore 1000 that might clog up the various flow passages and valves of the apparatus 1 100 and to ensure that no foreign material interferes with the operation of the expansion mandrel 1 105.
As illustrated in Fig. lOc, a hardenable fluidic sealing material 1160 is then 30 pumped from a surface location into the fluid passage 1 130. The material 1 160 then passes from the fluid passage 1 130 into the interior region of the tubular member 1 1 10
oU- below the expandable mandrel 1 105. The material 1 160 then passes from the interior region of the tubular member 1 1 10 into the fluid passages 1 140. The material 1 160 then exits the apparatus I 100 and fills the annular region between the exterior of the tubular member I 1 1 0 and the interior wall of the tubular liner 1008. Continued 5 pumping ofthe material 1 160 causes the material 1 160 to fill up at least a portion of the annular region.
The material 1160 may be pumped into the annular region at pressures and flow rates ranging, for example, from about O to S,OOO psi and O to 1,500 gallons/min, respectively. In a preferred embodiment, the material 1 160 is pumped into the annular 10 region at pressures and flow rates specifically designed for the casing sizes being run, the annular spaces being filled, the pumping equipment available, and the properties of the fluid being pumped. The optimum flow rates and pressures are preferably calculated using conventional empirical methods.
The hardenable fluidic sealing material 1 160 may comprise any number of 15 conventional commercially available hardenable fluidic sealing materials such as, for example, slag mix, cement or epoxy. In a preferred embodiment, the hardenable fluidic sealing material 1160 comprises blended cements specifically designed for well section being tied-back, available from Halliburton Energy Services in Dallas, TX in order to optimally provide proper support for the tubular member] I 10 while 2 0 maintaining optimum flow characteristics so as to minimize operational difficulties during the displacement of cement in the annular region. The optimum blend of the blended cements are preferably determined using conventional empirical methods.
The annular region may be filled with the material 1 160 in sufficient quantities to ensure that, upon radial expansion of the tubular member 11 10, the annular region 2 5 will be filled with material 1 160.
As illustrated in Fig. 1 Od, once the annular region has been adequately filled with material 1 160, one or more plugs 1 165, or other similar devices, preferably are introduced into the fluid passages 1140 thereby fluidicly isolating the interior region of the tubular member 1 1 10 from the annular region external to the tubular member I I 10.
3 0 In a preferred embodiment, a non hardenable fluidic material 1 161 is then pumped into the interior region of the tubular member l I I O below the mandrel 105 causing the
o interior region to pressurize. In a particularly preferred embodiment, the one or more plugs 1165, or other similar devices, are introduced into the fluid passage 1140 with the introduction of the non hardenable fluidic material. In this manner' the amount of
hardenable fluidic material within the interior of the tubular member 1110 is 5 minimized.
As illustrated in Fig. I Oe, once the interior region becomes sufficiently pressurized, the tubular member 1 1 10 is extruded off of the expandable mandrel 1 l OS.
During the extrusion process, the expandable mandrel 1 105 is raised out of the expanded portion of the tubular member 1 1 10.
1 0 The plugs 1 165 are preferably placed into the fluid passages 1 140 by introducing the plugs 1165 into the fluid passage 1 130 at a surface location in a conventional manner. The plugs 1 165 may comprise any number of conventional commercially available devices from plugging a fluid passage such as, for example, brass balls, plugs, rubber balls, or darts modified in accordance with the teachings of 15 the present disclosure.
In a preferred embodiment, the plugs 1 165 comprise low density rubber balls.
In an alternative embodiment, for a shoe 1 105 having a common central inlet passage, the plugs 1165 comprise a single latch down dart.
After placement of the plugs 1 165 in the fluid passages 1 140, the non 2 0 hardenable fluidic material 1 161 is preferably pumped into the interior region of the tubular member 1 1 10 below the mandrel 1 105 at pressures and flow rates ranging from approximately 500 to 9,000 psi and 40 to 3,000 gallons/mint In a preferred embodiment, after placement of the plugs 1 165 in the fluid passages 1140, the non hm-denable Druidic material 1;6i is preferably pumped into the interior 2 5 region of the tubular member I 1 10 below the mandrel 1 105 at pressures and flow rates ranging from approximately 1200 to 8500 psi and 40 to 1250 gallons/min in order to optimally provide extrusion of typical tubulars.
For typical tubular members I I 10, the extrusion of the tubular member I 1 10 off of the expandable mandrel 1 105 will begin when the pressure of the interior region 3 0 of the tubular member 1 110 below the mandrel 1105 reaches, for example, approximately 1200 to 8500 psi. In a preferred embodiment, the extrusion of the
on tubular member 1110 off of the expandable mandrel 1105 begins when the pressure of the interior region of the tubular member 1 10 below the mandrel 1 105 reaches approximately 1200 to 8500 psi.
During the extrusion process, the expandable mandrel I 105 may be raised out 5 of the expanded portion of the tubular member I I 10 at rates ranging, for example, from about O to 5 ft/sec. In a preferred embodiment, during the extrusion process, the expandable mandrel 1105 is raised out of the expanded portion of the tubular member 1 110 at rates ranging from about 0 to 2 ft/sec in order to optimally provide permit adjustment of operational parameters, and optimally ensure that the extrusion process 10 will be completed before the material 1 160 cures.
In a preferred embodiment, at least a portion 1 180 of the tubular member 1 1 10 has an internal diameter less than the outside diameter of the mandrel I 105. In this manner, when the mandrel I 105 expands the section 1 180 of the tubular member I I 10, at least a portion ofthe expanded section 1 180 effects a seal with at least the wellbore 15 casing 1012. In a particularly preferred embodiment, the seal is effected by compressing the seals 1016 between the expanded section I 180 and the wcllbore casing 1012. In a preferred embodiment, the contact pressure of the joint between the expanded section 1 180 of the tubular member I I 10 and the casing 1012 ranges from about 500 to 10,000 psi in order to optimally provide pressure to activate the sealing 2 0 members 1 145 and provide optimal resistance to ensure that the joint will withstand typical extremes of tensile and compressive loads.
In an alternative preferred embodiment, substantially all of the entire length of the tubular member I 1 10 has an internal diameter less than the outside diameter of the mandrel 1 105. In this manner, extrusion of the tubular member I I 10 by the mandrel 2 5 1 105 results in contact between substantially all of the expanded tubular member I 1 10 and the existing casing 1008. In a preferred embodiment, the contact pressure of the joint between the expanded tubular member 1110 and the casings 1008 and 1012 ranges from about 500 to 10,000 psi in order to optimally provide pressure to activate the sealing members 1145 and provide optimal resistance to ensure that the joint will 3 0 withstand typical extremes of tensile and compressive loads.
o In a preferred embodiment, the operating pressure and flow rate of the material 1161 is controllably ramped down when the expandable mandrel 1105 reaches the upper end portion of the tubular member 1110. In this manner, the sudden release of pressure caused by the complete extrusion of the tubular member 1 1 10 off of the 5 expandable mandrel 1 105 can be minimized. In a preferred embodiment, the operating pressure ofthe fluidic material 1161 is reduced in a substantially linear fashion from 100% to about l O% during the end of the extrusion process beginning when the mandrel 1 105 has completed approximately all but about 5 feet of the extrusion process. 10 Alternatively, or in combination, a shock absorber is provided in the support member 1 150 in order to absorb the shock caused by the sudden release of pressure.
Alternatively, or in combination, a mandrel catching structure is provided in the upper end portion of the tubular member I 1 10 in order to catch or at least decelerate the mandrel 1 105.
15 Referring to Fig. 1 Of, once the extrusion process is completed, the expandable mandrel 1 105 is removed from the wellbore 1000. In a preferred embodiment, either before or after the removal of the expandable mandrel 1 105, the integrity of the fluidic seal of the joint between the upper portion of the tubular member 1 1 10 and the upper portion of the tubular liner 1108 is tested using conventional methods. If the fluidic 2 0 seal of the joint between the upper portion of the tubular member 1 1 10 and the upper portion of the tubular liner 1008 is satisfactory, then the uncured portion of the material 1 160 within the expanded tubular member l 1 10 is then removed in a conventional manner. The material 1 l 60 within the annular region between the tubular llle. nbef 1 10 and the tubular liner 1008 is then allowed to cure.
2 5 As illustrated in Fig. lOf, preferably any remaining cured material 1 160 within the interior of the expanded tubular member l 1 10 is then removed in a conventional manner using a conventional drill string. The resulting tie-back liner of casing 1 170 includes the expanded tubular member 11 l O and an outer annular layer 1175 of cured material 1160.
o C- As illustrated in Fig. 10g, the remaining bottom portion of the apparatus 1100 comprising the shoe 1115 and packer 1155 is then preferably removed by drilling out the shoe 1115 and packer 1155 using conventional drilling methods.
In a particularly preferred embodiment, the apparatus 1100 incorporates the 5 apparatus 900.
Referring now to Figs. l l a- 11 f, an embodiment of an apparatus and method for hanging a tubular liner off of an existing wellbore casing will now be described. As illustrated in Fig. 1 la, a wellbore 1200 is positioned in a subterranean formation 1205.
The wellbore 1200 includes an existing cased section 1210 having a tubular casing 10 1215 and an annular outer layer of cement 1220.
In order to extend the wellbore 1200 into the subterranean formation 1205, a drill string 1225 is used in a well known manner to drill out material from the subterranean formation 1205 to form a new section 1230.
As illustrated in Fig. 11 b, an apparatus 1300 for forming a wellbore casing in a 15 subterranean formation is then positioned in the new section 1230 of the wellbore 100.
The apparatus 1300 preferably includes an expandable mandrel or pig 1305, a tubular member 1310, a shoe 1315, a fluid passage 132O, a fluid passage 1330, a fluid passage 1335, seals 1340, a support member 1345, and a wiper plug 1350.
The expandable mandrel 1305 is coupled to and supported by the support 20 member 1345. The expandable mandrel 1305 is preferably adapted to controllably expand in a radial direction. The expandable mandrel 1305 may comprise any number of conventional commercially available expandable mandrels modified in accordance with the teachings of the present disclosure. In a preferred embodiment, the
expandable mandrel 1305 comprises a hydraulic expansion tool substantially as 25 disclosed in U.S. Pat. No. 5,348,095, the disclosure of which is incorporated herein by
reference, modified in accordance with the teachings of the present disclosure.
The tubular member 1310 is coupled to and supported by the expandable mandrel 1305. The tubular member 1310 is preferably expanded in the radial direction and extruded off of the expandable mandrel 1305. The tubular member 1310 may be 30 fabricated from any number of materials such as, for example, Oilfield Country
Tubular Goods (OCTG), 13 chromium steel tubinJcasing or plastic casing. In a
c preferred embodiment, the tubular member 1310 is fabricated from OCTG. The inner and outer diameters of the tubular member 1310 may range, for example, from approximately 0.75 to 47 inches and 1.05 to 48 inches, respectively. In a preferred embodiment, the inner and outer diameters of the tubular member 13 10 range from 5 about 3 to 15.5 inches and 3.5 to 16 inches, respectively in order to optimally provide minimal telescoping effect in the most commonly encountered wellbore sizes In a preferred embodiment, the tubular member 13 l 0 includes an upper portion 1355, an intermediate portion 1360, and a lower portion 1365. In a preferred embodiment, the wall thickness and outer diameter of the upper portion 1355 of the 10 tubular member 1310 range from about 3/g to 1 7/: inches and 3 './ to 16 inches, respectively. In a preferred embodiment, the wall thickness and outer diameter of the intermediate portion 1360 of the tubular member 1310 range from about 0.625 to 0.75 inches and 3 to 19 inches, respectively. In a preferred embodiment, the wall thickness and outer diameter of the lower portion 1365 of the tubular member 1310 range from 15 about 3/8 to 1.5 inches and 3.5 to 16 inches, respectively.
In a particularly preferred embodiment, the outer diameter of the lower portion 1365 of the tubular member 1310 is significantly less than the outer diameters of the upper and intermediate portions, 1355 and 1360, of the tubular member 1310 in order to optimize the formation of a concentric and overlapping arrangement of wellbore 20 casings. In this manner, as will be described below with reference to Figs. 12 and 13, a wellhead system is optimally provided. In a preferred embodiment, the formation of a wellhead system does not include the use of a hardenable fluidic material.
In a particularly preferred embodiment, the wall thickness of the intermediate section 1360 of the tubular me,.lber] 310 is less than or equal to the wall thickness of 2 5 the upper and lower sections, 1355 and 1365, of the tubular member 1310 in order to optimally facilitate the initiation ofthe extrusion process and optimally permit the placement of the apparatus in areas of the wellbore having tight clearances.
The tubular member l 310 preferably comprises a solid member. In a preferred embodiment, the upper end portion 1355 of the tubular member 1310 is slotted, 30 perforated, or otherwise modified to catch or slow down the mandrel 1305 when it completes the extrusion of tubular member 1310. In a preferred embodiment, the
length of the tubular member I 310 is limited to minimize the possibility of buckling.
For typical tubular member 1310 materials, the length of the tubular member 1310 is preferably limited to between about 40 to 20,000 feet in length.
The shoe l 315 is coupled to the tubular member 1310. The shoe 1315 5 preferably includes fluid passages 1330 and 1335. The shoe 1315 may comprise any number of conventional commercially available shoes such as, for example, Super Seal II float shoe, Super Seal II Down-Jet float shoe or guide shoe with a sealing sleeve for a latch-down plug modified in accordance with the teachings of the present disclosure.
In a preferred embodiment, the shoe 1315 comprises an aluminum down jet guide shoe 10 with a sealing sleeve for a latch-down plug available from Halliburton Energy Services in Dallas, TX, modified in accordance with the teachings ofthe present disclosure, in
order to optimally guide the tubular member 1310 into the wellbore 1200, optimally fluidicly isolate the interior of the tubular member 1310, and optimally permit the complete drill out of the shoe 1315 upon the completion of the extrusion and 15 cementing operations.
In a preferred embodiment, the shoe 1315 farther includes one or more side outlet ports in fluidic communication with the fluid passage 1330. In this manner, the shoe 1315 preferably injects hardenable fluidic sealing material into the region outside the shoe 1315 and tubular member 1310. In a preferred embodiment, the shoe 1315 20 includes the fluid passage 1330 having an inlet geometry that can receive a fluidic sealing member. In this manner, the fluid passage 1330 can be sealed off by introducing a plug, dart and/or ball sealing elements into the fluid passage 1330.
The fluid passage 1320 permits fluidic materials to be transported to and from the interior region of the tubular member 1310 below the expandable mandrel 1305.
25 The fluid passage 1320 is coupled to and positioned within the support member 1345 and the expandable mandrel 1305. The fluid passage 1320 preferably extends from a position adjacent to the surface to the bottom of the expandable mandrel 1305. The fluid passage 1320 is preferably positioned along a centerline of the apparatus 1300.
The fluid passage 1320 is preferably selected to transport materials such as cement, 30 drilling mud, or epoxies at flow rates and pressures ranging from about 0 to 3,000
to W- gallons/minute and O to 9,000 psi in order to optimally provide sufficient operating pressures to circulate fluids at operationally efficient rates.
The fluid passage 1330 permits fluidic materials to be transported to and from the region exterior to the tubular member 1310 and shoe 1315. The fluid passage 1330 5 is coupled to and positioned within the shoe 1315 in fluidic communication with the interior region 1370 of the tubular member 1310 below the expandable mandrel 1305.
The fluid passage 1330 preferably has a cross-sectional shape that permits a plug, or other similar device, to be placed in fluid passage 1330 to thereby block further passage of fluidic materials. In this manner, the interior region 1370 of the tubular 10 member 1310 below the expandable mandrel 1305 can be fluidicly isolated from the region exterior to the tubular member 1310. This permits the interior region 1370 of the tubular member 1310 below the expandable mandrel 1305 to be pressurized. The fluid passage 1330 is preferably positioned substantially along the centerline of the apparatus 1300.
1 5 The fluid passage 1330 is preferably selected to convey materials such as cement, drilling mud or epoxies at How rates and pressures ranging from about O to 3,000 gallons/minute and 0 to 9,000 psi in order to optimally fill the annular region between the tubular member 1310 and the new section 1230 of the wellbore 1200 with fluidic materials. In a preferred embodiment, the fluid passage 1330 includes an inlet 2 0 geometry that can receive a dart and/or a ball sealing member. In this manner, the fluid passage 1330 can be sealed off by introducing a plug, dart andfor ball sealing elements into the fluid passage 1320.
The fluid passage 1335 permits fluidic materials to be transported to and from the region exterior to the tubu] - mcmbe. 1310 and shoe i 3 i 5. T he fluid passage 1335 2 5 is coupled to and positioned within the shoe 1315 in fluidic communication with the fluid passage 1330. The fluid passage 1335 is preferably positioned substantially along the centerline of the apparatus 1300. The fluid passage 1335 is preferably selected to convey materials such as cement, drilling mud or epoxies at flow rates and pressures ranging from about O to 3,000 gallons/minute and 0 to 9,000 psi in order to 30 optimally fill the annular region between the tubular member 1310 and the new section 1230 ofthe wellbore 1200 with fluidic materials.
f . The seals 1340 are coupled to and supported by the upper end portion 1355 of the tubular member 1310. The seals 1340 are further positioned on an outer surface of the upper end portion 1355 of the tubular member 1310. The seals 1340 permit the overlapping joint between the lower end portion of the casing 1215 and the upper 5 portion 1355 of the tubular member 1310 to be fluidicly sealed. The seals 1340 may comprise any number of conventional commercially available seals such as, for example, lead, rubber, Teflon, or epoxy seals modified in accordance with the teachings of the present disclosure. In a preferred embodiment, the seals 1340
comprise seals molded from Stratalock epoxy available from Halliburton Energy 10 Services in Dallas, TX in order to optimally provide a hydraulic seal in the annulus of the overlapping joint while also creating optimal load bearing capability to withstand typical tensile and compressive loads.
In a preferred embodiment, the seals 1340 are selected to optimally provide a sufficient frictional force to support the expanded tubular member 1310 from the 15 existing casing 1215. In a preferred embodiment, the frictional force provided by the seals 1340 ranges from about 1,000 to 1,000,000 lbf in order to optimally support the expanded tubular member 1310.
The support member 1345 is coupled to the expandable mandrel 1305, tubular member 1310, shoe 1315, and seals 1340. The support member 1345 preferably 20 comprises an annular member having sufficient strength to carry the apparatus 1300 into the new section 1230 of the wellbore 1200. In a preferred embodiment, the support member 1345 further includes one or more conventional centralizers (not illustrated) to help stabilize the tubular member 1310.
In a preferred embodiment, the support member 1345 is thoroughly cleaned 2 5 prior to assembly to the remaining portions of the apparatus 1300. In this manner, the introduction of foreign material into the apparatus 1300 is minimized. This minimizes
the possibility of foreign material clogging the various flow passages and valves of the apparatus 1300 and to ensure that no foreign material interferes with the expansion process. 30 The wiper plug 1350 is coupled to the mandrel 1305 within the interior region 370 of the tubular member 1310. The wiper plug 1350 includes a fluid passage 1375
that is coupled to the fluid passage 1320. The wiper plug 1350 may comprise one or more conventional commercially available wiper plugs such as, for example, Multiple Stage Cementer latch-down plugs, Omega latchdown plugs or three-wiper latch-down plug modified in accordance with the teachings of the present disclosure. In a
5 preferred embodiment, the wiper plug 1350 comprises a Multiple Stage Cementer latch-down plug available from Halliburton Energy Services in Dallas, TX modified in a conventional manner for releasable attachment to the expansion mandrel 1305.
In a preferred embodiment, before or after positioning the apparatus 1300 within the new section 1230 of the wellbore 1200, a couple of wellbore volumes are 10 circulated in order to ensure that no foreign materials are located within the wellbore 1200 that might clog up the various flow passages and valves of the apparatus 1300 and to ensure that no foreign material interferes with the extrusion process.
As illustrated in Fig. I l c, a hardenable fluidic sealing material 1380 is then pumped from a surface location into the fluid passage 1320. The material 1380 then 15 passes from the fluid passage 1320, through the fluid passage 1375, and into the interior region 1370 of the tubular member 1310 below the expandable mandrel 1305.
The material 1380 then passes from the interior region 1370 into the fluid passage 1330. The material 1380 then exits the apparatus 1300 via the fluid passage 1335 and fills the annular region 1390 between the exterior of the tubular member 1310 and the 20 interior wall of the new section 1230 of the wellbore 1200. Continued pumping ofthe material 1380 causes the material 1380 to fill up at least a portion ofthe annular region 1390. The material 1380 may be pumped into the annular region 1390 at pressures and flow rates ranging, for example, from about 0 to 5000 psi and n to 1,500 25 gallons/min, respectively. In a preferred embodiment, the material 1380 is pumped into the annular region 1390 at pressures and flow rates ranging from about 0 to 5000 psi and 0 to 1,500 gallons/min, respectively, in order to optimally fill the annular region between the tubular member 1310 and the new section 1230 of the wellbore 1200 with the hardenable fluidic sealing material 1380.
* 30 The hardenable fluidic sealing material 1380 may comprise any number of conventional commercially available hardenable fluidic sealing materials such as, for
o example, slag mix, cement or epoxy. In a preferred embodiment, the hardenable fluidic sealing material 1380 comprises blended cements designed specifically for the well section being drilled and available from Halliburton Energy Services in order to optimally provide support for the tubular member 1310 during displacement of the 5 material 1380 in the annular region 1390. The optimum blend of the cement is preferably determined using conventional empirical methods.
The annular region 1390 preferably is filled with the material 1380 in sufficient quantities to ensure that, upon radial expansion of the tubular member 1310, the annular region 1390 of the new section 1230 of the wellbore 1200 will be filled with 10 material 1380.
As illustrated in Fig. I I d, once the annular region 1390 has been adequately filled with material 1380, a wiper dart 1395, or other similar device, is introduced into the fluid passage 1320. The wiper dart 1395 is preferably pumped through the fluid passage 1320 by a non hardenable fluidic material 1381. The wiper dart 1395 then 15 preferably engages the wiper plug 1350.
As illustrated in Fig. 1 1 e, in a preferred embodiment, engagement of the wiper dart 1395 with the wiper plug 1350 causes the wiper plug 1350 to decouple from the mandrel 1305. The wiper dart 1395 and wiper plug 1350 then preferably will lodge in the fluid passage 1330, thereby blocking fluid flow through the fluid passage 1330, and 2 0 fluidicly isolating the interior region 13 70 of the tubular member 1310 from the annular region 1390. In a preferred embodiment' the non hardenable fluidic material 1381 is then pumped into the interior region 1370 causing the interior region 1370 to pressurize. Once the interior region 1370 becomes sufficiently pressurized, the tubular member 1310 is extruded offofthe expandable mandrel 1305. During the extrusion 2 5 process, the expandable mandrel 1305 is raised out of the expanded portion of the tubular member 1310 by the support member 1345.
The wiper dart 1395 is preferably placed into the fluid passage 1320 by introducing the wiper dart 1395 into the fluid passage 1320 at a surface location in a conventional manner. The wiper dart 1395 may comprise any number of conventional 3 0 commercially available devices from plugging a fluid passage such as, for example' Multiple Stage Cementer latch-down plugs, Omega latch-down plugs or three wiper
\-, - latch-down plug/dart modified in accordance with the teachings of the present disclosure. In a preferred embodiment, the wiper dart 1395 comprises a three wiper
latch-down plug modified to latch and sea] in the Multiple Stage Cementer latch down plug 1350. The three wiper latch-down plug is available from Halliburton Energy 5 Services in Dallas, TX.
ARer blocking the fluid passage 1330 using the wiper plug 1330 and wiper afar 1395, the non hardenable fluidic material 1381 may be pumped into the interior region 1370 at pressures and flow rates ranging, for example, from approximately 0 to 5000 psi and O to 1,500 gallons/min in order to optimally extrude the tubular member 1310 10 off of the mandrel 1305. In this manner, the amoLmt of hardenable Lipidic material within the interior of the tubular member 1310 is minimized.
In a preferred embodiment, after blocking the fluid passage 1330, the non hardenable fluidic material 1381 is preferably pumped into the interior region 1370 at pressures and flow rates ranging from approximately 500 to 9,000 psi and 40 to 3,000 15 gallons/min in order to optimally provide operating pressures to maintain the expansion process at rates sufficient to permit adjustments to be made in operating parameters during the extrusion process.
For typical tubular members 1310, the extrusion of the tubular member 1310 off of the expandable mandrel 1305 will begin when the pressure of the interior region 20 1370 reaches, for example, approximately 500 to 9, 000 psi. In a preferred embodiment, the extrusion of the tubular member 1310 off of the expandable mandrel 1305 is a function of the tubular member diameter, wall thickness of the tubular member, geometry of the mandrel, the type of lubricant, the composition of the shoe and tubular member, Ed the yield strergin of the tubular member. The optimum flow 25 rate and operating pressures are preferably determined using conventional empirical methods. During the extrusion process, the expandable mandrel 1305 may be raised out of the expanded portion of the tubular member 1310 at ratesranging, for example, from about O to 5 ft/sec. In a preferred embodiment, during the extrusion process, the 30 expandable mandrel 1305 may be raised out of the expanded portion of the tubular member 1310 at rates ranging from about 0 to fr/sec in order to optimally provide an
O f efficient process, optimally permit operator adjustment of operation parameters, and ensure optimal completion of the extrusion process before curing of the material 1380.
When the upper end portion 1355 of the tubular member 1310 is extruded off of the expandable mandrel 1305, the outer surface ofthe upper end portion 1355 ofthe 5 tubular member 1310 will preferably contact the interior surface of the lower end portion of the casing 1215 to form an fluid tight overlapping joint. The contact pressure of the overlapping joint may range, for example, from approximately 50 to 20,000 psi. In a preferred embodiment, the contact pressure of the overlapping joint ranges from approximately 400 to 10,000 psi in order to optimally provide contact 10 pressure sufficient to ensure annular sealing and provide enough resistance to withstand typical tensile and compressive loads. In a particularly preferred embodiment, the sealing members 1340 will ensure an adequate fluidic and gaseous seal in the overlapping joint.
In a preferred embodiment, the operating pressure and flow rate of the non 15 hardenable fluidic material 1381is controllably ramped down when the expandable mandrel 1305 reaches the upper end portion 1355 ofthe tubular member 1310. In this manner, the sudden release of pressure caused by the complete extrusion of the tubular member 1310 off of the expandable mandrel 1305 can be minimized. In a preferred embodiment, the operating pressure is reduced in a substantially linear fashion from 2 0 100% to about 10% during the end of the extrusion process beginning when the mandrel 1305 has completed approximately all but about 5 feet ofthe extrusion process. Alternatively, or in combination, a shock absorber is provided in the support member 1345 in order to absorb the shock caused by the sudden release of pressure.
2 5 Alternatively, or in combination, a mandrel catching structure is provided in the upper end portion 1355 of the tubular member 1310 in order to catch or at least decelerate the mandrel 1305.
Once the extrusion process is completed, the expandable mandrel 1305is removed from the wellbore 1200. In a preferred embodiment, either before or after the 30 removal ofthe expandable mandrel 1305, the integrity of the fluidic seal of the overlapping joint between the upper portion 1355 of the tubular member 1310 and the
oC lower portion of the casing 1215 is tested using conventional methods. If the fluidic seal of the overlapping joint between the upper portion 1355 of the tubular member 1310 and the lower portion of the casing 1215 is satisfactory, then the uncured portion ofthe material 1380 within the expanded tubular member 1310 is then removed in a 5 conventional manner. The material 1380 within the annular region 1390 is then allowed to cure As illustrated in Fig. 1 If, preferably any remaining cured material 1380 within the interior of the expanded tubular member 1310 is then removed in a conventional manner using a conventional drill string. The resulting new section of casing 1400 10 includes the expanded tubular member 1310 and an outer annular layer 1405 of cured material 305. The bottom portion of the apparatus 1300 comprising the shoe 1315 may then be removed by drilling out the shoe 1315 using conventional drilling methods.
Referring now to Figs. 12 and 13, a preferred embodiment of a wellhead system 1500 formed using one or more of the apparatus and processes described above with 1 reference to Figs. 1 - 11 f will be described. The wellhead system 1500 preferably includes a conventional Christmas tree/drilling spool assembly 1505, a thick wall casing 1510, an annular body of cement 1515, an outer casing 1520, an annular body of cement 1525, an intermediate casing 1530, and an inner casing 1535.
The Christmas tree/drilling spool assembly 1505 may comprise any number of 20 conventional Christmas tree/drilling spool assemblies such as, for example, the SS- 15 Subsea Wellhead System, Spool Tree Subsea Production System or the Compact Wellhead System available from suppliers such as Dril-Quip, Cameron or Breda, modified in accordance with the teachings of the present disclosure. The dri fling spool
assembly 1505 is preferably operably coupled to the thick wall casing i 51 U and/or the 2 5 outer casing 1520. The assembly 1505 may be coupled to the thick wall casing 1510 and/or outer casing 1520, for example, by welding, a threaded connection or made from single stock. In a preferred embodiment, the assembly 1505 is coupled to the thick wall casing 1510 and/or outer casing 1520 by welding.
The thick wall casing 1510 is positioned in the upper end of a wellbore 1540.
30 In a preferred embodiment' at least a portion of the thick wall casing 1510 extends above the surface 1545 in order to optimally provide easy access and attachment to the
Lo C- JO / ',
Christmas tree/drilling spool assembly 1505. The thick wall casing 1510 is preferably coupled to the Christmas tree/drilling spool assembly 1505, the annular body of cement 1515, and the outer casing 1520.
The thick wall casing 1510 may comprise any number of conventional 5 commercially available high strength wellbore casings such as, for example, Oilfield
Country Tubular Goods, titanium tubing or stainless steel tubing. In a preferred embodiment, the thick wall casing 1510 comprises Oilfeld Country Tubular Goods available from various foreign and domestic steel mills. In a preferred embodiment, the thick wall casing 1510 has a yield strength of about 40,000 to 135,000 psi in order 10 to optimally provide maximum burst, collapse, and tensile strengths. In a preferred embodiment, the thick wall casing 1510 has a failure strength in excess of about S, 000 to 20,000 psi in order to optimally provide maximum operating capacity and resistance to degradation of capacity after being drilled through for an extended time period.
The annular body of cement 1515 provides support for the thick wall casing 15 l 5 l 0. The annular body of cement 1515 may be provided using any number of conventional processes for forming an annular body of cement in a wellbore. The annular body of cement 1515 may comprise any number of conventional cement mixtures. The outer casing 1520 is coupled to the thick wall casing 1510. The outer 2 0 casing l 520 may be fabricated from any number of convcutional commercially available tubular members modified in accordance with the teachings of the present disclosure. In a preferred embodiment, the outer casing 1520 comprises any one of the
expandable tubular members described above with reference to Figs. 1-1 I f.
In a preferred embodiment, the outer casing 1520 is coupled to the thick wall 2 5 casing 1510 by expanding the outer casing 1520 into contact with at least a portion of the interior surface of the thick wall casing 1510 using any one of the embodiments of the processes and apparatus described above with reference to Figs. 1-1 1 f. In an alternative embodiment, substantially all of the overlap of the outer casing 1520 with the thick wall casing 1510 contacts with the interior surface of the thick wall casing 30 1510.
c The contact pressure of the interface between the outer casing 1520 and the thick wall casing 1510 may range, for example, from about 500 to 10, 000 psi. In a preferred embodiment, the contact pressure between the outer casing 1520 and the thick wall casing 1510 ranges from about 500 to 10,000 psi in order to optimally 5 activate the pressure activated sealing members and to ensure that the overlapping joint will optimally withstand typical extremes of tensile and compressive loads that are experienced during drilling and production operations.
As illustrated in Fig. 13, in a particularly preferred embodiment, the upper end of the outer casing 1520 includes one or more sealing members 1550 that provide a 10 gaseous and fluidic seal between the expanded outer casing 1520 and the interior wall of the thick wall casing 1510. The sealing members 1550 may comprise any number of conventional commercially available seals such as, for example, lead, plastic, rubber, Teflon or epoxy modified in accordance with the teachings of the present disclosure. In a preferred embodiment, the sealing members 1550 comprise seals
15 molded from StrataLock epoxy available from Halliburton Energy Services in order to optimally provide an hydraulic seal and a load bearing interference fit between the tubular members. In a preferred embodiment, the contact pressure of the interface between the thick wall casing 1510 and the outer casing 1520 ranges from about 500 to 10,000 psi in order to optimally activate the sealing members 1550 and also optimally O ensure that the joint will withstand the typical operating extremes of tensile and compressive loads during drilling and production operations.
In an alternative preferred embodiment, the outer casing 1520 and the thick walled casing 1510 are combined in one unitary member.
The annular body of cement 1525 provides support for the outer casing 1520.
2 5 In a preferred embodiment, the annular body of cement 1525 is provided using any one of the embodiments of the apparatus and processes described above with reference to Figs. 1-llf.
The intermediate casing 1530 may be coupled to the outer casing 1520 or the thick wall casing 1510. In a preferred embodiment, the intermediate casing 1530 is 30 coupled to the thick wal! casing 1510. The intermediate casing 1530 may be fabricated from any number of conventional commercially available tubular members modified in
To accordance with the teachings of the present disclosure. In a preferred embodiment,
the intermediate casing 1530 comprises any one of the expandable tubular members described above with reference to Figs. 1-1 I f.
In a preferred embodiment, the intermediate casing 1530 is coupled to the thick 5 wall casing 1510 by expanding at least a portion of the intermediate casing 1530 into contact with the interior surface of the thick wall casing 1510 using any one of the processes and apparatus described above with reference to Figs. I -1 1 f. In an alternative preferred embodiment, the entire length of the overlap of the intermediate casing 1530 with the thick wall casing 1510 contacts the inner surface of the thick wall 10 casing 1510. The contact pressure of the interface between the intermediate casing 1530 and the thick wall casing 1510 may range, for example from about 500 to 10,000 psi. In a preferred embodiment, the contact pressure between the intermediate casing l 530 and the thick wall casing 1510 ranges from about 500 to 10, 000 psi in order to optimally activate the pressure activated sealing members and to optimally ensure that 15 the joint will withstand typical operating extremes of tensile and compressive loads experienced during drilling and production operations.
As illustrated in Fig. 13, in a particularly preferred embodiment, the upper end of the intermediate casing 1530 includes one or more sealing members 1560 that provide a gaseous and fluidic seal between the expanded end of the intermediate casing 2 0 1530 and the interior wall of the thick wall casing 1510. The sealing members 1560 may comprise any number of conventional commercially available seals such as, for example, plastic, lead, rubber, Teflon or epoxy, modified in accordance with the teachings of the present disclosure. In a preferred embodiment, the sealing members
1560 comprise seals molded from StrataIock epoxy available from Halliburton Energy 2 5 Services in order to optimally provide a hydraulic seal and a load bearing interference fit between the tubular members.
In a preferred embodiment, the contact pressure of the interface between the expanded end of the intermediate casing 1530 and the thick wall casing 1510 ranges from about 500 to 10,000 psi in order to optimally activate the sealing members 1560 3 0 and also optimally ensure that the joint will withstand typical operating extremes of
c l tensile and compressive loads that are experienced during drilling and production operations. The inner casing 1535 may be coupled to the outer casing 1520 or the thick wall casing 1510. In a preferred embodiment, the inner casing 1535 is coupled to the 5 thick wall casing 1510. The inner casing 1535 may be fabricated from any number of conventional commercially available tubular members modified in accordance with the teachings of the present disclosure. In a preferred embodiment, the inner casing 1535
comprises any one of the expandable tubular members described above with reference to rigs. 1-llf.
1 C In a preferred embodiment, the inner casing 1 S35 is coupled to the outer casing 1520 by expanding at least a portion of the inner casing 1535 into contact with the interior surface of the thick wall casing 1510 using any one of the processes and apparatus described above with reference to Figs. I - 1 I f. In an alternative preferred embodiment' the entire length of the overlap of the inner casing 1535 with the thick 15 wall casing 1510 and intermediate casing 1530 contacts the inner surfaces ofthe thick wall casing 1510 and intermediate casing 1530. The contact pressure of the interface between the inner casing 1535 and the thick wall casing 1510 may range, for example from about 500 to 10,000 psi. In a preferred embodiment, the contact pressure between the inner casing 1535 and the thick wall casing 1510 ranges from about 500 to 2 0 10,000 psi in order to optimally activate the pressure activated sealing members and to ensure that the joint will withstand typical extremes of tensile and compressive loads that are commonly experienced during drilling and production operations. As illustrated in Fig. 13, in a particularly preferred embodiment, the upper end of the inner casing 1535 includes one or more sealing members 1570 that provide a gaseous and 2 5 fluidic seal between the expanded end of the inner casing 1535 and the interior wall of the thick wall casing 1510. The sealing members 1570 may comprise any number of conventional commercially available seals such as, for example, lead, plastic, rubber, Teflon or epoxy, modified in accordance with the teachings of the present disclosure.
In a preferred embodiment, the sealing members 1570 comprise seals molded from 30 StrataLock epoxy available from Halliburton Energy Services in order to optimally provide an hydraulic seal and a load bearing interference fit. In a preferred
to C- embodiment, the contact pressure of the interface between the expanded end of the inner casing 1535 and the thick wall casing 1510 ranges from about 500 to 10,000 psi in order to optimally activate the sealing members 1570 and also to optimally ensure that the joint will withstand typical operating extremes of tensile and compressive 5 loads that are experienced during drilling and production operations.
In an alternative embodiment, the inner casings, 1520, 1530 and 1535, may be coupled to a previously positioned tubular member that is in turn coupled to the outer casing 1510. More generally, the present preferred embodiments may be used to form a concentric arrangement of tubular members.
10 Referring now to Figures 14a, 14b, 14c, 14d, 14e and 14f, a preferred embodiment of a method and apparatus for forming a mono-diameter well casing within a subterranean formation will now be described.
As illustrated in Fig.14a, a wellbore 1600 is positioned in a subterranean formation 1605. A first section of casing 1610 is formed in the wellbore 1600. The 15 first section of casing 1610 includes an annular outer body of cement 1615 and a tubular section of casing 1620. The first section of casing 1610 may be formed in the wellbore 1600 using conventional methods and apparatus. In a preferred embodiment, the first section of casing 1610 is formed using one or more of the methods and apparatus described above with reference to Figs. 1-13 or below with reference to Figs. 20 14b-17b. The annular body of cement 1615 may comprise any number of conventional commercially available cement, or other load bearing, compositions. Alternatively, the body of cement 1615 may be omitted or replaced with an epoxy mixture.
The tubular section of casing 1620 preferably includes an upper end 1625 and a 25 lower end 1630. Preferably, the lower end 1625 of the tubular section of casing 1620 includes an outer annular recess 1635 extending from the lower end 1630 of the tubular section of casing 1620. In this manner, the lower end 1625 of the tubular section of casing 1620 includes a thin walled section 1640. In a preferred embodiment, an annular body 1645 of a compressible material is coupled to and at 30 least partially positioned within the outer annular recess 1635. In this manner, the
o body of compressible material 1645 surrounds at least a portion of the thin walled section 1640.
The tubular section of casing 1620 may be fabricated from any number of conventional commercially available materials such as, for example, oilfield country
5 tubular goods' stainless steel, automotive grade steel, carbon steel, low alloy steel, fiberglass or plastics. In a preferred embodiment, the tubular section of casing 1620 is fabricated from oilfield country tubular goods available from various foreign and
domestic steel mills. The wall thickness of the thin walled section 1640 may range from about 0.125 to 1.5 inches. In a preferred embodiment, the wall thickness of the 10thin walled section l 640 ranges from 0.25 to l.O inches in order to optimally provide burst strength for typical operational conditions while also minimizing resistance to radial expansion. The axial length of the thin walled section 1640 may range from about 120 to 2400 inches. In a preferred embodiment, the axial length of the thin walled section 1640 ranges from about 240 to 480 inches.
15The annular body of compressible material 1645 helps to minimize the radial force required to expand the tubular casing 1620 in the overlap with the tubular member 1715, helps to create a fluidic seal in the overlap with the tubular member 1715, and helps to create an interference fit sufficient to permit the tubular member 1715 to be supported by the tubular casing 1620. The annular body of compressible 2 0 material 1645 may comprise any number of commercially available compressible materials such as, for example, epoxy, rubber, Teflon, plastics or lead tubes. In a preferred embodiment, the annular body of compressible material 1645 comprises StrataLock epoxy available from Halliburton Energy Services in order to optimally provide an hydraulic seal in the overlapped joint while also having compliance to 25 thereby minimize the radial force required to expand the tubular casing. The wall thickness of the annular body of compressible material 1645 may range from about 0.05 to 0.75 inches. In a preferred embodiment, the wall thickness of the annular body of compressible material 1645 ranges from about 0.1 to 0.5 inches in order to optimally provide a large compressible zone, minimize the radial forces required to 30 expand the tubular casing, provide thickness for casing strings to provide contact with the inner surface of the wellkore upon radial expansion, and provide an hydraulic seal.
Gf As illustrated in Fig. 14b, in order to extend the wellbore 1600 into the subterranean formation 1605, a drill string is used in a well known manner to drill out material from the subterranean formation 1605 to form a new wellbore section 1650.
The diameter of the new section 1650 is preferably equal to or greater than the inner 5 diameter of the tubular section of casing 1620.
As illustrated in Fig. 14c, a preferred embodiment of an apparatus 1700 for forming a mono-diameter wellbore casing in a subterranean formation is then positioned in the new section 1650 ofthe wellbore 1600. The apparatus 1700 preferably includes a support member 1705, an expandable mandrel or pig 1710, a 10 tubular member 1715, a shoe 1720, slips 1725, a fluid passage 1730, one or more fluid passages 1735, a fluid passage 1740, a first compressible annular body 1745, a second compressible annular body 1750, and a pressure chamber 1755.
The support member 1705 supports the apparatus 1700 within the wellbore 1600. The support member 1705 is coupled to the mandrel 1710, the tubular member 15 1715, the shoe 1720, and the slips 1725. The support member 1075 preferably comprises a substantially hollow tubular member. The fluid passage 1730 is positioned within the support member 1705. The fluid passages 1735 fluidicly couple the fluid passage 1730 with the pressure chamber 1755. The fluid passage 1740 fluidicly couples the fluid passage 1730 with the region outside of the apparatus 1700.
O The support member 1705 may be fabricated from any number of conventional commercially available materials such as, for example, oilfield country tubular goods,
stainless steel, low alloy steel, carbon steel, 13 chromium steel, fiberglass, or other high strength materials. In a preferred embodiment, the support member 1705 is fabricated from oil field country tubular goods available from various foreign and
2 5 domestic steel mills in order to optimally provide operational strength and facilitate the use of other standard oil exploration handling equipment. In a preferred embodiment, at least a portion of the support member 1705 comprises coiled tubing or a drill pipe.
In a particularly preferred embodiment, the support member 1705 includes a load shoulder 1820 for supporting the mandrel 1710 when the pressure chamber 1755 is 30 unpressurized.
The mandrel 1710 is supported by and slidingly coupled to the support member 1705 and the shoe 1720. The mandrel 1710 preferably includes an upper portion 1760 and a lower portion 1765. Preferably, the upper portion l 760 of the mandrel 17 l O and the support member 1705 together define the pressure chamber 1755. Preferably, the 5 lower portion 1765 of the mandrel 1710 includes an expansion member 1770 for radially expanding the tubular member 1715.
In a preferred embodiment, the upper portion 1760 of the mandrel 1710 includes a tubular member 1775 having an inner diameter greater than an outer diameter of the support member 1705. In this manner, an armular pressure chamber 10 1755 is defined by and positioned between the tubular member 1775 and the support member 1705. The top 1780 of the tubular member 1775 preferably includes a bearing and a seal for sealing and supporting the top 1780 of the tubular member 1775 against the outer surface of the support member 1705. The bottom 1785 of the tubular member 1775 preferably includes a bearing and seal for sealing and supporting the 1 bottom 1785 of the tubular member 1775 against the outer surface of the support member 1705 or shoe 1720. In this manner, the mandrel 17 l 0 moves in an axial direction upon the pressurization of the pressure chamber 1755.
The lower portion 1765 of the mandrel 1710 preferably includes an expansion member 1770 for radially expanding the tubular member 1715 during the 2 0 pressurization of the pressure chamber 1755. In a preferred embodiment, the expansion member is expandable in the radial direction. In a preferred embodiment, the inner surface of the lower portion 1765 of the mandrel 1710 mates with and slides with respect to the outer surface of the shoe 1720. The outer diameter of the expansion member 1770 may range from about 90 to i 00 % of the inner diai-neter of the tubule 2 5 casing 1620. In a preferred embodiment, the outer diameter of the expansion member 1770 ranges from about 95 to 99 % of the inner diameter of the tubular casing 1620.
The expansion member 1770 may be fabricated from any number of conventional commercially available materials such as, for example, machine tool steel, ceramics, tungsten carbide, titanium or other high strength alloys. In a preferred embodiment, 3 0 the expansion member 1770 is fabricated from D2 machine tool steel in order to optimally provide high strength and abrasion resistance.
O, The tubular member 1715 is coupled to and supported by the support member 1705 and slips 1725. The tubular member 1715 includes an upper portion 1790 and a lower portion 1795.
The upper portion 1790 of the tubular member 17 l 5 preferably includes an 5 inner annular recess 1800 that extends from the upper portion 1790 of the tubular member 1715. In this manner, at least a portion of the upper portion 1790 of the tubular member 1715 includes a thin walled section 1805. The first compressible annular member 1745 is preferably coupled to and supported by the outer surface of the upper portion 1790 of the tubular member 1715 in opposing relation to the thin 1 0 wall section 1805.
The lower portion 1795 of the tubular member l 715 preferably includes an outer annular recess 1810 that extends from the lower portion 1790 of the tubular member 1715. In this manner, at least a portion of the lower portion 1795 of the tubular member 1715 includes a thin wal led section 1815. The second compressible 1 5 annular member 1750 is coupled to and at least partially supported within the outer annular recess 1810 of the upper portion 1790 of the tubular member 1715 in opposing relation to the thin wall section l 15.
The tubular member 1715 may be fabricated from any number of conventional commercially available materials such as, for example, oilfield country tubular goods,
2 0 stainless steel, low alloy steel, carbon steel, automotive grade steel, fiberglass, 13 chrome steel, other high strength material, or high strength plastics. In a preferred embodiment, the tubular member 1715 is fabricated from oilfield country tubular
goods available from various foreign and domestic steel mills in order to optimally provide operational strength.
2 5 The shoe 1720 is supported by and coupled to the support member 1705. The shoe 1720 preferably comprises a substantially hollow tubular member. In a preferred embodiment, the wall thickness of the shoe 1720 is greater than the wall thickness of the support member 1705 in order to optimally provide increased radial support to the mandrel 1710. The shoe 1720 may be fabricated from any number of conventional 3 0 commercially available materials such as, for example, oilfield country tubular goods,
stainless steel, automotive grade steel, low alloy steel, carbon steel, or high strength
o plastics. In a preferred embodiment, the shoe 1720 is fabricated from oilfield country
tubular goods available from various foreign and domestic steel mills in order to optimally provide matching operational strength throughout the apparatus.
The slips 1725 are coupled to and supported by the support member 1705. T he 5 slips 1725 removably support the tubular member 1715. In this manner, during the radial expansion of the tubular member 1715, the slips 1725 help to maintain the tubular member 1715 in a substantially stationary position by preventing upward movement of the tubular member 1715.
The slips 1725 may comprise any number of conventional commercially 1 0 available slips such as, for example, RTTS packer tungsten carbide mechanical slips, RTTS packer wicker type mechanical slips, or l\4odel 3L retrievable bridge plug tungsten carbide upper mechanical slips. In a preferred embodiment, the slips 1725 comprise RTTS packer tungsten carbide mechanical slips available from Halliburton Energy Services. In a preferred embodiment, the slips 1725 are adapted to support 1 5 axial forces ranging from about 0 to 750,000 Ibf.
The fluid passage 1730 conveys fluidic materials from a surface location into the interior of the support member 1705, the pressure chamber 1755, and the region exterior of the apparatus 1700. The fluid passage 1730 is fluidicly coupled to the pressure chamber 1755 by the fluid passages I 735. The fluid passage 1730 is fluidicly 2 0 coupled to the regionexterior to the apparatus 1700 by the fluid passage 1740.
In a preferred embodiment, the fluid passage 1730 is adapted to convey iluidic materials such as, for example, cement, epoxy, drilling muds, slag mix, water or drilling gasses. In a preferred embodiment, the fluid passage 1730 is adapted to convey Druidic materials at flow rate and pressures ranging frontal, about O to 3,uOO 5 gallons/minute and 0 to 9, 000 psi. in order to optimally provide flow rates and operational pressures for the radial expansion processes.
The fluid passages 1735 convey fluidic material from the fluid passage 1730 to the pressure chamber 1755. In a preferred embodiment, the fluid passage 1735 is adapted to convey fluidic materials such as, for example, cement, epoxy, drilling muds, 3 0 water or drilling gasses. In a preferred embodiment, the fluid passage 1735 is adapted to convey fluidic materials at flow rate and pressures ranging from about O to 500 S4
o gallons/minute and O to 9,000 psi. in order to optimally provide operating pressures and flow rates for the various expansion processes.
The fluid passage 1740 conveys fluidic materials from the fluid passage 1730 to the region exterior to the apparatus 1700. In a preferred embodiment, the fluid passage 5 1740 is adapted to convey fluidic materials such as, for example, cement, epoxy, drilling muds, water or drilling gasses. In a preferred embodiment, the fluid passage 1740 is adapted to convey fluidic materials at flow rate and pressures ranging from about O to 3,000 gallons/minute and 0 to 9,000 psi. in order to optimally provide operating pressures and flow rates for the various radial expansion processes.
10 In a preferred embodiment, the fluid passage 1740 is adapted to receive a plug or other similar device for sealing the fluid passage 1740. In this manner, the pressure chamber 1755 may be pressurized.
The first compressible annular body 1745 is coupled to and supported by an exterior surface of the upper portion 1790 of the tubular member 1715. In a preferred 15 embodiment, the first compressible annular body 1745 is positioned in opposing relation to the thin walled section 18.05 of the tubular member 1715.
The first compressible annular body 1745 helps to minimize the radial force required to expand the tubular member 17] 5 in the overlap with the tubular casing 1620, helps to create a fluidic seal in the overlap with the tubular casing 1620, and 2 0 helps to create an interference fit sufficient to permit the tubular member 1715 to be supported by the tubular casing 1620. The first compressible annular body 1745 may comprise any number of commercially available compressible materials such as, for example, epoxy, rubber, Teflon, plastics, or hollow lead tubes. In a preferred embodiment, the first compressible annular body 1745 comprises StrataLock epoxy 2 5 available from Halliburton Energy Services in order to optimally provide an hydraulic seal, and compressibility to minimize the radial expansion force.
The wall thickness of the first compressible annular body 1745 may range from about 0.05 to 0.75 inches. In a preferred embodiment, the wall thickness of the first compressible annular body 1745 ranges from about 0. 1 to 0.5 inches in order to 30 optimally (1) provide a large compressible zone, (2) minimize the required radial expansion force, (3) transfer the radial force to the tubular casings. As a result. in a
oC preferred embodiment, overall the outer diameter of the tubular member 1715 is approximately equal to the overall inner diameter of the tubular member 1620.
The second compressible annular body 1750 is coupled to and at least partially supported within the outer annular recess 1810 of the tubular member 1715. In a 5 preferred embodiment' the second compressible annular body 1750 is positioned in opposing relation to the thin walled section 1815 of the tubular member 1715* The second compressible annular body 1750 helps to minimize the radial force required to expand the tubular member 1715 in the overlap with another tubular member, helps to create a fluidic seal in the overlap of the tubular member l 715 with 10 another tubular member, and helps to create an interference fit sufficient to permit another tubular member to be supported by the tubular member 1715. The second compressible annular body 1750 may comprise any number of commercially available compressible materials such as, for example, epoxy, rubber, Al eflon, plastics or hollow lead tubing. In a preferred embodiment, the first compressible annular body 1750 15 comprises StrataLock epoxy available from Halliburton Energy Services in order to optimally provide an hydraulic seal in the overlapped joint, and compressibility that minimizes the radial expansion force.
The wall thickness of the second compressible annular body 1750 may range from about 0.05 to 0.75 inches. In a preferred embodiment, the wall thickness of the 2 0 second compressible annular body 1750 ranges from about 0.1 to 0.5 inches in order to optimally provide a large compressible zone, and minimize the radial force required to expand the tubular member 1715 during subsequent radial expansion operations.
In an alternative embodiment, the outside diameter of the second compressible annular body! 750 is adapted to provide a seal against the surrounding formation 2 5 thereby eliminating the need for an outer annular body of cement.
The pressure chamber 1755 is fluidicly coupled to the fluid passage 1730 by the fluid passages 735. The pressure chamber 1755 is preferably adapted to receive fluidic materials such as, for example, drilling muds, water or drilling gases. In a preferred embodiment, the pressure chamber 1755 is adapted to receive fluidic 30 materials at flow rate and pressures ranging from about 0 to 500 gallons/minute and 0 to 9,000 psi. in order to optimally provide expansion pressure. In a preferred
on embodiment, during pressurization of the pressure chamber 1755, the operating pressure of the pressure chamber ranges from about O to 5,000 psi in order to optimally provide expansion pressure while minimizing the possibility of a catastrophic failure due to over pressurization.
5 As illustrated in Fig. 14d, the apparatus 1700 is preferably positioned in the wellbore 1600 with the tubular member 1715 positioned in an overlapping relationship with the tubular casing 1620. In a particularly preferred embodiment, the thin wall sections, 1640 and 1805, of the tubular casing 1620 and tubular member 1725 are positioned in opposing overlapping relation. In this manner, the radial expansion of 1 0 the tubular member 1725 will compress the thin wall sections, 1640 and I 805, and annular compressible members, 1645 and 1745, into intimate contact.
After positioning of the apparatus 1700, a fluidic material 1825 is then pumped into the fluid passage 1730. The fluidic material 1825 may comprise any number of conventional commercially available materials such as, for example, water, drilling 15 mud, drilling gases, cement or epoxy. In a preferred embodiment, the fluidic material 1825 comprises a hardenable fluidic sealing material such as, for example, cement in order to provide an outer annular body around the expanded tubular member 1715.
The fluidic material 1825 may be pumped into the fluid passage 1730 at operating pressures and flow rates, for example, ranging from about O to 9,000 psi and 20 0 to 3,000 gallons/minute.
The fluidic material 1825 pumped into the fluid passage 1730 passes through the fluid passage 1740 and outside of the apparatus 1700. The fluidic material 1825 fills the annular region 1830 between the outside of the apparatus 1700 and the interior walls of the wellbore 1600.
25 As illustrated in Fig. 14e, a plug 1835 is then introduced into the fluid passage 1730. The plug 1835 lodges in the inlet to the fluid passage 1740 fluidicly isolating and blocking off the fluid passage 1730.
A fluidic material 1840 is then pumped into the fluid passage 1730. The fluidic material 1840 may comprise any number of conventional commercially available 30 materials such as, for example, water, drilling mud or drilling gases. In a preferred embodiment, the fluidic material 1825 comprises a non-hardenable fluidic material
of such as, for example, drilling mud or drilling gases in order to optimally provide pressurization of the pressure chamber 1755.
The iluidic material 1840 may be pumped into the fluid passage 1730 at operating pressures and flow rates ranging, for example, from about O to 9,000 psi and 5 0 to SOD gallons/minute. In a preferred embodiment, the fluidic material 1840 is purnged into the fluid passage 1730 at operating pressures and flow rates ranging from about 500 to S,OOO psi and O to SOD gallons/minute in order to optimally provide operating pressures and flow rates for radial expansion.
The fluidic material 1840 pumped into the fluid passage 1730 passes through 1 0 the fluid passages 1735 and into the pressure chamber! 755. Continued pumping of the fluidic material 1840 pressurizes the pressure chamber 1755. The pressurization of the pressure chamber 1 755 causes the mandrel 1710 to move relative to the support member 1705 in the direction indicated by the arrows 1845. In this manner, the mandrel 1710 will cause the tubular member 1715 to expand in the radial direction.
1 5 During the radial expansion process, the tubular member 1715 is prevented from moving in an upward direction by the slips 1725. A length of the tubular member 1 715 is then expanded in the radial direction through the pressurization of the pressure chamber 1 755. The length of the tubular member 1715 that is expanded during the expansion process will be proportional to the stroke length ofthe mandrel 1710. Upon 2 0 the completion of a stroke, the operating pressure of the pressure chamber 1755 is then reduced and the mandrel 1710 drops to it rest position with the tubular member 1715 supported by the mandrel 1 715. The position of the support member 1705 may be adjusted throughout the radial expansion process in order to maintain the overlapping relationship between the thin wailed sections, 1640 and 1805' of the tubular casing 2 5 1620 and tubular member 1715. The stroking of the mandrel 1710 is then repeated, as necessary, until the thin walled section 1805 of the tubular member 1715 is expanded into the thin walled section 1640 of the tubular casing 1620.
In a preferred embodiment, during the final stroke ofthe mandrel 1710, the slips 1725 are positioned as close as possible to the thin walled section 1805 of the 3 0 tubular member 1715 in order minimize slippage between the tubular member 1 7! 5 and tubular casing 1620 at the end of the radial expansion process. Alternatively, or in
c addition, the outside diameter of the first compressive annular member 1745 is selected to ensure sufficient interference fit with the tubular casing 1620 to prevent axial displacement of the tubular member 1715 during the final stroke. Alternatively, or in addition, the outside diameter of the second compressive annular body l 750 is large 5 enough to provide an interference fit with the inside walls of the wellbore 1600 at an earlier point in the radial expansion process so as to prevent further axial displacement of the tubular member 1715. In this final alternative, the interference fit is preferably selected to permit expansion of the tubular member 1715 by pulling the mandrel l 710 out of the wellbore 1 60O, without having to pressurize the pressure chamber 1755.
10 During the radial expansion process, the pressurized areas of the apparatus 1700 are limited to the fluid passages 1730 within the support member 1705 and the pressure chamber 1755 within the mandrel I 7 l 0. No fluid pressure acts directly on the tubular member 1715. This permits the use of operating pressures higher than the tubular member 1715 could normally withstand.
15 Once the tubular member 1715 has been completely expanded off of the mandrel 1 710, the support member 1 705 and mandrel 1710 are removed from the wellbore 1600. In a preferred embodiment, the contact pressure between the deformed thin wall sections, 1640 and 1805, and compressible annular members, 1645 and l 745, ranges from about 400 to 10,000 psi in order to optimally support the tubular member 2 0 1715 using the tubular casing l 620.
In this manner, the tubular member 171 5 is radially expanded into contact with the tubular casing 1620 by pressurizing the interior of the fluid passage l 730 and the pressure chamber 1755.
As illustrated in Fig. 14f, in a preferred embodiment, once the tubular member 2 5 l 715 is completely expanded in the radial direction by the mandrel l 710, the support member 1705 and mandrel 1710 are removed from the wellbore 1600. In a preferred embodiment, the annular body of hardenable fluidic material is then allowed to cure to form a rigid outer annular body 1850. In the case where the tubular member 1715 is slotted, the hardenable fluidic material will preferably permeate and envelop the 3 0 expanded tubular member 1 715.
o The resulting new section of wellbore casing 1855 includes the expanded tubular member 1715 and the rigid outer annular body 1850. The overlapping joint 1860 between the tubular casing 1620 and the expanded tubular member 1715 includes the deformed thin wall sections, 1640 and 1805, and the compressible annular bodies, 5 1645 and 1745. The inner diameter of the resulting combined wellbore casings is substantially constant. In this manner, a mono-diameter wellbore casing is formed.
This process of expanding overlapping tubular members having thin wall end portions with compressible annular bodies into contact can be repeated for the entire length of a wellbore. In this manner, a mono- diameter wellbore casing can be provided for 1 0 thousands of feet in a subterranean formation.
Referring now to Figures 15, 1 Sa and 15b, an embodiment of an apparatus 1900 for expanding a tubular member will be described. The apparatus 1900 preferably includes a drillpipe 1905, an innerstring adapter 1910, a sealing sleeve 1915, an inner sealing mandrel 1920, an upper sealing head 1925, a lower sealing head 1930, an outer 1 5 sealing mandrel 1935, a load mandrel] 940, an expansion cone 1945, a mandrel launcher 1950, a mechanical slip body 1955, mechanical slips 1960, drag blocks 1965, casing 1970, and fluid passages 1975, 1980, 1985, and 1990.
The drillpipe 1905 is coupled to the innerstring adapter 1910. During operation of the apparatus 1900, the drillpipe 1905 supports the apparatus 1900. The drillpipe 2 0 1905 preferably comprises a substantially hollow tubular member or members. The drillpipe 1905 may be fabricated from any number of conventional commercially available materials such as, for example, oilfield country tubular drillpipe, fiberglass or
coiled tubing. In a preferred embodiment, the drillpipe 1905 is fabricated from coiled tubing in order to facilitate the placement of the apparatus 1900 in non-vertical 25 wellbores. The drillpipe 1905 may be coupled to the innerstring adapter 1910 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connectors, OCTG specialty type box and pin connectors, a ratchets latch type connector or a standard box by pin connector. In a preferred embodiment, the drillpipe 1905 is removably coupled to the innerstring adapter 1910 by a drillpipe 30 connection.
o The drillpipe l90S preferably includes a fluid passage 1975 that is adapted to convey fluidic materials from a surface location into the fluid passage 1980. In a preferred embodiment, the fluid passage 1975 is adapted to convey fluidic materials such as, for example, cement, drilling mud, epoxy or lubricants at operating pressures 5 and flow rates ranging from about 0 to 9,000 psi and 0 to 3,000 gallons/minute.
The innerstring adapter 1910 is coupled to the drill string 1905 and the sealing sleeve 1915. The innerstring adapter 1910 preferably comprises a substantially hollow tubular member or members. The innerstring adapter 1910 may be fabricated from any number of conventional commercially available materials such as, for example, oil 10 country tubular goods, low alloy steel, carbon steel, stainless steel or other high strength materials. In a preferred embodiment, the innerstring adapter 1910 is fabricated from oilfield country tubular goods in order to optimally provide mechanical
properties that closely match those of the drill string 1905.
The innerstring adapter 1910 may be coupled to the drill string 1905 using any 15 number of conventional commercially available mechanical couplings such as, for example, drillpipe connectors, oilfield country tubular goods specialty type threaded
connectors, ratchet-latch type stab in connector, or a standard threaded connection. In a preferred embodiment, the innerstring adapter 1910 is removably coupled to the drill pipe 1905 by a drillpipe connection. The innerstring adapter 1910 may be coupled to 2 0 the sealing sleeve 1915 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfield country
tubular goods specialty type threaded connector, ratchet-latch type stab in connectors, or a standard threaded connection. In a preferred embodiment, the innerstring adapter 1910 is removably coupled to the sealing sleeve 1915 by a standard threaded 2 5 connection.
The innerstring adapter 1910 preferably includes a fluid passage 1980 that is adapted to convey fluidic materials from the fluid passage 1975 into the fluid passage 1985. In a preferred embodiment, the fluid passage 1980 is adapted to convey fluidic materials such as, for example, cement, drilling mud, epoxy, or lubricants at operating 30 pressures and flow rates ranging from about 0 to 9,000 psi and 0 to 3,000 gallons/minute.
o The sealing sleeve 1915 is coupled to the innerstring adapter 1910 and the inner sealing mandrel 1920. The sealing sleeve 1915 preferably comprises a substantially hollow tubular member or members. The sealing sleeve 1915 may be fabricated from any number of conventional commercially available materials such as, for example, 5 oilfield country tubular goods, carbon steel, low alloy steel, stainless steel or other high
strength materials. In a preferred embodiment, the sealing sleeve 1915 is fabricated from oilfield country tubular goods in order to optimally provide mechanical properties
that substantially match the remaining components of the apparatus 1900.
The sealing sleeve 1915 may be coupled to the innerstring adapter 1910 using 10 any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfield country tubular goods specialty type threaded
connection, ratchet-latch type stab in connection, or a standard threaded connection. In a preferred embodiment, the sealing sleeve 1915 is removably coupled to the innerstring adapter 1910 by a standard threaded connection. The sealing sleeve 1915 15 may be coupled to the inner sealing mandrel 1920 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfield country tubular goods specialty type threaded connection, or a
standard threaded connection. In a preferred embodiment, the sealing sleeve 1915 is removably coupled to the inner sealing mandrel 1920 by a standard threaded 20 connection. The sealing sleeve 1915 preferably includes a fluid passage 1985 that is adapted to convey fluidic materials from the fluid passage 1980 into the fluid passage 1990. In a preferred embodiment, the fluid passage 1985 is adapted to convey fluidic materials such as, for example, cement, drilling mud, epoxy or lubricants at operating pressures 2 5 and flow rates ranging from about 0 to 9,000 psi and 0 to 3,000 gallons/minute.
The inner sealing mandrel 1920 is coupled to the sealing sleeve 1915 and the lower sealing head 1930. The inner sealing mandrel 1920 preferably comprises a substantially hollow tubular member or members. The inner sealing mandrel 1920 may be fabricated from any number of conventional commercially available materials 30 such as, for example, oilfield country tubular goods, stainless steel, low alloy steel,
carbon steel or other similar high strength materials. In a preferred embodiment, the
o inner sealing mandrel 1920 is fabricated from stainless steel in order to optimally provide mechanical properties similar to the other components of the apparatus 1900 while also providing a smooth outer surface to support seals and other moving parts that can operate with minimal wear, corrosion and pitting.
5 The inner sealing mandrel 1920 may be coupled to the sealing sleeve 1915 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfield country tubular goods specialty type
threaded connection, or a standard threaded connection. In a preferred embodiment, the inner sealing mandrel 1920 is removably coupled to the sealing sleeve l 915 by a 1 0 standard threaded connections. The inner sealing mandrel 1920 may be coupled to the lower sealing head 1930 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfield country
tubular goods specialty type threaded connection, ratchet-latch type stab in connectors or standard threaded connections. In a preferred embodiment, the inner sealing 15 mandrel 1920 is removably coupled to the lower sealing head 1930 by a standard threaded connections connection.
The inner sealing mandrel 1920 preferably includes a fluid passage 1990 that is adapted to convey fluidic materials from the fluid passage 1985 into the fluid passage 1995. In a preferred embodiment, the fluid passage 1990 is adapted to convey fluidic 20 materials such as, for example, cement, drilling mud, epoxy or lubricants at operating pressures and flow rates ranging from about O to 9,000 psi and 0 to 3,000 gal lons/minute.
The upper sealing head 1925 is coupled to the outer sealing mandrel 1935 and the expansion cone 1945. The upper sealing head 1925 is also movably coupled to the 2 5 outer surface of the inner sealing mandrel 1920 and the inner surface of the casing 1970. In this manner, the upper sealing head 1925, outer sealing mandrel 1935, and the expansion cone 1945 reciprocate in the axial direction. The radial clearance between the inner cylindrical surface of the upper sealing head 1925 and the outer surface of the inner sealing mandrel 1920 may range, for example, from about 0.025 to 30 0.05 inches. In a preferred embodiment, the radial clearance between the inner cylindrical surface of the upper sealing head 1925 and the outer surface of the inner
o (- sealing mandrel 1920 ranges from about 0.005 to 0.01 inches in order to optimally provide clearance for pressure seal placement. The radial clearance between the outer cylindrical surface of the upper sealing head 1925 and the inner surface of the casing 1970 may range, for example, Tom about 0.025 to 0.375 inches. In a preferred 5 embodiment, the radial clearance between the outer cylindrical surface of the upper sealing head 1925 and the inner surface of the casing 1970 ranges from about 0.025 to 0.125 inches in order to optimally provide stabilization for the expansion cone 1945 as the expansion cone 1945 is upwardly moved inside the casing 1970.
The upper sealing head 1925 preferably comprises an annular member having 10 substantially cylindrical inner and outer surfaces. The upper sealing head 1925 may be fabricated from any number of conventional commercially available materials such as, for example, oilfield country tubular goods, stainless steel, machine tool steel, or
similar high strength materials. In a preferred embodiment, the upper sealing head 1925 is fabricated from stainless steel in order to optimally provide high strength and 15 smooth outer surfaces that are resistant to wear, galling, corrosion and pitting.
The inner surface of the upper sealing head 1925 preferably includes one or more annular sealing members 2000 for sealing the interface between the upper sealing head 1925 and the inner sealing mandrel 1920. The sealing Novembers 2000 may comprise any number of conventional commercially available annular sealing 20 members such as, for example, o- rings, polypak seals or metal spring energized seals.
In a preferred embodiment, the sealing members 2000 comprise polypak seals available from Parker Seals in order to optimally provide sealing for a long axial motion. In a preferred embodiment, the upper sealing head 1925 includes a shoulder 25 2005 for supporting the upper sealing head 1925 on the lower sealing head 1930.
The upper sealing head 1925 may be coupled to the outer sealing mandrel 1935 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfield country tubular goods specialty type
threaded connection, or a standard threaded connections. In a preferred embodiment, 30 the upper sealing head 1925 is removably coupled to the outer sealing mandrel 1935 by a standard threaded connections. In a preferred embodiment, the mechanical
o coupling between the upper sealing head 1925 and the outer sealing mandrel 1935 includes one or more sealing members 2010 for fluidicly sealing the interface between the upper sealing head 1925 and the outer sealing mandrel 1935. The sealing members 2010 may comprise any number of conventional commercially available sealing 5 members such as, for example, o-rings, polypak seals or metal spring energized seals.
In a preferred embodiment, the sealing members 2010 comprise polypak seals available from Parker Seals in order to optimally provide sealing for a long axial stroking motion.
The lower sealing head 1930 is coupled to the inner sealing mandrel 1920 and 10 the load mandrel 1940. The lower sealing head 1930 is also movably coupled to the inner surface ofthe outer sealing mandrel 1935. In this manner, the upper sealing head 1925 and outer sealing mandrel 1935 reciprocate in the axial direction. The radial clearance between the outer surface of the lower sealing head 1930 and the inner surface ofthe outer sealing mandrel 1935 may range, for example, from about 0.025 to 15 0.05 inches. In a preferred embodiment, the radial clearance between the outer surface ofthe lower sealing head 1930 and the inner surface of the outer sealing mandrel 1935 ranges from about 0.005 to 0.01O inches in order to optimally provide a close tolerance having room for the installation of pressure seal rings.
The lower sealing head 1930 preferably comprises an annular member having 2 0 substantially cylindrical inner and outer surfaces. The lower sealing head 1930 may be fabricated from any number of conventional commercially available materials such as, for example, oilfield country tubular goods, stainless steel, machine tool steel or other
similar high strength materials. In a preferred embodiment, the lower sealing head 1930 is fabricated from stainless steel in order to optimally provide high strength and 2 5 resistance to wear, galling, corrosion, and pitting.
The outer surface of the lower sealing head 1930 preferably includes one or more annular sealing members 2015 for sealing the interface between the lower sealing head 1930 and the outer sealing mandrel 1935. The sealing members 2015 may comprise any number of conventional commercially available annular sealing 30 members such as, for example, o-rings, polypak seals, or metal spring energized seals.
In a preferred embodiment, the sealing members 20 I 5 comprise polypak seals
o available from Parker Seals in order to optimally provide sealing for a long axial stroke. The lower sealing head 1930 may be coupled to the inner sealing mandrel 1920 using any number of conventional commercially available mechanical couplings such 5 as, for example, drillpipe connection, oilfield country tubular goods specialty type threaded connection, welding, amorphous bonding or a standard threaded
connection.
In a preferred embodiment, the lower sealing head 1930 is removably coupled to the inner sealing mandrel 1920 by a standard threaded connection.
In a preferred embodiment, the mechanical coupling between the lower sealing 10 head 1930 and the inner sealing mandrel 1920 includes one or more sealing members 2020 for fluidicly sealing the interface between the lower sealing head 1930 and the inner sealing mandrel 1920. The sealing members 2020 may comprise any number of conventional commercially available sealing members such as, for example, o-rings, polypak seals, or metal spring energized seals. In a preferred embodiment, the sealing 15 members 2020 comprise polypak seals available from Parker Seals in order to optimally provide sealing for a long axial motion.
The lower sealing head 1930 may be coupled to the load mandrel 1940 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfeld country tubular goods specialty type threaded 2 0 connections, welding, amorphous bonding or a standard threaded connection. In a preferred embodiment, the lower sealing head 1930 is removably coupled to the load mandrel 1940 by a standard threaded connection. In a preferred embodiment, the mechanical coupling between the lower sealing head 1930 and the load mandrel 1940 includes one or more sealing members 2025 for fluidicly sealing the interface between 2 5 the lower sealing head 1930 and the load mandrel 1940. The sealing members 2025 may comprise any number of conventional commercially available sealing members such as, for example, o-rings, polypak seals, or metal spring energized seals. In a preferred embodiment, the sealing members 2025 comprise polypak seals available from Parker Seals in order to optimally provide sealing for a long axial stroke.
3 0 In a preferred embodiment, the lower sealing head 1930 includes a throat passage 2040 iluidicly coupled between the fluid passages 1990 and 1995. The throat
o A passage 2040 is preferably of reduced size and is adapted to receive and engage with a plug 2045, or other similar device. In this manner, the fluid passage 1990 is fluidicly isolated from the fluid passage 1995. In this manner, the pressure chamber 2030 is pressurized. 5 The outer sealing mandrel 1935 is coupled to the upper sealing head 1925 and the expansion cone 1945. The outer sealing mandrel 1935 is also movably coupled to the inner surface of the casing 1970 and the outer surface of the lower sealing head 1930. In this manner, the upper sealing head 1925, outer sealing mandrel 1935, and the expansion cone 1945 reciprocate in the axial direction. The radial clearance 10 between the outer surface of the outer sealing mandrel 1935 and the inner surface of the casing 1970 may range, for example, from about 0.025 to 0.375 inches. In a preferred embodiment, the radial clearance between the outer surface of the outer sealing mandrel 1935 and the inner surface ofthe casing 1970 ranges from about 0.025 to 0.125 inches in order to optimally provide maximum piston surface area to 15 maximize the radial expansion force. The radial clearance between the inner surface ofthe outer sealing mandrel 1935 and the outer surface ofthe lower sealing head 1930 may range, for example, from about 0.025 to 0.05 inches. In a preferred embodiment, the radial clearance between the inner surface of the outer sealing mandrel 1935 and the outer surface of the lower sealing head 1930 ranges from about 0.005 to 0.010 20 inches in order to optimally provide a minimum gap for the sealing elements to bridge and seal.
The outer sealing mandrel 1935 preferably comprises an annular member having substantially cylindrical inner and outer surfaces. The outer sealing mandrel 1935 may be fabricated from any number of conventional commercially available 25 materials such as, for example, low alloy steel, carbon steel, 13 chromium steel or stainless steel. In a preferred embodiment, the outer sealing mandrel 1935 is fabricated from stainless steel in order to optimally provide maximum strength and minimum wall thickness while also providing resistance to corrosion, galling and pitting.
The outer sealing mandrel 1935 may be coupled to the upper sealing head 1925 30 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfield country tubular goods specialty type
o threaded connection, standard threaded connections, or welding. In a preferred embodiment, the outer sealing mandrel 1935 is removably coupled to the upper sealing head 1925 by a standard threaded connections connection. The outer sealing mandrel 1935 may be coupled to the expansion cone 1945 using any number of conventional 5 commercially available mechanical couplings such as, for example, drillpipe connection, oilfield country tubular goods specialty type threaded connection, or a
standard threaded connections connection, or welding. In a preferred embodiment, the outer sealing mandrel 1935 is removably coupled to the expansion cone 1945 by a standard threaded connections connection.
10 The upper sealing head 1925, the lovver sealing head 1930, the inner sealing mandrel 1920, and the outer sealing mandrel 1935 together define a pressure chamber 2030. The pressure chamber 2030 is fluidicly coupled to the passage 1990 via one or more passages 2035. During operation of the apparatus l 900, the plug 2045 engages with the throat passage 2040 to fluidicly isolate the fluid passage 1990 from the fluid 15 passage 1995. The pressure chamber 2030 is then pressurized which in turn causes the upper sealing head 1925, outer sealing mandrel 1935, and expansion cone 1945 to reciprocate in the axial direction. The axial motion of the expansion cone 1945 in turn expands the casing 1970 in the radial direction.
The load mandrel 1940 is coupled to the lower sealing head 1930 and the 20 mechanical slip body 1955. The load mandrel 1940 preferably comprises an annular member having substantially cylindrical inner and outer surfaces. The load mandrel 1940 may be fabricated from any number of conventional commercially available materials such as, for example, oilfeld country tubular goods, low alloy steel, carbon steel, stainless steel or other similar high strength materials. In a preferred 2 5 embodiment, the load mandrel 1940 is fabricated from oilfield country tubular goods
in order to optimally provide high strength.
The load mandrel 1940 may be coupled to the lower sealing head 1930 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfield country tubular goods specialty type threaded
3 () connection, welding, amorphous bonding or a standard threaded connection. In a preferred embodiment, the load mandrel 1940 is removably coupled to the lower
o C- r sealing head 1930 by a standard threaded connection. The load mandrel 1940 may be coupled to the mechanical slip body 1955 using any number of conventional commercially available mechanical couplings such as, for example, a drillpipe connection, oilfield country tubular goods specialty type threaded connections,
5 welding, amorphous bonding, or a standard threaded connections connection. In a preferred embodiment, the load mandrel 1940 is removably coupled to the mechanical slip body 1955 by a standard threaded connections connection.
The load mandrel 1940 preferably includes a fluid passage 1995 that is adapted to convey fluidic materials from the fluid passage 1990 to the region outside of the 10 apparatus 1900. In a preferred embodiment, the fluid passage 1995 is adapted to convey fluidic materials such as? for example, cement, epoxy, water, drilling mud, or lubricants at operating pressures and flow rates ranging from about O to 9,000 psi and O to 3,000 gallons/minute.
The expansion cone 1945 is coupled to the outer sealing mandrel 1935. The 15 expansion cone 1945 is also movably coupled to the inner surface of the casing 1970.
In this manner, the upper sealing head 1925, outer sealing mandrel 1935, and the expansion cone 1945 reciprocate in the axial direction. The reciprocation of the expansion cone 1945 causes the casing 1970 to expand in the radial direction.
The expansion cone 1945 preferably comprises an annular member having o substantially cylindrical inner and conical outer surfaces. The outside radius of the outside conical surface may range, for example, from about 2 to 34 inches. In a preferred embodiment, the outside radius of the outside conical surface ranges from about 3 to 28 inches in order to optimally provide cone dimensions for the typical range of tubular members.
25 The axial length of the expansion cone 1945 may range, for example, from about 2 to 8 times the largest outer diameter of the expansion cone 1945. In a preferred embodiment, the axial length of the expansion cone 1945 ranges from about 3 to 5 times the largest outer diameter ofthe expansion cone 1945 in order to optimally provide stability and centralization of the expansion cone 1945 during the expansion 30 process. In a preferred embodiment, the angle of attack of the expansion cone 1945 ranges from about 5 to 30 degrees in order to optimally balance friction forces with the 9Y
O: desired amount of radial expansion. The expansion cone 1945 angle of attack will vary as a function of the operating parameters of the particular expansion operation.
The expansion cone] 945 may be fabricated from any number of conventional commercially available materials such as, for example, machine tool steel, ceramics, 5 tungsten carbide, nitride steel, or other similar high strength materials. In a preferred embodiment, the expansion cone 1945 is fabricated from D2 machine tool steel in order to optimally provide high strength and resistance to corrosion, wear, galling, and pitting. In a particularly preferred embodiment, the outside surface of the expansion cone 1945 has a surface hardness ranging from about 58 to 62 Rockwell C in order t 1 0 optimally provide high strength and resist wear and galling.
I he expansion cone 1945 may be coupled to the outside sealing mandrel 1935 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection oilfeld tubular country goods specialty type threaded connection, welding, amorphous bonding, or a standard threaded connections 1 5 connection. In a preferred embodiment, the expansion cone 1945 is coupled to the outside sealing mandrel 1935 using a standard threaded connections connection in order to optimally provide connector strength for the typical operating loading conditions while also permitting easy replacement of the expansion cone 1945.
The mandrel launcher 1950 is coupled to the casing 1970. The mandrel 2 0 launcher 1950 comprises a tubular section of casing having a reduced wall thickness compared to the casing 1970. In a preferred embodiment, the wall thickness of the mandrel launcher is about SO to 100 % of the wall thickness ofthe casing 1970. In this manner, the initiation of the radial expansion of the casing 1970 is facilitated, and the insertion of the larger outside diameter mandrel launcher 1950 into the we!!bore for 25 casing is facilitated.
The mandrel launcher 1950 may be coupled to the casing 1970 using any number of conventional mechanical couplings. The mandrel launcher 1950 may have a wall thickness ranging' for example, from about 0.15 to 1.5 inches. In a preferred embodiment, the wall thickness of the mandrel launcher 1950 ranges from about 0.25 3 0 to 0.75 inches in order to optimally provide high strength with a small overall profile.
The mandrel launcher i 950 may be fabricated from any number of conventional
to rig 2-./' nL.
commercially available materials such as, for example, oil field tubular goods, low
alloy steel, carbon steel, stainless steel or other similar high strength materials. In a preferred embodiment, the mandrel launcher 1950 is fabricated from oil field tubular
goods of higher strength but lower wall thickness than the casing 1970 in order to 5 optimally provide a thin walled container with approximately the same burst strength as the casing 1970.
The mechanical slip body 1955 is coupled to the load mandrel 1970, the mechanical slips 1960, and the drag blocks 1965. The mechanical slip body 1955 preferably comprises a tubular member having an inner passage 2050 fluidicly coupled 10 to the passage l 99S. In this manner, fluidic materials may be conveyed from the passage 2050 to a region outside of the apparatus 1900.
The mechanical slip body 1955 may be coupled to the load mandrel 1940 using any number of conventional mechanical couplings. In a preferred embodiment, the mechanical slip body 1955 is removably coupled to the load mandrel 1940 using a 15 standard threaded connection in order to optimally provide high strength and permit the mechanical slip body 1955 to be easily replaced. The mechanical slip body 1955 may be coupled to the mechanical slips 1955 using any number of conventional mechanical couplings. In a preferred embodiment, the mechanical slip body 1955 is removably coupled to the mechanical slips 1955 using threads and sliding steel retainer 20 rings in order to optimally provide high strength coupling and also permit easy replacement of the mechanical slips 1955. The mechanical slip body 1955 may be coupled to the drag blocks 1965 using any number of conventional mechanical couplings. In a preferred embodiment, the mechanical slip body 1955 is removably coupled to the drag blocks 1965 using threaded connections and sliding steel retainer 25 rings in order to optimally provide high strength and also permit easy replacement of the drag blocks 1965.
The mechanical slips 1960 are coupled to the outside surface of the mechanical slip body 1955. During operation of the apparatus 1900, the mechanical slips 1960 prevent upward movement of the casing 1970 and mandrel launcher 1950. In this 30 manner, during the axial reciprocation of the expansion cone 1945, the casing 1970 and mandrel launcher 1950 are maintained in a substantially stationary position. In 1 U 1
O2 5 1 1. 2 3. 1 MT ''
' this manner, the mandrel launcher 1950 and casing 1970 are expanded in the radial D direction by the axial movement of the expansion cone 1945.
The mechanical slips 1960 may comprise any number of conventional commercially available mechanical slips such as, for example, RTTS packer tungsten 5 carbide mechanical slips, RTTS packer wicker type mechanical slips or Model 3L retrievable bridge plug tungsten carbide upper mechanical slips. In a preferred embodiment, the mechanical slips 1960 comprise RTTS packer tungsten carbide mechanical slips available from Halliburton Energy Services in order to optimally provide resistance to axial movement of the casing 1970 during the expansion process.
10 The drag blocks 1965 are coupled to the outside surface of the mechanical slip body 1955. During operation of the apparatus 1900, the drag blocks 1965 prevent upward movement of the casing 1970 and mandrel launcher 1950. In this manner, during the axial reciprocation of the expansion cone 1945, the casing 1970 and mandrel launcher 1950 are maintained in a substantially stationary position. In this 15 manner, the mandrel launcher 1950 and casing 1970 are expanded in the radial direction by the axial movement of the expansion cone 1945.
The drag blocks 1965 may comprise any number of conventional commercially available mechanical slips such as, for example, RT1 S packer tungsten carbide mechanical slips, RTTS packer wicker type mechanical slips or Model 3L retrievable 2 0 bridge plug tungsten carbide upper mechanical slips. In a preferred embodiment, the drag blocks 1965 comprise RTTS packer tungsten carbide mechanical slips available from Halliburton Energy Services in order to optimally provide resistance to axial movement of the casing I 970 during the expansion process.
The casing 1970 is coupled to the mandrel launcher 1950. The casing 1970 is 2 5 further removably coupled to the mechanical slips 1960 and drag blocks 1965. The casing 1970 preferably comprises a tubular member. The casing 1970 may be fabricated from any number of conventional commercially available materials such as, for example, slotted tubulars, oil field country tubular goods, low alloy steel, carbon
steel, stainless steel or other similar high strength materials. In a preferred 3 0 embodiment, the casing 1970 is fabricated from oilfield country tubular goods
available from various foreign and domestic steel mills in order to optimally provide 1:,2
o c- z-791.'1 high strength. In a preferred embodiment, the upper end of the casing 1970 includes one or more sealing members positioned about the exterior of the casing 1970.
During operation, the apparatus 1900 is positioned in a wellbore with the upper end of the casing 1970 positioned in an overlapping relationship within an existing 5 wellbore casing. In order minimize surge pressures within the borehole during placement of the apparatus 1900, the fluid passage 1975 is preferably provided with one or more pressure relief passages. During the placement of the apparatus 1900 in the wellbore, the casing 1970 is supported by the expansion cone 1945.
After positioning of the apparatus 1900 within the bore hole in an overlapping 10 relationship with an existing section of wellbore casing, a first fluidic material is pumped into the fluid passage 1975 from a surface location. The first fluidic material is conveyed from the fluid passage 1975 to the fluid passages 1980, 1985, 1990, 1995, and 2050. The first fluidic material will then exit the apparatus and fill the annular region between the outside of the apparatus 1900 and the interior walls of the bore 15 hole. The first fluidic material may comprise any number of conventional commercially available materials such as, for example, drilling mud, water, epoxy or cement. In a preferred embodiment, the first fluidic material comprises a hardenable fluidic sealing material such as, for example, cement or epoxy. In this manner, a 20 wellbore casing having art outer annular layer of a hardenable material may be formed.
The first fluidic material may be pumped into the apparatus 1900 at operating pressures and flow rates ranging, for example, from about O to 4,500 psi, and 0 to 3,000 gallons/minute. In a preferred embodiment, the first fluidic material is pumped into the apparatus 1900 at operating pressures and now rates ranging from about O to 25 4,500 psi and 0 to 3, 000 gallons/minute in order to optimally provide operating pressures and flow rates for typical operating conditions.
At a predetermined point in the injection of the first fluidic material such as, for example, after the annular region outside of the apparatus 1900 has been filled to a predetermined level, a plug 2045, dart, or other similar device is introduced into the 30 first fluidic material. The plug 2045 lodges in the throat passage 2040 thereby fluidicly isolating the fluid passage 1990 from the fluid passage l 99S.
io3
o 25, al ARer placement of the plug 2045 in the throat passage 2040, a second fluidic material is pumped into the fluid passage 1975 in order to pressurize the pressure chamber 2030. The second fluidic material may comprise any number of conventional commercially available materials such as, for example, water, drilling gases, drilling 5 mud or lubricant. In a preferred embodiment, the second fluidic material comprises a nonhardenable fluidic material such as, for example, water, drilling mud or lubricant in order minimize frictional forces.
The second fluidic material may be pumped into the apparatus 1900 at operating pressures and flow rates ranging, for example, from about 0 to 4,500 psi and 1 0 0 to 4,500 gallons/minute. In a preferred embodiment, the second fluidic material is pumped into the apparatus l 900 at operating pressures and flow rates ranging from about 0 to 3,500 psi, and 0 to 1,200 gallons/minute in order to optimally provide expansion of the casing 1970.
The pressurization of the pressure chamber 2030 causes the upper sealing head 15 1925, outer sealing mandrel 1935, and expansion cone 1945 to move in an axial direction. As the expansion cone 1945 moves in the axial direction, the expansion cone 1945 pulls the mandrel launcher]950 and drag blocks 1965 along, which sets the mechanical slips 1960 and stops further axial movement of the mandrel launcher 1950 and casing 1970. In this manner, the axial movement ofthe expansion cone 1945 2 0 radially expands the mandrel launcher 1950 and casing 1970.
Once the upper sealing head 1925, outer sealing mandrel 1935, and expansion cone 1945 complete an axial stroke, the operating pressure of the second fluidic material is reduced and the drill string 1905 is raised. This causes the iMer sealing mandrel 1920, lower sealing head 1930, load mandrel 194O, And mechanical slip body 2 5 1955 to move upward. This upsets the mechanical slips 1960 and permits the mechanical slips 1960 and drag blocks 1965 to be moved upward within the mandrel launcher and casing 1970. When the lovver sealing head 1930 contacts the upper sealing head 1925, the second fluidic material is again pressurized and the radial expansion process continues. In this manner, the mandrel launcher 1950 and casing 3 0 1970 are radial expanded through repeated axial strokes of the upper sealing head 1925, outer sealing mandrel l 935 and expansion cone 1945. Throughput the radial
O f I To ( expansion process, the upper end of the casing 1970 is preferably maintained in an overlapping relation with an existing section of wellbore casing.
At the end of the radial expansion process, the upper end of the casing 1970 is expanded into intimate contact with the inside surface of the lower end of the existing 5 wellbore casing. In a preferred embodiment, the sealing members provided at the upper end of the casing 1970 provide a fluidic seal between the outside surface of the upper end of the casing 1970 and the inside surface of the lower end of the existing wellbore casing. In a preferred embodiment, the contact pressure between the casing 1970 and the existing section of wellbore casing ranges from about 400 to 10,000 psi 10 in order to optimally provide contact pressure for activating sealing members, provide optimal resistance to axial movement of the expanded casing 1970, and optimally support typical tensile and compressive loads.
In a preferred embodiment, as the expansion cone 1945 nears the end of the casing 1970, the operating flow rate of the second fluidic material is reduced in order 15 to minimize shock to the apparatus 1900. In an alternative embodiment, the apparatus 1900 includes a shock absorber for absorbing the shock created by the completion of the radial expansion of the casing 1970.
In a preferred embodiment, the reduced operating pressure of the second fluidic material ranges from about 100 to l,OOO psi as the expansion cone 1945 nears the end 2 0 of the casing 1970 in order to optimally provide reduced axial movement and velocity of the expansion cone 1945. In a preferred embodiment, the operating pressure of the second fluidic material is reduced during the return stroke of the apparatus 1900 to the range of about O to 500 psi in order minimize the resistance to the movement of the expansion cone 1945. In a preferred embodiment, the stroke length of the apparatus 2 5 l 900 ranges from about l O to 45 feet in order to optimally provide equipment lengths that can be handled by typical oil well rigging equipment while also minimizing the frequency at which the expansion cone 1945 must be stopped so the apparatus 1900 can be re-stroked for further expansion operations.
In an alternative embodiment, at least a portion of the upper sealing head 1925 3 0 includes an expansion cone for radially expanding the mandrel launcher 1950 and casing 1970 during operation of the apparatus 1900 in order to increase the surface US
c C area of the casing 1970 acted upon during the radial expansion process. In this manner, the operating pressures can be reduced.
In an alternative embodiment, mechanical slips are positioned in an axial location between the sealing sleeve l91S and the inner sealing mandrel 1920 in order 5 to simplify the operation and assembly of the apparatus 1900.
Upon the complete radial expansion of the casing 1970, if applicable, the first fluidic material is permitted to cure within the annular region between the outside of the expanded casing 1970 and the interior walls ofthe wellbore. In the case where the expanded casing 1970 is slotted, the cured fluidic material will preferably permeate 10 and envelop the expanded casing. In this manner, a new section of wellbore casing is formed within a wellbore. Alternatively, the apparatus 1900 may be used to join a first section of pipeline to an existing section of pipeline. Alternatively, the apparatus 1900 may be used to directly line the interior of a wellbore with a casing, without the use of an outer annular layer of a hardenable material. Alternatively, the apparatus 1900 may 15 be used to expand a tubular support member in a hole.
During the radial expansion process, the pressurized areas of the apparatus 1900 are limited to the fluid passages 1975, 1980, 1985, and 1990, and the pressure chamber 2030. No fluid pressure acts directly on the mandrel launcher 1950 and casing 1970. This permits the use of operating pressures higher than the mandrel 2 0 launcher 1950 and casing 1970 could normally withstand.
Referring now to Figure 16, a preferred embodiment of an apparatus 2100 for forming a mono-diameter wellbore casing will be described. The apparatus 2100 preferably includes a drillpipe 2105, an innerstring adapter 2110, a sealing sleeve 2115, an inner sealing mandrel 2120, slips 2125, upper sealing head 2130, lower 25 sealing head 2135, outer sealing mandrel 2140, load mandrel 2145, expansion cone 2150, and casing 2155.
The drillpipe 2105 is coupled to the innerstring adapter 2110. During operation of the apparatus 2100, the drillpipe 2105 supports the apparatus 2100. The drillpipe 2105 preferably comprises a substantially hollow tubular member or members. The 3 0 drillpipe 2105 may be fabricated from any number of conventional commercially available materials such as, for example, oilfield country tubular goods, low alloy
o f steel, carbon steel, stainless steel or other similar high strength material. In a preferred embodiment, the drillpipe 2105 is fabricated from coiled tubing in order to facilitate the placement of the apparatus 1900 in non-vertical wellbores. The drillpipe 2105 may be coupled to the innerstring adapter 2110 using any number of conventional 5 commercially available mechanical couplings such as, for example, drillpipe connection, oilfield country tubular goods specialty type threaded connection, ratchet-
latch type connection, or a standard threaded connection. In a preferred embodiment, the drillpipe 2105 is removably coupled to the innerstring adapter 2110 by a drill pipe connection. 10 The drillpipe 2105 preferably includes a fluid passage 2160 that is adapted to convey fluidic materials from a surface location into the fluid passage 2165. In a preferred embodiment, the fluid passage 2160 is adapted to convey fluidic materials such as, for example, cement, epoxy, water, drilling mud or lubricants at operating pressures and flow rates ranging from about O to 9,000 psi and 0 to 3,000 1 s gallons/minute.
The innerstring adapter 2110 is coupled to the drill string 2105 and the sealing sleeve 2115. The innerstring adapter 2110 preferably comprises a substantially hollow tubular member or members. The innerstring adapter 2110 may be fabricated from any number of conventional commercially available materials such as, for example, O oilfield country tubular goods, low alloy steel, carbon steel, stainless steel or other
similar high strength materials. In a preferred embodiment, theinnerstring adapter 2110 is fabricated from stainless steel in order to optimally provide high strength, low friction, and resistance to corrosion and wear.
The innerstring adapter 2110 may be coupled to the drill string 2105 using any 2 5 number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfield country tubular goods specialty type threaded
connection, ratchet-latch type connection or a standard threaded connection. In a preferred embodiment, the innerstring adapter 2110 is removably coupled to the drill pipe 2105 by a drillpipe connection. The innerstring adapter 21 10 may be coupled to 3 0 the sealing sleeve 21 15 using any number of conventional commercially available mechanical couplings such as, for example. drillpipe connection, oilfield country
1:: 7
tubular goods specialty type threaded connection, ratchet-latch type threaded connection, or a standard threaded connection. In a preferred embodiment, the innerstring adapter 21 l O is removably coupled to the sealing sleeve 21 15 by a standard threaded connection.
5 The innerstring adapter 2110 preferably includes a fluid passage 2165 that is adapted to convey fluidic materials from the fluid passage 2160 into the fluid passage 2170. In a preferred embodiment, the fluid passage 2165 is adapted to convey fluidic materials such as, for example, cement, epoxy, water drilling muds, or lubricants at operating pressures and flow rates ranging from about O to 9,000 psi and 0 to 3,000 1 0 gallons/minute.
The sealing sleeve 2115 is coupled to the innerstring adapter 2110 and the inner sealing mandrel 2120. The sealing sleeve 2115 preferably comprises a substantially hollow tubular member or members. The sealing sleeve 2115 may be fabricated from any number of conventional commercially available materials such as, for example, oil 5 field tubular goods, low alloy steel, carbon steel, stainless steel or other similar high
strength materials. In a preferred embodiment, the sealing sleeve 21 l S is fabricated from stainless steel in order to optimally provide high strength' low friction surfaces, and resistance to corrosion, wear, galling, and pitting.
The sealing sleeve 21 15 may be coupled to the innerstring adapter 21 l O using 2 0 any number of conventional commercially available mechanical couplings such as, for example, a standard threaded connection, oilfeld country tubular goods specialty type threaded connections, welding, amorphous bonding, or a standard threaded connection.
In a preferred embodiment, the sealing sleeve 21 I S is removably coupled to the innerstring adapter 21 l O by a standard threaded connection. The sealing sleeve 21 l S 2 5 may be coupled to the inner sealing mandrel 2120 using any number of conventional commercially available mechanical couplings such as, for example, a standard threaded connection, oilfield country tubular goods specialty type threaded
connections, welding, amorphous bonding, or a standard threaded connection. In a preferred embodiment, the sealing sleeve 2115 is removably coupled to the inner 3 0 sealing mandrel 2120 by a standard threaded connection.
C 8
* o c- The sealing sleeve 2115 preferably includes a fluid passage 2170 that is adapted to convey fluidic materials from the fluid passage 2165 into the fluid passage 2175. In a preferred embodiment, the fluid passage 2170 is adapted to convey fluidic materials such as, for example, cement, epoxy, water, drilling mud, or lubricants at operating 5 pressures and flow rates ranging from about 0 to 9,000 psi and 0 to 3,000 gallons/minute. The inner sealing mandrel 2120 is coupled to the sealing sleeve 2115, slips 2125, and the lower sealing head 2135. The inner sealing mandrel 2120 preferably comprises a substantially hollow tubular member or members. The inner sealing 10 mandrel 2120 may be fabricated from any number of conventional commercially available materials such as, for example, oilfield country tubular goods, low alloy
steel, carbon steel, stainless steel or other similar high strength materials. In a preferred embodiment, the inner sealing mandrel 2120 is fabricated from stainless steel in order to optimally provide high strength, low friction surfaces, and corrosion and 15 wear resistance.
The inner sealing mandrel 2120 may be coupled to the sealing sleeve 2115 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfield country tubular goods specialty type
threaded connection, or a standard threaded connection. In a preferred embodiment, 20 the inner sealing mandrel 2120 is removably coupled to the sealing sleeve 2115 by a standard threaded connection. The standard threaded connection provides high strength and permits easy replacement of components. The inner sealing mandrel 2120 may be coupled to the slips 2125 using any number of conventional commercially available mechanical couplings such as, for example, welding, amorphous bonding, or 2 5 a standard threaded connection. In a preferred embodiment, the inner sealing mandrel 2120 is removably coupled to the slips 2125 by a standard threaded connection. The inner sealing mandrel 2120 may be coupled to the lower sealing head 2135 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfield country tubular goods specialty type threaded
30 connection, welding, amorphous bonding or a standard threaded connection. In a
o c preferred embodiment, the inner sealing mandrel 2120 is removably coupled to the lower sealing head 2135 by a standard threaded connection.
The inner sealing mandrel 2120 preferably includes a fluid passage 2175 that is adapted to convey fluidic materials from the fluid passage 2170 into the fluid passage 5 2180. In a preferred embodiment, the fluid passage 2175 is adapted to convey fluidic materials such as, for example, cement, epoxy, water, drilling mud or lubricants at operating pressures and flow rates ranging from about O to 9,000 psi and 0 to 3,000 gal lons/minute.
The slips 2125 are coupled to the outer surface of the inner sealing mandrel 10 2120. During operation of the apparatus 2100, the slips 2125 preferably maintain the casing 2155 in a substantially stationary position during the radial expansion of the casing 2155. In a preferred embodiment, the slips 2125 are activated using the fluid passages 2185 to convey pressurized fluid material into the slips 2125 The slips 2125 may comprise any number of commercially available hydraulic 15 slips such as, for example, RTTS packer tungsten carbide hydraulic slips or Model 3I retrievable bridge plug hydraulic slips. In a preferred embodiment, the slips 2125 comprise RTTS packer tungsten carbide hydraulic slips available from Flalliburton Energy Services in order to optimally provide resistance to axial movement of the casing 2155 during the expansion process. In a particularly preferred embodiment, the 20 slips include a fluid passage 2190, pressure chamber 2195, spring return 2200, and slip member 2205.
The slips 2125 may be coupled to the inner sealing mandrel 2120 using any number of conventional mechanical couplings. In a preferred embodiment, the slips 2125 are removably coupled to the outer surface ofthe inner sealing mandrel 2120 by 25 a thread connection in order to optimally provide interchangeability of parts.
The upper sealing head 2130 is coupled to the outer sealing mandrel 2140 and expansion cone 2150. The upper sealing head 2130 is also movably coupled to the outer surface of the inner sealing mandrel 2120 and the inner surface of the casing 2155. In this manner, the upper sealing head 2130 reciprocates in the axial direction.
30 The radial clearance between the inner cylindrical surface of the upper sealing head 2130 and the outer surface ofthe inner scaling mandrel 2120 may range, for example,
o it' from about 0.025 to 0.05 inches. In a preferred embodiment, the radial clearance between the inner cylindrical surface of the upper sealing head 2130 and the outer surface ofthe inner sealing mandrel 2120 ranges from about 0.005 to 0.010 inches in order to optimally provide a pressure seal. The radial clearance between the outer 5 cylindrical surface of the upper sealing head 2130 and the inner surface of the casing 2155 may range, for example, from about 0.025 to 0.375 inches. In a preferred embodiment, the radial clearance between the outer cylindrical surface of the upper sealing head 2130 and the inner surface of the casing 2155 ranges from about 0.025 to 0.125 inches in order to optimally provide stabilization for the expansion cone 2130 10 during axial movement of the expansion cone 2130.
The upper sealing head 2130 preferably comprises an annular member having substantially cylindrical inner and outer surfaces. The upper sealing head 2130 may be fabricated from any number of conventional commercially available materials such as, for example, low alloy steel, carbon steel, stainless steel or other similar high strength 15 materials. In a preferred embodiment, the upper sealing head 2130 is fabricated from stainless steel in order to optimally provide high strength, corrosion resistance, and low friction surfaces. The inner surface of the upper sealing head 2130 preferably includes one or more annular sealing members 2210 for sealing the interface between the upper sealing head 2130 and the inner sealing mandrel 2120. The sealing members 2210 2 0 may comprise any number of conventional commercially available annular sealing members such as, for example, o-rings, polypak seals, or metal spring energized seals.
In a preferred embodiment, the sealing members 2210 comprise polypak seals available from Parker Seals in order to optimally provide sealing for a long axial stroke. 2 s In a preferred embodiment, the upper sealing head 2130 includes a shoulder 2215 for supporting the upper sealing head 2130 on the lower sealing head 2135.
The upper sealing head 2130 may be coupled to the outer sealing mandrel 2140 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfeld country tubular goods specialty threaded 3 0 connection, welding, amorphous bonding or a standard threaded connection. In a preferred embodiment, the upper sealing head 2130 is removably coupled to the outer
o l Hr.7 A. sealing mandrel 2140 by a standard threaded connection. In a preferred embodiment, the mechanical coupling between the upper sealing head 2130 and the outer sealing mandrel 2140 includes one or more sealing members 2220 for fluidicly sealing the interface between the upper sealing head 2130 and the outer sealing mandrel 2140.
5 The sealing members 2220 may comprise any number of conventional commercially available sealing members such as, for example, o-rings, polypak seals' or metal spring energized seals. In a preferred embodiment, the sealing members 2220 comprise polypak seals available from Parker Seals in order to optimally provide sealing for a long axial stroke.
10 The lower sealing head 2135 is coupled to the inner sealing mandrel 2120 and the load mandrel 2145. The lower sealing head 2135 is also movably coupled to the inner surface of the outer sealing mandrel 2140. In this manner, the upper sealing head 2130, outer sealing mandrel 2140, and expansion cone 2150 reciprocate in the axial direction. The radial clearance between the outer surface of the lower sealing head 15 2135 and the inner surface of the outer sealing mandrel 2140 may range, for example, from about 0.0025 to 0.05 inches. In a preferred embodiment, the radial clearance between the outer surface of the lower sealing head 2135 and the inner surface of the outer sealing mandrel 2140 ranges from about 0.0025 to 0.05 inches in order to optimally provide minimal radial clearance.
20 The lower sealing head 2135 preferably comprises an annular member having substantially cylindrical inner and outer surfaces. The lower sealing head 2135 may be fabricated from any number of conventional commercially available materials such as, for example, oilfield country tubular goods, low alloy steel, carbon steel, stainless steel
or other similar high strength materials. In a preferred embodiment, the lower sealing 25 head 2135 is fabricated from stainless steel in order to optimally provide high strength, corrosion resistance, and low friction surfaces. The outer surface of the lower sealing head 2135 preferably includes one or more annular sealing members 2225 for sealing the interface between the lower sealing head 2135 and the outer sealing mandrel 2140.
The sealing members 2225 may comprise any number of conventional commercially 30 available annular sealing members such as, for example, orings, polypak seals or metal spring energized seals. In a preferred embodiment, the sealing members 2295
o C- comprise polypak seals available from Parker Seals in order to optimally provide sealing for a long axial stroke.
The lower sealing head 2135 may be coupled to the inner sealing mandrel 2120 using any number of conventional commercially available mechanical couplings such 5 as, for example, drillpipe connection, oilfield country tubular goods specialty type =
threaded connection, welding, amorphous bonding, or a standard threaded connection.
In a preferred embodiment, the lower sealing head 2135 is removably coupled to the inner sealing mandrel 2120 by a standard threaded connection. In a preferred embodiment, the mechanical coupling between the lower sealing head 2135 and the 10 inner sealing mandrel 2 l 20 includes one or more sealing members 2230 for fluidicly sealing the interface between the lower sealing head 2 l 35 and the inner sealing mandrel 2120. The sealing members 2230 may comprise any number of conventional commercially available sealing members such as, for example, o-rings, polypak seals, or metal spring energized seals. In a preferred embodiment, the sealing members 2230 15 comprise polypak seals available from Parker Seals in order to optimally provide sealing for a long axial stroke.
The lower sealing head 2135 may be coupled to the load mandrel 2145 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfield country tubular goods specialty threaded
2 0 connection, welding, amorphous bonding, or a standard threaded connection. In a preferred embodiment, the lower sealing head 2135 is removably coupled to the load mandrel 2145 by a standard threaded connection. In a preferred embodiment, the mechanical coupling between the lower sealing head 2135 and the load mandrel 2145 includes one or more sealing members 2235 for i:luidicly sealing the interface between 25 the lower sealing head 1930 and the load mandrel 2145. The sealing members 2235 may comprise any number of conventional commercially available sealing members such as, for example, o-rings, polypak seals, or metal spring energized seals. In a preferred embodiment, the sealing members 2235 comprise polypak seals available from Parker Seals in order to optimally provide sealing for a long axial stroke.
3 0 In a preferred embodiment, the lower sealing head 2135 includes a throat passage 2240 fluidicly coupled between the fluid passages 2175 and 2180. The throat
Opassage 2240 is preferably of reduced size and is adapted to receive and engage with a plug 2245, or other similar device. In this manner, the fluid passage 2175 is fluidicly isolated from the fluid passage 2180. In this manner, the pressure chamber 2250 is pressurized. 5 The outer sealing mandrel 2140 is coupled to the upper sealing head 2130 and -
the expansion cone 2150. The outer sealing mandrel 2140 is also movably coupled to the inner surface ofthe casing 2155 and the outer surface ofthe lower sealing head! 2135. In this manner, the upper sealing head 2130, outer sealing mandrel 2140, and the expansion cone 2 I SO reciprocate in the axial direction. 'he radial clearance 10 between the outer surface of the outer sealing mandrel 2140 and the inner surface of the casing 2155 may range, for example, from about 0.025 to 0.375 inches. In a preferred embodiment, the radial clearance between the outer surface of the outer sealing mandrel 2140 and the inner surface ofthe casing 2155 ranges from about 0.02> to 0.125 inches in order to optimally provide stabilization for the expansion cone 2130 15 during the expansion process. The radial clearance between the inner surface of the outer sealing mandrel 2140 and the outer surface of the lower sealing head 135 may range, for example, from about 0.005 to 0.125 inches. In a preferred embodiment, the radial clearance between the inner surface of the outer sealing mandrel 2140 and the outer surface of the lower sealing head 2135 ranges from about 0.005 to 0.010 inches 20 in order to optimally provide minimal radial clearance.
The outer sealing mandrel 2140 preferably comprises an annular member having substantially cylindrical inner and outer surfaces. 'I'he outer sealing mandrel 2140 may be fabricated from any number of conventional commercially available materials such as, for example, oilfeld country tubular goods,!o alloy steel, carbon 25 steel, stainless steel, or other similar high strength materials. In a preferred embodiment, the outer sealing mandrel 2140 is fabricated from stainless steel in order a to optimally provide high strength, corrosion resistance, and low friction surfaces. -
The outer sealing mandrel 2140 may be coupled to the upper sealing head 2130 using any number of conventional commercially available mechanical couplings such 30 as, for example, drillpipe connection, oilfield country tubular goods specialty threaded
convection, welding, amorphous bonding or a standard threaded connection. In a
o tin preferred embodiment, the outer sealing mandrel 2140 is removably coupled to the upper sealing head 2130 by a standard threaded connection. The outer sealing mandrel 2140 may be coupled to the expansion cone 2150 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe 5 connection, oilfield country tubular goods specialty threaded connection, welding,
amorphous bonding, or a standard threaded connection. In a preferred embodiment, the outer sealing mandrel 2140 is removably coupled to the expansion cone 2150 by a standard threaded connection.
The upper sealing head 2130, the lower sealing head 2135, inner sealing 10 mandrel 2120, and the outer sealing mandrel 2140 together define a pressure chamber 225(). The pressure chamber 2250 is fluidicly coupled to the passage 2175 via one or more passages 2255. During operation of the apparatus 2100, the plug 2245 engages with the throat passage 2240 to fluidicly isolate the fluid passage 2175 from the fluid passage 2180. The pressure chamber 2250 is then pressurized which in turn causes the 15 upper sealing head 2130, outer sealing mandrel 2140, and expansion cone 2150 to reciprocate in the axial direction. The axial motion of the expansion cone 2150 in turn expands the casing 2155 in the radial direction.
The load mandrel 2145 is coupled to the lower sealing head 2135. The load mandrel 2145 preferably comprises an annular member having substantially cylindrical 20 inner and outer surfaces. The load mandrel 2145 may be fabricated from any number of conventional commercially available materials such as, for example, oilfeld country tubular goods, low alloy steel, carbon steel, stainless steel or other similar high strength materials. In a preferred embodiment, the load mandrel 2145 is fabricated from stainless steel in order to optinially provide high strength, corrosion resistance, 2 5 and low friction bearing surfaces.
The load mandrel 2145 may be coupled to the lower sealing head 2135 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oil field country tubular goods specialty threaded
connection, welding, amorphous bonding or a standard threaded connection. in a 30 preferred embodiment, the load mandrel 2145 is removably coupled to the lower 1 15
o: sealing head 2135 by a standard threaded connection in order to optimally provide high strength and permit easy replacement of the load mandrel 2145.
The load mandrel 2145 preferably includes a fluid passage 2180 that is adapted to convey fluidic materials from the fluid passage 2180 to the region outside of the 5 apparatus 2100. In a preferred embodiment, the fluid passage 2180 is adapted to convey fluidic materials such as, for example, cement, epoxy, water, drilling mud, or lubricants at operating pressures and flow rates ranging from about O to 9,000 psi and 0 to 3,000 gallons/minute.
The expansion cone 2150 is coupled to the outer sealing mandrel 2140. The 10 expansion cone 2150 is also movably coupled to the inner surface of the casing 2155.
In this manner, the upper sealing head 2130, outer sealing mandrel 2140, and the expansion cone 2150 reciprocate in the axial direction. The reciprocation of the expansion cone 2 l 50 causes the casing 2155 to expand in the radial direction.
The expansion cone 2150 preferably comprises an annular member having 15 substantially cylindrical inner and conical outer surfaces. The outside radius of the outside conical surface may range, for example, from about 2 to 34 inches. In a preferred embodiment, the outside radius of the outside conical surface ranges from about 3 to 28 inches in order to optimally provide cone dimensions that are optimal for typical casings. The axial length of the expansion cone 2150 may range, for example, 2 0 from about 2 to 6 times the largest outside diameter of the expansion cone 2150. In a preferred embodiment, the axial length of the expansion cone 2150 ranges fronn about 3 to 5 times the largest outside diameter of the expansion cone 2150 in order to optimally provide stability and centralization of the expansion cone 2150 during the expansion process. In a particularly preferred embodiment, the m=imu.ll outside 2 5 diameter of the expansion cone 2 l 50 is between about 90 to 100 % of the inside diameter of the existing wellbore that the casing 2155 wild be joined with. In a preferred embodiment, the angle of attack of the expansion cone 2150 ranges from about S to 30 degrees in order to optimally balance friction forces and radial expansion forces. The optimal expansion cone 2150 angle of attack will vary as a function of the 3 0 particular operating conditions of the expansion operation.
o : - The expansion cone 2150 may be fabricated from any number of conventional commercially available materials such as, for example, machine tool steel, nitride steel, titanium, tungsten carbide, ceramics, or other similar high strength materials. In a preferred embodiment, the expansion cone 2150 is fabricated from D2 machine tool 5 steel in order to optimally provide high strength and resistance to wear and galling. In a particularly preferred embodiment, the outside surface of the expansion cone 2150 has a surface hardness ranging from about 58 to 62 Rockwell C in order to optimally provide resistance to wear.
The expansion cone 2150 may be coupled to the outside sealing mandrel 2140 10 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfield country tubular goods specialty type
threaded connection, welding, amorphous bonding or a standard threaded connection.
In a preferred embodiment, the expansion cone 2150 is coupled to the outside sealing mandrel 2140 using a standard threaded connection in order to optimally provide high 15 strength and permit the expansion cone 2150 to be easily replaced.
The casing 2155 is removably coupled to the slips 2125 and expansion cone 2150. She casing 2155 preferably comprises a tubular member. The casing 2155 may be fabricated from any number of conventional commercially available materials such as, for example, slotted tubulars, oilfeld country tubular goods, low alloy steel, carbon 2 0 steel, stainless steel or other similar high strength material. In a preferred embodiment, the casing 2155 is fabricated from oilfield country tubular goods available from
various foreign and domestic steel mills in order to optimally provide high strength.
In a preferred embodiment, the upper end 2260 of the casing 2155 includes a thin wall section 2265 and an outer annular sealing member 2270. In a preferred 2 5 embodiment, the wall thickness of the thin wall section 2265 is about 50 to 100 % of the regular wall thickness of the casing 2155. In this manner, the upper end 2260 of the casing 2155 may be easily expanded and deformed into intimate contact with the lower end of an existing section of wellbore casing. In a preferred embodiment, the lower end of the existing section of casing also includes a thin wall section. In this 30 manner, the radial expansion of the thin walled section 2265 of casing 2155 into the
of thin walled section of the existing wellbore casing results in a wellbore casing having a substantially constant inside diameter.
The annular sealing member 2270 may be fabricated from any number of conventional commercially available sealing materials such as, for example, epoxy, 5 rubber, metal or plastic. In a preferred embodiment, the annular sealing member 2270 is fabricated from StrataLock epoxy in order to optimally provide compressibility and resistance to wear. The outside diameter of the annular sealing member 2270 preferably ranges from about 70 to 95 % of the inside diameter of the lower section of the wellbore casing that the casing 2 l S5 is joined to. In this manner, after expansion, 10 the armular sealing member 2270 preferably provides a fluidic seal and also preferably provides sufficient frictional force with the inside surface of the existing section of wellbore casing during the radial expansion of the casing 2 l S5 to support the casing 2155. In a preferred embodiment, the lower end 2275 of the casing 2155 includes a 15 thin wall section 2280 and an outer annular sealing member 2285. In a preferred embodiment, the wall thickness of the thin wall section 2280 is about 50 to l DO % of the regular wall thickness of the casing 2 l 55. In this manner, the lower end 2275 of the casing 2155 may be easily expanded and deformed. Furthermore, in this manner, an other section of casing may be easily joined with the lower end 2275 of the casing 2 0 2155 using a radial expansion process. In a preferred embodiment, the upper end of the other section of casing also includes a thin wall section. In this manner, the radial expansion of the thin walled section of the upper end of the other casing into the thin walled section 2280 ofthe lower end ofthe casing 2155 results in a wellbore casing having a substantially constant inside diameter.
2 5 The annular sealing member 2285 may be fabricated from any number of conventional commercially available sealing materials such as, for example, epoxy, rubber, metal or plastic. In a preferred embodiment, the annular sealing member 2285 is fabricated from StrataLock epoxy in order to optimally provide compressibility and wear resistance. The outside diameter of the annular sealing member 2285 preferably 3 0 ranges from about 70 to 95 % of the inside diameter of the lower section of the existing weilbore casing that the casing 2155 is joined to. In this manner. the annular sealing
o C- member 2285 preferably provides a fluidic seal and also preferably provides sufficient frictional force with the inside wall of the wellbore during the radial expansion of the casing 2155 to support the casing 2155.
During operation, the apparatus 2100 is preferably positioned in a wellbore 5 with the upper end 2260 of the casing 2155 positioned in an overlapping relationship with the lower end of an existing wellbore casing. In a particularly preferred embodiment, the thin wall section 2265 ofthe casing 2155 is positioned in opposing overlapping relation with thethin wall section and outer annular sealing member of the lower end of the existing section of wellbore casing. In this manner, the radial 10 expansion of the casing 2155 will compress the thin wall sections and annular compressible members of the upper end 2260 of the casing 2155 and the lower end of the existing wellbore casing into intimate contact. During the positioning of the apparatus 2100 in the wellbore, the casing 2155 is supported by the expansion cone 15 After positioning of the apparatus 2100, a first fluidic material is then pumped into the fluid passage 2160. The first fluidic material may comprise any number of conventional commercially available materials such as, for example, drilling mud, water, epoxy, or cement. In a preferred embodiment, the first fluidic material comprises a hardenable fluidic sealing material such as, for example, cement or epoxy 20 in order to provide a hardenable outer annular body around the expanded casing 2155.
The first fluidic material may be pumped into the fluid passage 2160 at operating pressures and flow rates ranging, for example, from about O to 4,500 psi and O to 3,000 gallons/minute. In a preferred embodiment, the first fluidic material is pumped into the fluid passage 2160 at operating pressures and flow rates ranging from 25 about 0 to 3,500 psi and 0 to 1, 200 gallons/minute in order to optimally provide operational efficiency.
The first fluidic material pumped into the fluid passage 2160 passes through the fluid passages 2165,2170, 2175, 2180 and then outside ofthe apparatus 2100. The first fluidic material then fills the annular region between the outside of the apparatus 30 2100 and the interior walls ofthe wellbore.
or The plug 2245 is then introduced into the fluid passage 2160. The plug 2245 lodges in the throat passage 2240 and fluidicly isolates and blocks off the fluid passage 2175. In a preferred embodiment, a couple of volumes of a non-hardenable fluidic material are then pumped into the fluid passage 2160 in order to remove any 5 hardenable fluidic material contained within and to ensure that none of the fluid passages are blocked.
A second fluidic material is then pumped into the fluid passage 2160. The second fluidic material may comprise any number of conventional commercially available materials such as, for example, drilling mud, water, drilling gases, or 10 lubricants. In a preferred embodiment, the second fluidic material comprises a non hardenable fluidic material such as, for example, water, drilling mud or lubricant in order to optimally provide pressurization of the pressure chamber 2250 and minimize frictional forces.
The second fluidic material may be pumped into the fluid passage 2160 at 15 operating pressures and flow rates ranging, for example, from about 0 to 4,500 psi and O to 4,500 gallons/minute. In a preferred embodiment, the second fluidic material is pumped into the fluid passage 2160 at operating pressures and flow rates ranging from about O to 3,500 psi and 0 to 1,200 gallons/minute in order to optimally provide operational efficiency.
2 0 The second fluidic material pumped into the fluid passage 2160 passes through the fluid passages 2165, 2170, and 2175 into the pressure chambers 2195 of the slips 2125, and into the pressure chamber 2250. Continued pumping of the second fluidic material pressurizes the pressure chambers 2195 and 2250.
The pressurization of the pressure chambers 2195 causes the slip members 2205 2 5 to expand in the radial direction and grip the interior surface of the casing 2155. The casing 2155 is then preferably maintained in a substantially stationary position.
The pressurization of the pressure chamber 2250 causes the upper sealing head 2130, outer sealing mandrel 2140 and expansion cone 2150 to move in an axial direction relative to the casing 2155. In this manner, the expansion cone 2150 will 30 cause the casing 2155 to expand in the radial direction.
o During the radial expansion process, the casing 2155 is prevented from moving in an upward direction by the slips 2125. A length of the casing 2155 is then expanded in the radial direction through the pressurization of the pressure chamber 2250. The length of the casing 2155 that is expanded during the expansion process will be 5 proportional to the stroke length of the upper sealing head 2130, outer sealing mandrel 2140, and expansion cone 2150.
Upon the completion of a stroke, the operating pressure of the second fluidic material is reduced and the upper sealing head 2130, outer sealing mandrel 2140, and expansion cone 2150 drop to their rest positions with the casing 2155 supported by the 10 expansion cone 2150. The position of the drillpipe 2105 is preferably adjusted throughout the radial expansion process in order to maintain the overlapping relationship between the thin walled sections of the lower end of the existing wellbore casing and the upper end of the casing 2155. In a preferred embodiment, the stroking of the expansion cone 2150 is then repeated, as necessary, until the thin walled section 15 2265 of the upper end 2260 of the casing 2155 is expanded into the thin walled section of the lower end of the existing wellbore casing. In this manner, a wellbore casing is = formed including two adjacent sections of casing having a substantially constant inside diameter. This process may then be repeated for the entirety of the wellbore to provide a wellbore casing thousands of feet in length having a substantially constant inside 20 diameter.
In a preferred embodiment, during the final stroke of the expansion cone 2150, the slips 2125 are positioned as close as possible to the thin walled section 2265 of the upper end of the casing 2155 in order minimize slippage between the casing 2155 and the existing wellbore casing at the end of the radial expansion process. Alternatively, 25 or in addition, the outside diameter of the annular sealing member 2270 is selected to ensure sufficient interference fit with the inside diameter of the lower end of the existing casing to prevent axial displacement ofthe casing 2155 during the final stroke.
Alternatively, or in addition, the outside diameter of the annular sealing member 2285 is selected to provide an interference fit with the inside walls of the wellbore at an 30 earlier point in the radial expansion process so as to prevent further axial displacement of the casing 2155. In this final alternative, the interference fit is preferably selected
on - to permit expansion of the casing 2155 by pulling the expansion cone 2150 out of the wellbore, without having to pressurize the pressure chamber 2250.
During the radial expansion process, the pressurized areas of the apparatus 2100 are limited to the fluid passages 2160, 2165, 2170, and 2175, the pressure 5 chambers 2195 within the slips 2125, and the pressure chamber 2250. No fluid pressure acts directly on the casing 2155. This permits the use of operating pressures higher than the casing 2155 could normally withstand.
Once the casing 2155 has been completely expanded off of the expansion cone 2150, remaining portions of the apparatus 2100 are removed from the wellbore. In a 10 preferred embodiment, the contact pressure between the deformed thin wall sections and compressible annular members of the lower end of the existing casing and the upper end 2260 of the casing 2155 ranges from about 500 to 40,000 psi in order to optimally support the casing 2155 using the existing wellbore casing.
In this manner, the casing 2155 is radially expanded into contact with an 15 existing section of casing by pressurizing the interior fluid passages 2160, 2165, 2170, and 2175 and the pressure chamber 2250 of the apparatus 2100.
In a preferred embodiment, as required, the annular body of hardenable fluidic material is then allowed to cure to form a rigid outer annular body about the expanded casing 2155. In the case where the casing 2155 is slotted, the cured fluidic material 20 preferably permeates and envelops the expanded casing 2155. The resulting new section of wellbore casing includes the expanded casing 2155 and the rigid outer annular body. The overlapping joint between the pre-existing wellbore casing and the expanded casing 2155 includes the deformed thin wall sections and the compressible outer annular bodies. The inner diameter of the resulting combined wellbore casings is 2 5 substantially constant. In this manner, a mono-diameter wellbore casing is formed.
This process of expanding overlapping tubular members having thin wall end portions with compressible annular bodies into contact can be repeated for the entire length of a wellbore. In this manner, a mono- diameter wellbore casing can be provided for thousands of feet in a subterranean formation.
30 In a preferred embodiment, as the expansion cone 2150 nears the upper end of the casing 2155, the operating flow rate of the second fluidic material is reduced in
o order to minimize shock to the apparatus 2100. In an alternative embodiment, the apparatus 2100 includes a shock absorber for absorbing the shock created by the completion of the radial expansion of the casing 2155.
In a preferred embodiment, the reduced operating pressure of the second fluidic 5 material ranges from about 100 to 1,000 psi as the expansion cone 2130 nears the end of the casing 2155 in order to optimally provide reduced axial movement and velocity of the expansion cone 2130. In a preferred embodiment, the operating pressure of the second fluidic material is reduced during the return strolce of the apparatus 2100 to the range of about O to 500 psi in order minimize the resistance to the movement of the 10 expansion cone 2130 during the return stroke. In a preferred embodiment, the stroke length of the apparatus 2100 ranges from about 10 to 45 feet in order to optimally provide equipment lengths that can be handled by conventional oil well rigging equipment while also minimizing the frequency at which the expansion cone 2130 must be stopped so that the apparatus 2100 can be re-stroked.
15 In an alternative embodiment, at least a portion of the upper sealing head 2130 includes an expansion cone for radially expanding the casing 2155 during operation of the apparatus 2100 in order to increase the surface area of the casing 2155 acted upon during the radial expansion process. In this manner, the operating pressures can be reduced. 2 0 Alternatively, the apparatus 2100 may be used to join a first section of pipeline to an existing section of pipeline. Alternatively, the apparatus 2100 may be used to directly line the interior of a wellbore with a casing, without the use of an outer annular layer of a hardenable material. Alternatively, the apparatus 2100 may be used to expand a tubular support member in a hole.
2 5 Referring now to Figures 17, 17a and 17b, another embodiment of an apparatus 2300 for expanding a tubular member will be described. The apparatus 2300 preferably includes a drillpipe 2305, an innerstring adapter 2310, a sealing sleeve 2315, a hydraulic slip body 2320, hydraulic slips 2325, an inner sealing mandrel 2330, an upper sealing head 2335, a lower sealing head 2340, a load mandrel 2345, an outer 30 sealing mandrel 2350, an expansion cone 2355, a mechanical slip body 2360, 12 3
o mechanical slips 236S, drag blocks 2370, casing 2375, fluid passages 2380, 2385, 2390, 2395, 2400, 2405, 2410, 2415, and 2485, and mandrel launcher 2480.
The drillpipe 2305 is coupled to the innerstring adapter 2310. During operation of the apparatus 2300, the drillpipe 2305 supports the apparatus 2300. The drillpipe 5 2305 preferably comprises a substantially hollow tubular member or members. The drillpipe 2305 may be fabricated from any number of conventional commercially available materials such as, for example, oilfield country tubular goods, low alloy
steel, carbon steel, stainless steel or other similar high strength materials. In a preferred embodiment, the drillpipe 2305 is fabricated from coiled tubing in order to 10 facilitate the placement of the apparatus 2300 in non-vertical wellbores. The drillpipe 2305 may be coupled to the innerstring adapter 2310 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfield country tubular goods specialty threaded connection, or a
standard threaded connection. In a preferred embodiment, the drillpipe 2305 is 15 removably coupled to the innerstring adapter 2310 by a drillpipe connection.
The drillpipe 2305 preferably includes a fluid passage 2380 that is adapted to convey fluidic materials from a surface location into the fluid passage 2385. In a preferred embodiment, the fluid passage 23SO is adapted to convey fluidic materials such as, for example, cement, water, epoxy, drilling muds, or lubricants at operating 20 pressures and flow rates ranging from about 0 to 9,000 psi and 0 to 5,000 gallons/minute in order to optimally provide operational efficiency.
The innerstring adapter 2310 is coupled to the drill string 2305 and the sealing sleeve 2315. The innerstring adapter 2310 preferably comprises a substantially hollow tubular member or members. The innerstring adapter 231 n allay be fabricated from 2 5 any number of conventional commercially available materials such as, for example, oilfield country tubular goods, low alloy steel, carbon steel, stainless steel or other
similar high strength materials. In a preferred embodiment, the innerstring adapter 2310 is fabricated from stainless steel in order to optimally provide high strength, corrosion resistance, and low friction surfaces.
30 The innerstring adapter 2310 may be coupled to the drill string 2305 using any nurnDer of conventional commercially available mechanical couplings such as, for
to - - exanple, drillpipe connection, oilfield country tubular goods specialty threaded
connection, or a standard threaded connection. In a preferred embodiment, the innerstring adapter 2310 is removably coupled to the drill pipe 2305 by a dri]lpipe connection. The innerstring adapter 2310 may be coupled to the sealing sleeve 2315 5 using any number of conventional commercially available mechanical couplings such as, for example, a drillpipe connection, oilfield country tubular goods specialty
threaded connection, or a standard threaded connection. In a preferred embodiment, the innerstring adapter 2310 is removably coupled to the sealing sleeve 2315 by a standard threaded connection.
10 The innerstring adapter 2310 preferably includes a fluid passage 2385 that is adapted to convey fluidic materials from the fluid passage 2380 into the fluid passage 2390. In a preferred embodiment, the fluid passage 2385 is adapted to convey fluidic materials such as, for example, cement, epoxy, water, drilling mud, drilling gases or lubricants at operating pressures and flow rates ranging from about O to 9,000 psi and 0 15 to 3, 000 gallons/minute.
The sealing sleeve 2315 is coupled to the innerstring adapter 2310 and the hydraulic slip body 2320. The sealing sleeve 2315 preferably comprises a substantially hollow tubular member or members. The sealing sleeve 2315 may be fabricated from any number of conventional commercially available materials such as, 20 for example, oilfield country tubular goods, low alloy steel, carbon steel, stainless steel
or other similar high strength materials. In a preferred embodiment, the sealing sleeve 2315 is fabricated from stainless steel in order to optimally provide high strength, corrosion resistance, and low-friction surfaces.
The sealing sleeve 2315 may be coupled to the innerstring adapter 2310 using 25 any number of conventional commercially available mechanical couplings such as, for example, drillpipe connections, oilfield country tubular goods specialty threaded
connections, or a standard threaded connection. In a preferred embodiment, the sealing sleeve 2315 is removably coupled to the innerstring adapter 2310 by a standard threaded connection. The sealing sleeve 2315 may be coupled to the hydraulic slip 30 body 2320 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfield country tubular goods
o specialty threaded connection, or a standard threaded connection. In a preferred embodiment, the sealing sleeve 2315 is removably coupled to the hydraulic slip body 2320 by a standard threaded connection.
The sealing sleeve 23 l 5 preferably includes a fluid passage 2390 that is adapted 5 to convey fluidic materials from the fluid passage 2385 into the fluid passage 2395. In a preferred embodiment, the fluid passage 2315 is adapted to convey fluidic materials such as, for example, cement, epoxy, water, drilling mud or lubricants at operating pressures and flow rates ranging from about O to 9,000 psi and 0 to 3,000 gallons/minute. 10 The hydraulic slip body 2320 is coupled to the sealing sleeve 23 l 5, the hydraulic slips 2325, and the inner sealing mandrel 2330. The hydraulic slip body 2320 preferably comprises a substantially hollow tubular member or members. The hydraulic slip body 2320 may be fabricated from any number of conventional commercially available materials such as, for example, oilfield country tubular goods,
15 low alloy steel, carbon steel, stainless steel or other high strength material. In a preferred embodiment, the hydraulic slip body 2320 is fabricated from carbon steel in order to optimally provide high strength at low cost.
The hydraulic slip body 2320 may be coupled to the sealing sleeve 23 l 5 using any number of conventional commercially available mechanical couplings such as, for 2 0 example, drillpipe connection, oilfield country tubular goods specialty threaded
connection, or a standard threaded connection. In a preferred embodiment, the hydraulic slip body 2320 is removably coupled to the sealing sleeve 2315 by a standard threaded connection. The hydraulic slip body 2320 may be coupled to the slips 2325 using any number of conventional commercially available mechanical 25 couplings such as, for example, drillpipe connection, oilfield country tubular goods
specialty threaded connection, welding, amorphous bonding or a standard threaded connection. In a preferred embodiment, the hydraulic slip body 2320 is removably coupled to the slips 2325 by a standard threaded connection. The hydraulic slip body 2320 may be coupled to the inner sealing mandrel 2330 using any number of 30 conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfield country tubular goods specialty threaded connection,
- welding, amorphous bonding or a standard threaded connection. In a preferred embodiment, the hydraulic slip body 2320 is removably coupled to the inner sealing mandrel 2330 by a standard threaded connection.
The hydraulic slips body 2320 preferably includes a fluid passage 2395 that is 5 adapted to convey fluidic materials from the fluid passage 2390 into the fluid passage 2405. In a preferred embodiment, the fluid passage 2395 is adapted to convey fluidic materials such as, for example, cement, epoxy, water, drilling mud or lubricants at operating pressures and flow rates ranging from about O to 9,000 psi and 0 to 3,000 gallons/minute. 10 The hydraulic slips body 2320 preferably includes fluid passage 2400 that are adapted to convey fluidic materials from the fluid passage 2395 into the pressure chambers 2420 of the hydraulic slips 2325. In this manner, the slips 2325 are activated upon the pressurization of the fluid passage 2395 into contact with the inside surface of the casing 2375. In a preferred embodiment, the fluid passages 2400 are adapted to 15 convey fluidic materials such as, for example, water, drilling mud or lubricants at operating pressures and flow rates ranging from about O to 9,000 psi and 0 to 3,000 gallons/minute. The slips 2325 are coupled to the outside surface of the hydraulic slip body 2320. During operation of the apparatus 2300, the slips 2325 are activated upon the 20 pressurization of the fluid passage 2395 into contact with the inside surface of the casing 2375. In this manner, the slips 2325 maintain the casing 2375 in a substantially stationary position.
The slips 2325 preferably include the fluid passages 2400, the pressure chambers 2420, spring bias 2425, and slip members 2430. The slips 2325 may 2 5 comprise any number of conventional commercially available hydraulic slips such as, for example, RTTS packer tungsten carbide hydraulic slips or Model 3L retrievable bridge plug with hydraulic slips. In a preferred embodiment, the slips 2325 comprise RTTS packer tungsten carbide hydraulic slips available from Halliburton Energy Services in order to optimally provide resistance to axial movement of the casing 2375 30 during the radial expansion process.
o C-- The inner sealing mandrel 2330 is coupled to the hydraulic slip body 2320 and the lower sealing head 2340. The inner sealing mandrel 2330 preferably comprises a substantially hollow tubular member or members. The inner sealing mandrel 2330 may be fabricated from any number of conventional commercially available materials 5 such as, for example, oilfield country tubular goods, low alloy steel, carbon steel,
stainless steel or other similar high strength materials. In a preferred embodiment, the inner sealing mandrel 2330 is fabricated from stainless steel in order to optimally provide high strength, corrosion resistance, and low friction surfaces.
The inner sealing mandrel 2330 may be coupled to the hydraulic slip body 2320 10 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfield country tubular goods specialty threaded
connection, welding, amorphous bonding, or a standard threaded connection. In a preferred embodiment, the inner sealing mandrel 2330 is removably coupled to the hydraulic slip body 2320 by a standard threaded connection. The inner sealing 15 mandrel 2330 may be coupled to the lower sealing head 2340 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfield country tubular goods specialty threaded connection,
welding, amorphous bonding, or a standard threaded connection. In a preferred embodiment, the inner sealing mandrel 2330 is removably coupled to the lower sealing 20 head 2340 by a standard threaded connection.
The inner sealing mandrel 2330 preferably includes a fluid passage 2405 that is adapted to convey fluidic materials from the fluid passage 2395 into the fluid passage 2415. In a preferred embodiment, the fluid passage 2405 is adapted to convey fluidic materials such as, for example; cement, epoxy, oyster, drilling mud, or lubricants at 25 operating pressures and flow rates ranging from about 0 to 9,000 psi and 0 to 3,000 gallons/minute. The upper sealing head 2335 is coupled to the outer sealing mandrel 2345 and expansion cone 2355. The upper sealing head 2335 is also movably coupled to the outer surface of the inner sealing mandrel 2330 and the inner surface of the casing 30 2375. In this manner, the upper sealing head 2335 reciprocates in the axial direction.
The radial clearance between the inner cylindrical surface of the upper sealing head
o 2335 and the outer surface of the inner sealing mandrel 2330 may range, for example, from about 0.0025 to 0.05 inches. In a preferred embodiment, the radial clearance between the inner cylindrical surface of the upper sealing head 2335 and the outer surface of the inner sealing mandrel 2330 ranges from about 0.005 to 0.01 inches in 5 order to optimally provide minimal clearance. The radial clearance between the outer cylindrical surface ofthe upper sealing head 2335 and the inner surface ofthe casing 2375 may range, for example, from about 0.025 to 0.375 inches. In a preferred embodiment, the radial clearance between the outer cylindrical surface of the upper sealing head 2335 and the inner surface of the casing 2375 ranges from about 0.025 to 10 0.125 inches in order to optimally provide stabilization for the expansion cone 2355 during the expansion process.
The upper sealing head 2335 preferably comprises an annular member having substantially cylindrical inner and outer surfaces. The upper sealing head 2335 may be fabricated from any number of conventional commercially available materials such as, 15 for example, oilfield country tubular goods, low alloy steel, carbon steel, stainless steel
or other similar high strength materials. In a preferred embodiment, the upper sealing head 2335 is fabricated from stainless steel in order to optimally provide high strength, corrosion resistance, and low friction surfaces. The inner surface of the upper sealing head 2335 preferably includes one or more annular sealing members 2435 for sealing 20 the interface between the upper sealing head 2335 and the inner sealing mandrel 2330.
The sealing members 2435 may comprise any number of conventional commercially available annular sealing members such as, for example, orings, polypak seals or metal spring energized seals. In a preferred embodiment, the sealing members 2435 comprise polypak seals available from Parker Seals in order to optimally provide 25 sealing for a long axial stroke.
In a preferred embodiment, the upper sealing head 2335 includes a shoulder 2440 for supporting the upper sealing head on the lower sealing head 1930.
The upper sealing head 2335 may be coupled to the outer sealing mandrel 2350 using any number of conventional commercially available mechanical couplings such 30 as, for example, drillpipe connection, oilfield country tubular goods specialty threaded
connection, welding, amorphous bonding. or a standard threaded connection. In a
- preferred embodiment, the upper sealing head 2335 is removably coupled to the outer sealing mandrel 2350 by a standard threaded connection. In a preferred embodiment, the mechanical coupling between the upper sealing head 2335 and the outer sealing mandrel 2350 includes one or more sealing members 2445 for fluidicly sealing the 5 interface between the upper sealing head 2335 and the outer sealing mandrel 2350.
The sealing members 2445 may comprise any number of conventional commercially available sealing members such as, for example, o-rings, polypak seals or metal spring energized seals. In a preferred embodiment, the sealing members 2445 comprise polypak seals available from Parker Seals in order to optimally provide sealing for 10 long axial strokes.
The lower sealing head 2340 is coupled to the inner sealing mandrel 2330 and the load mandrel 2345. The lower sealing head 2340 is also movably coupled to the inner surface of the outer sealing mandrel 2350. In this manner, the upper sealing head 2335 and outer sealing mandrel 2350 reciprocate in the axial direction. The radial 15 clearance between the outer surface of the lower sealing head 2340 and the inner surface of the outer sealing mandrel 2350 may range, for example, from about 0.0025 to 0. 05 inches. In a preferred embodiment, the radial clearance between the outer surface of the lower sealing head 2340 and the inner surface of the outer sealing mandrel 2350 ranges from about 0.005 to O.OlO inches in order to optimally provide 20 minimal radial clearance.
The lower sealing head 2340 preferably comprises an annular member having substantially cylindrical inner and outer surfaces. he lower sealing head 2340 may be fabricated from any number of conventional commercially available materials such as, for example, oilfield tuhu!r members, low alloy steel, carbon steel, stainless steel or
25 other similar high strength materials. In a preferred embodiment, the lower sealing head 2340 is fabricated from stainless steel in order to optimally provide high strength, corrosion resistance, and low friction surfaces. The outer surface of the lower sealing head 2340 preferably includes one or more annular sealing members 2450 for sealing the interface between the lower sealing head 2340 and the outer sealing mandrel 2350.
30 The sealing members 2450 may comprise any number of conventioncommercially available annular sealing members such as, for example, orings, polypak seals or
Of- metal spring energized seals. In a preferred embodiment, the sealing members 2450 comprise polypak seals available from Parker Seals in order to optimally provide sealing for a long axial stroke.
The lower sealing head 2340 may be coupled to the inner sealing mandrel 2330 5 using any number of conventional commercially available mechanical couplings such = as, for example, drillpipe connection, oilfeld country tubular specialty threaded connection, welding, amorphous bonding, or standard threaded connection. In a preferred embodiment, the lower sealing head 2340 is removably coupled to the inner sealing mandrel 2330 by a standard threaded connection. In a preferred embodiment, 1 0 the mechanical coupling between the lower sealing head 2340 and the inner sealing mandrel 2330 includes one or more sealing members 2455 for fluidicly sealing the interface between the lower sealing head 2340 and the inner sealing mandrel 2330.
The sealing members 2455 may comprise any number of conventional commercially available sealing members such as, for example, o-rings, polypak or metal spring 1 5 energized seals. In a preferred embodiment, the sealing members 2455 comprise polypak seals available from Parker Seals in order to optimally provide sealing for a long axial stroke length.
The lower sealing head 2340 may be coupled to the load mandrel 2345 using any number of conventional commercially available mechanical couplings such as, for = 20 example, drillpipe connection, oilfeld country tubular goods specialty threaded connection, welding, amorphous bonding or a standard threaded connection. In a preferred embodiment, the lower sealing head 2340 is removably coupled to the load mandrel 2345 by a standard threaded connection. In a preferred embodiment, the mechanical coupling between the lower sealing head 2340 and the load mandrel 2345 2 5 includes one or more sealing members 2460 for fluidicly sealing the interface between the lower seahog head 2340 and the load mandrel 2345. The sealing members 2460 may comprise any number of conventional commercially available sealing members such as, for example, o-rings, polypak seals or metal spring energized seals. In a preferred embodiment, the sealing members 2460 comprise polypak seals available 30 from Parker Seals in order to optimally provide sealing for a long axial stroke length.
c In a preferred embodiment, the lower sealing head 2340 includes a throat passage 2465 fluidicly coupled between the fluid passages 2405 and 2415. The throat passage 2465 is preferably of reduced size and is adapted to receive and engage with a plug 2470, or other similar device. In this manner, the fluid passage 2405 is fluidicly 5 isolated from the fluid passage 2415. In this manner, the pressure chamber 2475 is pressurized. The outer sealing mandrel 2350 is coupled to the upper sealing head 2335 and the expansion cone 2355. The outer sealing mandrel 2350 is also movably coupled to the inner surface of the casing 2375 and the outer surface of the lower sealing head 1 0 2340. In this manner, the upper sealing head 2335, outer sealing mandrel 2350, and the expansion cone 2355 reciprocate in the axial direction. The radial clearance between the outer surface of the outer sealing mandrel 2350 and the inner surface of the casing 2375 may range, for example, from about 0.025 to 0. 375 inches. In a preferred embodiment, the radial clearance between the outer surface of the outer 15 sealing mandrel 2350 and the inner surface of the casing 2375 ranges from about 0.025 to 0.125 inches in order to optimally provide stabilization for the expansion cone 2355 during the expansion process. The radial clearance between the inner surface of the outer sealing mandrel 2350 and the outer surface of the lower sealing head 2340 may range, for example, from about 0.0025 to 0.375 inches. In a preferred embodiment, the 2 0 radial clearance between the inner surface of the outer sealing mandrel 2350 and the outer surface of the lower sealing head 2340 ranges from about 0.005 to 0.010 inches in order to optimally provide minimal clearance.
The outer sealing mandrel 2350 preferably comprises an annular member having substantially cylindrical inner and outer surfaces. The outer sealing mandre! 25 2350 may be fabricated from any number of conventional commercially available materials such as, for example, low alloy steel, carbon steel, stainless steel or other similar high strength materials. In a preferred embodiment, the outer sealing mandrel 2350 is fabricated from stainless steel in order to optimally provide high strength, corrosion resistance, and low friction surfaces.
30 The outer sealing mandrel 2350 may be coupled to the upper sealing head 2335 using any number of conventional commercially available mechanical couplings such
- H i,, q.
as, for example, drillpipe connections, oilfield country tubular goods specialty threaded
connections, welding, amorphous bonding, or a standard threaded connection. In a preferred embodiment, the outer sealing mandrel 2350 is removably coupled to the upper sealing head 2335 by a standard threaded connection. The outer sealing mandrel 5 2350 may be coupled to the expansion cone 2355 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfeld country tubular goods specialty threaded connection, welding, amorphous bonding, or a standard threaded connection. In a preferred embodiment, the outer sealing mandrel 2350 is removably coupled to the expansion cone 2355 by a 10 standard threaded connection.
The upper sealing head 2335, the lower sealing head 2340, the inner sealing mandrel 2330, and the outer sealing mandrel 2350 together define a pressure chamber 2475. The pressure chamber 2475 is fluidicly coupled to the passage 2405 via one or more passages 2410. During operation of the apparatus 2300, the plug 2470 engages 15 with the throat passage 2465 to fluidicly isolate the fluid passage 2415 from the fluid passage 2405. T he pressure chamber 2475 is then pressurized which in turn causes the upper sealing head 2335, outer sealing mandrel 2350, and expansion cone 2355 to reciprocate in the axial direction. The axial motion of the expansion cone 2355 in turn expands the casing 2375 in the radial direction.
20 The load mandrel 2345 is coupled to the lower sealing head 2340 and the mechanical slip body 2360. The load mandrel 2345 preferably comprises an annular member having substantially cylindrical inner and outer surfaces. The load mandrel 2345 may be fabricated from any number of conventional commercially available materials such as, for example, oilfield country tubular goods, low alloy steel, carbon
25 steel, stainless steel or other similar high strength materials. In a preferred embodiment, the load mandrel 2345 is fabricated from stainless steel in order to optimally provide high strength, corrosion resistance, and low friction surfaces.
The load mandrel 2345 may be coupled to the lower sealing head 2340 using any number of conventional commercially available mechanical couplings such as, for 30 example, drillpipe connection, oilfield country tubular goods specialty threaded
connection, welding, amorphous bonding or a standard threaded connection. In a
o C 7. preferred embodiment, the load mandrel 2345 is removably coupled to the lower sealing head 2340 by a standard threaded connection. The load mandrel 2345 may be coupled to the mechanical slip body 2360 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe 5 connection, oilfeld country tubular goods specialty threaded connection, welding, arnophous bonding, or a standard threaded connection. In a preferred embodiment, the load mandrel 2345 is removably coupled to the mechanical slip body 2360 by a standard threaded connection.
The load mandrel 2345 preferably includes a fluid passage 2415 that is adapted 10 to convey fluidic materials from the fluid passage 2405 to the region outside of the apparatus 2300. In a preferred embodiment, the fluid passage 24 l 5 is adapted to convey fluidic materials such as, for example, cement, epoxy, water, drilling mud or lubricants at operating pressures and flow rates ranging from about O to 9,000 psi and 0 to 3,000 gallons/minute.
15 The expansion cone 2355 is coupled to the outer sealing mandrel 2350. T he expansion cone 2355 is also movably coupled to the inner surface of the casing 2375.
In this manner, the upper sealing head 2335, outer sealing mandrel 2350, and the expansion cone 2355 reciprocate in the axial direction. The reciprocation of the expansion cone 2355 causes the casing 2375 to expand in the radial direction.
20 The expansion cone 2355 preferably comprises an annular member having substantially cylindrical inner and conical outer surfaces. The outside radius of the outside conical surface may range, for example, from about 2 to 34 inches. In a preferred embodiment, the outside radius of the outside conical surface ranges from about 3 to 28 inches in order to optimally provide radial expansion of the typical 2 5 casings. The axial length of the expansion cone 2355 may range, for example, from about 2 to 8 times the largest outside diameter of the expansion cone 2355. In a preferred embodiment, the axial length of the expansion cone 2355 ranges from about 3 to 5 times the largest outside diameter of the expansion cone 2355 in order to optimally provide stability and centralization of the expansion cone 2355 during the 30 expansion process. In a preferred embodiment, the angle of attack of the expansion cone 2335 ranges from about 5 to 30 degrees in order to optimally frictional forces
Of with radial expansion forces. The optimum angle of attack of the expansion cone 2355 will vary as a function of the operating parameters of the particular expansion operation. The expansion cone 2355 may be fabricated from any number of conventional 5 commercially available materials such as, for example, machine tool steel, nitride steel, titanium, tungsten carbide, ceramics or other similar high strength materials. In a preferred embodiment, the expansion cone 2355 is fabricated from 02 machine tool steel in order to optimally provide high strength, abrasion resistance, and galling resistance. In a particularly preferred embodiment, the outside surface of the 10 expansion cone 2355 has a surface hardness ranging from about 58 to 62 Rockwell C in order to optimally provide high strength, abrasion resistance, resistance to galling.
The expansion cone 2355 may be coupled to the outside sealing mandrel 2350 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfeld country tubular goods specialty threaded 15 connection, welding, amorphous bonding, or a standard threaded connection. In a preferred embodiment, the expansion cone 2355 is coupled to the outside sealing mandrel 2350 using a standard threaded connection in order to optimally provide high strength and permit the expansion cone 2355 to be easily replaced.
The mandrel launcher 2480 is coupled to the casing 2375. The mandrel 20 launcher 2480 comprises a tubular section of casing having a reduced wall thickness compared to the casing 2375. In a preferred embodiment, the wall thickness of the mandrel launcher 2480 is about 50 to 100 % of the wall thickness of the casing 2375.
In this manner, the initiation of the radial expansion of the casing 2375 is facilitated, and the placement of the apparatus 2300 into a wellbore casing and wellbore is 25 facilitated.
The mandrel launcher 2480 may be coupled to the casing 2375 using any number of conventional mechanical couplings. The mandrel launcher 2480 may have a wall thickness ranging, for example, from about 0.15 to 1.5 inches. In a preferred embodiment, the wall thickness of the mandrel launcher 2480 ranges from about 0.25 30 to 0.75 inches in order to optimally provide high strength in a minimal profile. The mandrel launcher 2480 may be fabricated from any number of conventional
-- commercially available materials such as, for example, oilfield tubular goods, low
alloy steel' carbon steel, stainless steel or other similar high strength materials. In a preferred embodiment, the mandrel launcher 2480 is fabricated from oilfield tubular
goods having a higher strength than that ofthe casing 2375 but with a smaller wall 5 thickness than the casing 2375 in order to optimally provide a thin walled container having approximately the same burst strength as that of the casing 2375.
The mechanical slip body 2460 is coupled to the load mandrel 2345, the mechanical slips 2365, and the drag blocks 2370. The mechanical slip body 2460 preferably comprises a tubular member having an inner passage 2485 fluidicly coupled 1 0 to the passage 2415. In this manner, fluidic materials may be conveyed from the passage 2484 to a region outside of the apparatus 2300.
The mechanical slip body 2360 may be coupled to the load mandrel 2345 using any number of conventional mechanical couplings. In a preferred embodiment, the mechanical slip body 2360 is removably coupled to the load mandrel 2345 using 1 5 threads and sliding steel retaining rings in order to optimally provide a high strength attachment. The mechanical slip body 2360 may be coupled to the mechanical slips 2365 using any number of conventional mechanical couplings. In a preferred embodiment, the mechanical slip body 2360 is removably coupled to the mechanical slips 2365 using threads and sliding steel retaining rings in order to optimally provide a 20 high strength attachment. The mechanical slip body 2360 may be coupled to the drag blocks 2370 using any number of conventional mechanical couplings. In a preferred embodiment, the mechanical slip body 2360 is removably coupled to the drag blocks 2365 using threads and sliding steel retaining rings in order to optimally provide a high strength attachment.
25 The mechanical slips 2365 are coupled to the outside surface ofthe mechanical slip body 2360. During operation of the apparatus 2300, the mechanical slips 2365 prevent upward movement of the casing 2375 and mandrel launcher 2480 In this manner, during the axial reciprocation ofthe expansion cone 2355, the casing 2375 and mandrel launcher 2480 are maintained in a substantially stationary position. In 30 this manner, the mandrel launcher 2480 and casing 2375 are expanded in the radial direction by the axial movement of the expansion cone 2355.
c(- -: The mechanical slips 2365 may comprise any number of conventional commercially available mechanical slips such as, for example, RTTS packer tungsten carbide mechanical slips, RTTS packer wicker type mechanical slips or Model 3L retrievable bridge plug tungsten carbide upper mechanical slips. In a preferred 5 embodiment, the mechanical slips 2365 comprise RTTS packer tungsten carbide mechanical slips available from Halliburton Energy Services in order to optimally provide resistance to axial movement of the casing 2375 during the expansion process.
The drag blocks 2370 are coupled to the outside surface of the mechanical slip body 2360. During operation of the apparatus 2300, the drag blocks 2370 prevent 10 upward movement ofthe casing 2375 and mandrel launcher 2480. In this manner, during the axial reciprocation of the expansion cone 2355, the casing 2375 and mandrel launcher 2480 are maintained in a substantially stationary position. In this manner, the mandrel launcher 2480 and casing 2375 are expanded in the radial == direction by the axial movement of the expansion cone 2355. i 15 The drag blocks 2370 may comprise any number of conventional commercially available mechanical slips such as, for example, RTTS packer mechanical drag blocks or Model 3L retrievable bridge plug drag blocks. In a preferred embodiment? the drag blocks 2370 comprise RTTS packer mechanical drag blocks available from Halliburton Energy Services in order to optimally provide resistance to axial 20 movement of the casing 2375 during the expansion process.
The casing 2375 is coupled to the mandrel launcher 2480. The casing 2375 is further removably coupled to the mechanical slips 2365 and drag blocks 2370. The casing 2375 preferably comprises a tubular member. The casing 2375 may be -
fabricated from any number of conventional commercially available materials such as, 25 for example, slotted tubulars, oil country tubular goods, carbon steel, low alloy steel, stainless steel or other similar high strength materials. In a preferred embodiment, the casing 2375 is fabricated from oilfield country tubular goods available from various -
foreign and domestic steel mills in order to optimally provide high strength. In a preferred embodiment, the upper end of the casing 2375 includes one or more sealing 30 members positioned about the exterior ofthe casing 2375.
During operation, the apparatus 2300 is positioned in a wellbore with the upper end ofthe casing 2375 positioned in an overlapping relationship within an existing wellbore casing. In order minimize surge pressures within the borehole during placement of the apparatus 2300, the fluid passage 2380 is preferably provided with 5 one or more pressure reliefpassages. During the placement ofthe apparatus 2300 in the wellbore, the casing 2375 is supported by the expansion cone 2355.
After positioning of the apparatus 2300 within the bore hole in an overlapping relationship with an existing section of wellbore casing, a first fluidic material is pumped into the fluid passage 2380 from a surface location. The first iluidic material 10 is conveyed from the fluid passage 2380 to the fluid passages 2385, 2390, 2395, 2405, 2415, and 2485. The first fluidic material will then exit the apparatus 2300 and fill the annular region between the outside of the apparatus 2300 and the interior walls of the bore hole.
The first fluidic material may comprise any number of conventional 15 commercially available materials such as, for example, epoxy, drilling mud, slag mix, cement, or water. In a preferred embodiment, the first fluidic material comprises a hardenable fluidic sealing material such as, for example, slag mix, epoxy, or cement.
In this manner, a wellbore casing having an outer annular layer of a hardenable material may be formed.
2 0 The first fluidic material may be pumped into the apparatus 2300 at operating pressures and flow rates ranging, for example, from about O to 4,500 psi, and 0 to 3,000 gallons/minute. In a preferred embodiment, the first fluidic material is pumped into the apparatus 2300 at operating pressures and flow rates ranging from about 0 to 3,500 psi and 0 to 1,200 gallons/minute in order to optimally provide operational 25 efficiency. At a predetermined point in the injection of the first fluidic material such as, for example, after the annular region outside of the apparatus 2300 has been filled to a predetermined level, a plug 2470, dart, or other similar device is introduced into the first fluidic material. The plug 2470 lodges in the throat passage 2465 thereby 30 fluidicly isolating the fluid passage 2405 from the fluid passage 2415.
1 38
to - After placement of the plug 2470 in the throat passage 2465, a second fluidic material is pumped into the fluid passage 2380 in order to pressurize the pressure chamber 2475. The second fluidic material may comprise any number of conventional commercially available materials such as, for example, water, drilling gases, drilling 5 mud or lubricants. In a preferred embodiment, the second fluidic material comprises a nonhardenable fluidic material such as, for example, water, drilling mud or lubricant.
The second fluidic material may be pumped into the apparatus 2300 at operating pressures and flow rates ranging, for example, from about 0 to 4,500 psi and 0 to 4,500 gallons/minute. In a preferred embodiment, the second fluidic material is 10 pumped into the apparatus 2300 at operating pressures and flow rates ranging from about 0 to 3,500 psi and 0 to 1,200 gallons/minute in order to optimally provide operational efficiency.
The pressurization of the pressure chamber 2475 causes the upper sealing head 2335, outer sealing mandrel 2350, and expansion cone 2355 to move in an axial 1 direction. The pressurization of the pressure chamber 2475 also causes the hydraulic slips 2325 to expand in the radial direction and hold the casing 2375 in a substantially stationary position. Furthermore, as the expansion cone 2355 moves in the axial direction, the expansion cone 2355 pulls the mandrel launcher 2480 and drag blocks 2370 along, which sets the mechanical slips 2365 and stops further axial movement of 20 the mandrel launcher 2480 and casing 2375. In this manner, the axial movement of the expansion cone 2355 radially expands the mandrel launcher 2480 and casing 2375.
Once the upper sealing head 2335, outer sealing mandrel 2350, and expansion cone 2355 complete an axial stroke, the operating pressure of the second fluidic material is reduced. The reduction in the operating pressure of the second fluidic 25 material releases the hydraulic slips 2325. The drill string 2305 is then raised. This causes the inner sealing mandrel 2330, lower sealing head 2340, load mandrel 2345, and mechanical slip body 2360 to move upward. This unsets the mechanical slips 2365 and permits the mechanical slips 2365 and drag blocks 2370 to be moved within the mandrel launcher 2480 and casing 2375. When the lower sealing head 2340 30 contacts the upper sealing head 2335, the second fluidic material is again pressurized and the radial expansion process continues. In this manner, the mandrel launcher 2480
o(-- and casing 2375 are radial expanded through repeated axial strokes of the upper sealing head 2335, outer sealing mandrel 2350 and expansion cone 2355. Throughput the radial expansion process, the upper end of the casing 2375 is preferably maintained in an overlapping relation with an existing section of wellbore casing.
5 At the end of the radial expansion process, the upper end of the casing 2375 is expanded into intimate contact with the inside surface of the lower end of the existing wellbore casing. In a preferred embodiment, the sealing members provided at the upper end of the casing 2375 provide a fluidic seal between the outside surface of the upper end of the casing 2375 and the inside surface of the lower end of the existing 10 wellbore casing. In a preferred embodiment, the contact pressure between the casing 2375 and the existing section of wellbore casing ranges from about 400 to l O,OOO psi in order to optimally provide contact pressure, activate the sealing members, and withstand typical tensile and compressive loading conditions.
In a preferred embodiment, as the expansion cone 2355 nears the upper end of 15 the casing 2375, the operating pressure of the second fluidic material is reduced in order to minimize shock to the apparatus 2300. In an alternative embodiment, the apparatus 2300 includes a shock absorber for absorbing the shock created by the completion ofthe radial expansion ofthe casing 2375.
In a preferred embodiment, the reduced operating pressure of the second fluidic 20 material ranges from about l OO to 1,000 psi as the expansion cone 2355 nears the end of the casing 2375 in order to optimally provide reduced axial movement and velocity of the expansion cone 2355. In a preferred embodiment, the operating pressure of the second fluidic material is reduced during the return stroke of the apparatus 2300 to the range of about O to 500 psi in order minimize the resistance to the movement of the 25 expansion cone 2355 during the return stroke. In a preferred embodiment, the stroke length of the apparatus 2300 ranges from about I O to 45 feet in order to optimally provide equipment that can be handled by typical oil well rigging equipment and minimize the frequency at which the expansion cone 2355 must be stopped to permit the apparatus 2300 to be re-stroked.
30 In an alternative embodiment, at least a portion of the upper sealing head 2335 includes an expansion cone for radially expanding the mandrel launcher 2480 and
Cf casing 2375 during operation of the apparatus 2300 in order to increase the surface area of the casing 2375 acted upon during the radial expansion process. In this manner, the operating pressures can be reduced In an alternative embodiment, mechanical slips 2365 are positioned in an axial 5 location between the sealing sleeve 2315 and the inner sealing mandrel 2330 in order to optimally the construction and operation of the apparatus 2300.
Upon the complete radial expansion of the casing 2375, if applicable, the first fluidic material is permitted to cure within the annular region between the outside of the expanded casing 2375 and the interior walls of the wellbore. In the case where the 10 casing 2375 is slotted, the cured fluidic material preferably permeates and envelops the expanded casing 2375. In this manner, a new section of wellbore casing is formed within a wellbore. Alternatively, the apparatus 2300 may be used to join a first section of pipeline to an existing section of pipeline. Alternatively, the apparatus 2300 may be used to directly line the interior of a wellbore with a casing, without the use of an outer 15 annular layer of a hardenable material. Alternatively, the apparatus 2300 may be used to expand a tubular support member in a hole.
During the radial expansion process, the pressurized areas of the apparatus 2300 are limited to the fluid passages 2380, 2385, 2390, 2395, 2400, 2405, and 2410, and the pressure chamber 2475. No fluid pressure acts directly on the mandrel 20 launcher 2480 and casing 2375. This permits the use of operating pressures higher than the mandrel launcher 2480 and casing 2375 could normally withstand.
Referring now to Figure 18, a preferred embodiment of an apparatus 2500 for forming a mono-diameter wellbore casing will be described. The apparatus 2500 preferably includes a drillpipe 2505, an innerstring adapter 2510, a sealing sleeve 25 2515, a hydraulic slip body 2520, hydraulic slips 2525, an inner sealing mandrel 2530, upper sealing head 2535, lower sealing head 2540, outer sealing mandrel 2545, load mandrel 2550, expansion cone 2555, casing 2560, and fluid passages 2565, 2570, 2575,2580, 2585, 2590, 2595, and 2600.
The drillpipe 2505 is coupled to the innerstring adapter 2510. During operation 30 of the apparatus 2500, the drillpipe 2505 supports the apparatus 2500. The drillpipe 2505 preferably comprises a substantially hollow tubular member or members. The
- ( drillpipe 2505 may be fabricated from any number of conventional commercially available materials such as, for example, oilfeld country tubular goods, low alloy steel, carbon steel, stainless steel or other similar high strength materials. In a preferred embodiment, the drillpipe 2505 is fabricated from coiled tubing in order to 5 facilitate the placement of the apparatus 2500 in non-vertical wellbores. The drillpipe 2505 may be coupled to the innerstring adapter 2510 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfield country tubular goods specialty threaded connection, or a
standard threaded connection. In a preferred embodiment, the drillpipe 2505 is 10 removably coupled to the innerstring adapter 2S I O by a drillpipe connection. a drillpipe connection provides the advantages of high strength and easy disassembly The drillpipe 2505 preferably includes a fluid passage 2565 that is adapted to convey iluidic materials from a surface location into the fluid passage 2570. In a preferred embodiment, the fluid passage 2565 is adapted to convey fluidic materials 15 such as, for example, cement, epoxy, water, drilling mud, or lubricants at operating pressures and flow rates ranging from about O to 9,000 psi and 0 to 3,000 gal lons/minute.
The innerstring adapter 2510 is coupled to the drill string 2505 and thesealing sleeve 2515. The innerstring adapter 2510 preferably comprises a substantially hollow 2 0 tubular member or members. The innerstring adapter 2510 may be fabricated from any number of conventional commercially available materials such as, for example, oilfeld country tubular goods, low alloy steel, carbon steel, stainless steel or other similar high strength materials. In a preferred embodiment, the innerstring adapter 251 n is fabricated from stainless steel in order to optimally provide high strength, 2 5 corrosion resistance, and low friction surfaces.
The innerstring adapter 2510 may be coupled to the drill string 2505 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfield country tubular goods specialty type threaded
connection, or a standard threaded connection. In a preferred embodiment, the 30 innerstring adapter 2510 is removably coupled to the drill pipe 2505 by a drillpipe connection. The innerstring adapter 2510 may be coupled to the sealing sleeve 2515
l using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfield country tubular goods specialty type
threaded connection, ratchet-latch type threaded connection or a standard threaded connection. In a preferred embodiment, the innerstring adapter 25 l O is removably 5 coupled to the sealing sleeve 25 l 5 by a standard threaded connection.
The innerstring adapter 25 l O preferably includes a fluid passage 2570 that is adapted to convey fluidic materials from the fluid passage 2565 into the fluid passage 2575. In a preferred embodiment, the fluid passage 2570 is adapted to convey fluidic materials such as, for example, cement, epoxy, water, drilling mud or lubricants at 10 operating pressures and flow rates ranging from about 0 to 9,000 psi and 0 to 3,000 gallons/minute. The sealing sleeve 25 l S is coupled to the innerstring adapter 25 l O and the hydraulic slip body 2520. The sealing sleeve 25 l 5 preferably comprises a substantially hollow tubular member or members. The sealing sleeve 2515 may be 15 fabricated from any number of conventional commercially available materials such as, for example, oilfield country tubular goods, low alloy steel, carbon steel, stainless steel
or other similar high strength materials. In a preferred embodiment, the sealing sleeve 25 l 5 is fabricated from stainless steel in order to optimally provide high strength, corrosion resistance, and low-friction surfaces.
20 The sealing sleeve 2515 may be coupled to the innerstring adapter 2510 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connections, oilfeld country tubular goods specialty type threaded connection, ratchet-latch type threaded connection, or a standard threaded connection.
In a preferred embodiment, the sealing sleeve 25 l 5 is removably coupled to the 25 innerstring adapter 25 lO by a standard threaded connection. The sealing sleeve 25 l 5 may be coupled to the hydraulic slip body 2520 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfeld country tubular goods specialty type threaded connection, ratchet latch type threaded connection, or a standard threaded connection. In a preferred 30 embodiment, the sealing sleeve 2515 is removably coupled to the hydraulic slip body 2520 by a standard threaded connection.
o The sealing sleeve 2515 preferably includes a fluid passage 2575 that is adapted to convey fluidic materials from the fluid passage 2570 into the fluid passage 2580. In a preferred embodiment, the fluid passage 2575 is adapted to convey fluidic materials such as, for example, cement, epoxy, water, drilling mud or lubricants at operating 5 pressures and flow rates ranging from about 0 to 9,000 psi and 0 to 3,000 gallons/minute. The hydraulic slip body 2520 is coupled to the sealing sleeve 2515, the hydraulic slips 2525, and the inner sealing mandrel 2530. The hydraulic slip body 2520 preferably comprises a substantially hollow tubular member or members. The 10 hydraulic slip body 2520 may be fabricated from any number of conventional commercially available materials such as, for example, oilfield country tubular goods,
low alloy steel, carbon steel, stainless steel or other similar high strength materials. In a preferred embodiment, the hydraulic slip body 2520 is fabricated from carbon steel in order to optimally provide high strength.
15 The hydraulic slip body 2520 may be coupled to the sealing sleeve 2515 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfield country tubular goods specialty type threaded
connection, ratchet-latch type threaded connection or a standard threaded connection.
In a preferred embodiment, the hydraulic slip body 2520 is removably coupled to the 2 0 sealing sleeve 2515 by a standard threaded connection. The hydraulic slip body 2520 may be coupled to the slips 2525 using any number of conventional commercially available mechanical couplings such as, for example, threaded connection or welding.
In a preferred embodiment, the hydraulic slip body 2520 is removably coupled to the slips 2525 by a threaded connection. The hydraulic slip body 2520 may be coupled to 5 the inner sealing mandrel 2530 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfield
country tubular goods specialty type threaded connection' welding, amorphous bonding or a standard threaded connection. In a preferred embodiment, the hydraulic slip body 2520 is removably coupled to the inner sealing mandrel 2530 by a standard 30 threaded connection.
The hydraulic slips body 2520 preferably includes a fluid passage 2580 that is adapted to convey fluidic materials from the fluid passage 2575 into the fluid passage 2590. In a preferred embodiment, the fluid passage 2580 is adapted to convey 11uidic materials such as, for example, cement, epoxy, water, drilling mud or lubricants at 5 operating pressures and flow rates ranging from about 0 to 9,000 psi and 0 to 3,000 gal lons/minute.
The hydraulic slips body 2520 preferably includes fluid passages 2585 that are adapted to convey fluidic materials from the fluid passage 2580 into the pressure chambers of the hydraulic slips 2525. In this manner, the slips 2525 are activated upon 10 the pressurization of the fluid passage 2580 into contact with the inside surface of the casing 2560. In a preferred embodiment, the fluid passages 2585 are adapted to convey fluidic materials such as, for example, water, drilling mud or lubricants at operating pressures and flow rates ranging from about O to 9,000 psi and 0 to 3,000 gallons/minute. 15 The slips 2525 are coupled to the outside surface of the hydraulic slip body 2520. During operation of the apparatus 2500, the slips 2525 are activated upon the pressurization of the fluid passage 2580 into contact with the inside surface of the casing 2560. In this manner, the slips 2525 maintain the casing 2560 in a substantially stationary position.
20 The slips 2525 preferably include the fluid passages 2585, the pressure chambers 2605, spring bias 2610, and slip members 2615. The slips 2525 may comprise any number of conventional commercially available hydraulic slips such as, for example, RTTS packer tungsten carbide hydraulic slips or Model 3L retrievable bridge plug with hydraulic slips. In a preferred embodiment, the slips 2525 comprise 25 RTTS packer tungsten carbide hydraulic slips available from Halliburton Energy Services in order to optimally provide resistance to axial movement of the casing 2560 z during the expansion process.
The inner sealing mandrel 2530 is coupled to the hydraulic slip body 2520 and the lower sealing head 2540. The inner sealing mandrel 2530 preferably comprises a 30 substantially hollow tubular member or members. The inner sealing mandrel 2530 may be fabricated from any number of conventional commercially available materials
r f . such as, for example, oilfield country tubular goods, low alloy steel, carbon steel,
stainless steel or other similar high strength materials. In a preferred embodiment, the inner sealing mandrel 2530 is fabricated from stainless steel in order to optimally provide high strength, corrosion resistance, and low friction surfaces.
5 The inner sealing mandrel 2530 may be coupled to the hydraulic slip body 2520 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfield country tubular goods specialty type
threaded connection, welding, amorphous bonding, or a standard threaded connection.; In a preferred embodiment, the inner sealing mandrel 2530 is removably coupled to the 1 0 hydraulic slip body 2520 by a standard threaded connection. The inner sealing mandrel 2530 may be coupled to the lower sealing head 2540 using any number of conventional commercially available mechanical couplings such as, for example, oilfield country tubular goods specialty type threaded connection, drillpipe connection,
welding, amorphous bonding, or a standard threaded connection. In a preferred 15 embodiment, the inner sealing mandrel 2530 is removably coupled to the lower sealing head 2540 by a standard threaded connection.
The inner sealing mandrel 2530 preferably includes a fluid passage 2590 that is adapted to convey fluidic materials from the fluid passage 2580 into the fluid passage 2600. In a preferred embodiment, the fluid passage 2590 is adapted to convey fluidic 2 0 materials such as, for example, cement, epoxy, water, drilling mud or lubricants at operating pressures and flow rates ranging from about O to 9,000 psi and 0 to 3,000 gallons/minute. The upper sealing head 2535 is coupled to the outer sealing mandrel 2545 and expansion cone 2555. The upper sealing head 2535 is also movably coupled to the 2 5 outer surface of the inner sealing mandrel 2530 and the inner surface of the casing 2560. In this manner? the upper sealing head 2535 reciprocates in the axial direction.
The radial clearance between the inner cylindrical surface of the upper sealing head 2535 and the outer surface of the inner sealing mandrel 2530 may range, for example, from about 0.0025 to O.OS inches. In a preferred embodiment, the radial clearance 3 0 between the inner cylindrical surface of the upper sealing head 2535 and the outer surface oftne inner sealing mandrel 2530 ranges from about 0.005 to 0.01 inches in
order to optimally provide minimal radial clearance. The radial clearance between the outer cylindrical surface of the upper sealing head 2535 and the inner surface of the casing 2560 may range, for example, from about 0. 025 to 0.375 inches. In a preferred embodiment, the radial clearance between the outer cylindrical surface of the upper 5 sealing head 2535 and the inner surface of the casing 2560 ranges from about 0.025 to 0.125 inches in order to optimally provide stabilization for the expansion cone 2535 during the expansion process.
The upper sealing head 2535 preferably comprises an annular member having substantially cylindrical inner and outer surfaces. The upper sealing head 2535 may be 10 fabricated from any number of conventional commercially available materials such as, for example, oilfield country tubular goods, low alloy steel, carbon steel, stainless steel
or other similar high strength materials. In a preferred embodiment, the upper sealing head 2535 is fabricated from stainless steel in order to optimally provide high strength, corrosion resistance, and low friction surfaces. The inner surface of the upper sealing 15 head 2535 preferably includes one or more annular sealing members 2620 for sealing the interface between the upper sealing head 2535 and the inner sealing mandrel 2530.
The sealing members 2620 may comprise any number of conventional commercially available annular sealing members such as, for example, orings, polypak seals, or metal spring energized seals. In a preferred embodiment, the sealing members 2620 2 0 comprise polypak seals available from Parker Seals in order to optimally provide sealing for a long axial stroke.
In a preferred embodiment, the upper sealing head 2535 includes a shoulder 2625 for supporting the upper sealing head 2535, outer sealing mandrel 2545, and expansion cone 2555 on the lower sealing head 2540.
2 5 The upper sealing head 2535 may be coupled to the outer sealing mandrel 2545 using any number of conventional commercially available mechanical couplings such as, for example, oilfield country tubular goods specialty threaded connection, pipeline
connection, welding, amorphous bonding, or a standard threaded connection. In a preferred embodiment, the upper sealing head 2535 is removably coupled to the outer 30 sealing mandrel 2545 by a standard threaded connection. In a preferred embodiment, the mechanical coupling between the upper sealing head 2535 and the outer sealing
mandrel 2545 includes one or more sealing members 2630 for fluidicly sealing the interface between the upper sealing head 2S35 and the outer sealing mandrel 2545.
The sealing members 2630 may comprise any number of conventional commercially available sealing members such as, for example, o-rings, polypak seals or metal spring 5 energized seals. In a preferred embodiment, the sealing members 2630 comprise polypak seals available from Parker Seals in order to optimally provide sealing for a long axial stroke.
The lower sealing head 2540 is coupled to the inner sealing mandrel 2530 and the load mandrel 2550. The lower sealing head 2540 is also movably coupled to the 1 0 inner surface of the outer sealing mandrel 2545. In this manner. the upper sealing head 2535? outer sealing mandrel 2545, and expansion cone 2S55 reciprocate in the axial direction. The radial clearance between the outer surface of the lower sealing head 2540 and the inner surface of the outer sealing mandrel 2545 may range' for example, from 15 about 0.0025 to 0.05 inches. In a preferred embodiment, the radial clearance between the outer surface of the lower sealing head 2540 and the inner surface of the outer sealing mandrel 2545 ranges from about 0.005 to 0.01 inches in order to optimally provide minimal radial clearance.
The lower sealing head 2540 preferably comprises an annular member having 20 substantially cylindrical inner and outer surfaces. The lower sealing head 2540 may be fabricated from any number of conventional commercially available materials such as, for example, oilfield country tubular goods, low alloy steel, carbon steel, stainless steel
or other similar high strength materials. In a preferred embodiment, the lower sealing head 2540 is fabricated from stainless stee! in order to optimally provide high strength, 25 corrosion resistance, and low friction surfaces. The outer surface of the lower sealing head 2540 preferably includes one or more annular sealing members 2635 for sealing the interface between the lower sealing head 2540 and the outer sealing mandrel 2545.
The sealing members 2635 may comprise any number of conventional commercially available annular sealing members such as, for example, orings, polypak seals, or 30 metal spring energized seals. In a preferred embodiment, the sealing members 2635
I, - comprise polypak seals available from Parker Seals in order to optimally provide sealing for a long axial stroke. -
The lower sealing head 2540 may be coupled to the inner sealing mandrel 2530 using any number of conventional commercially available mechanical couplings such S as, for example, drillpipe connections, oilfield country tubular goods specialty threaded
connection, or a standard threaded connection. In a preferred embodiment, the lower sealing head 2540 is removably coupled to the inner sealing mandrel 2530 by a standard threaded connection. In a preferred embodiment, the mechanical coupling between the lower sealing head 2540 and the inner sealing mandrel 2530 includes one 10 or more sealing members 2640 for fluidicly sealing the interface between the lower sealing head 2540 and the inner sealing mandrel 2530. The sealing members 2640 may comprise any number of conventional commercially available sealing members such as, for example, wrings, polypak seals or metal spring energized seals. In a -.
preferred embodiment, the sealing members 2640 comprise polypak seals available 15 from Parker Seals in order to optimally provide sealing for a long axial stroke.
The lower sealing head 2540 may be coupled to the load mandrel 2550 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfield country tubular goods specialty type threaded
connection, welding, amorphous bonding or a standard threaded connection. In a 20 preferred embodiment, the lower sealing head 2540 is removably coupled to the load mandrel 2550 by a standard threaded connection. In a preferred embodiment, the mechanical coupling between the lower sealing head 2540 and the load mandrel 2550 includes one or more sealing members 2645 for fluidicly sealing the interface between the lower sealing head 2540 and the load mandrel 2S50. The sealing members 2645 2 5 may comprise any number of conventional commercially available sealing members such as, for example, o-rings, polypak seals or metal spring energized seals. In a preferred embodiment, the sealing members 2645 comprise polypak seals available from Parker Seals in order to optimally provide sealing for a long axial stroke.
* In a preferred embodiment, the lower sealing head 2540 includes a throat 30 passage 2650 fluidicly coupled between the fluid passages 2590 and 2600. The throat passage 2650 is preferably of reduced size and is adapted to receive and engage with a
plug 2655, or other similar device. In this manner, the fluid passage 2590 is fluidicly isolated from the fluid passage 2600. In this manner, the pressure chamber 2660 is pressurized. The outer sealing mandrel 2545 is coupled to the upper sealing head 2535 and 5 the expansion cone 2555. The outer sealing mandrel 2545 is also movably coupled to the inner surface of the casing 2560 and the outer surface of the lower sealing head 2540. In this manner, the upper sealing head 2535, outer sealing mandrel 2545, and the expansion cone 2555 reciprocate in the axial direction. The radial clearance between the outer surface of the outer sealing mandrel 2545 and the inner surface of 10 the casing 2560 may range, for example, from about 0.025 to 0.375 inches. In a preferred embodiment, the radial clearance between the outer surface of the outer sealing mandrel 2545 and the inner surface of the casing 2560 ranges from about 0.025 to 0.125 inches in order to optimally provide stabilization for the expansion cone 2535 during the expansion process. The radial clearance between the inner surface of the 15 outer sealing mandrel 2545 and the outer surface of the lower sealing head 2540 may range, for example, from about 0.005 to 0.01 inches. In a preferred embodiment, the radial clearance between the inner surface of the outer sealing mandrel 2545 and the outer surface of the lower sealing head 2540 ranges from about 0.005 to 0.01 inches in order to optimally provide minimal radial clearance.
20 The outer sealing mandrel 2545 preferably comprises an annular member having substantially cylindrical inner and outer surfaces. The outer sealing mandrel 2545 may be fabricated from any number of conventional commercially available materials such as, for example, oilfield country tubular goods, low alloy steel' carbon
steel, stainless steel or other similar high strength materials. In a preferred 25 embodiment, the outer sealing mandrel 2545 is fabricated from stainless steel in order to optimally provide high strength, corrosion resistance, and low friction surfaces.
The outer sealing mandrel 2545 may be coupled to the upper sealing head 2535 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfeld country tubular goods specialty type 30 threaded connection, welding, arnophous bonding, or a standard threaded correction.
In a preferred embodiment, the outer sealing mandrel 2545 is remov-ablv coupled to the
upper sealing head 2535 by a standard threaded connection. The outer sealing mandrel 2545 may be coupled to the expansion cone 2555 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfield country tubular goods specialty type threaded connection, welding,
5 amorphous bonding, or a standard threaded connection. In a preferred embodiment, the outer sealing mandrel 2545 is removably coupled to the expansion cone 2555 by a standard threaded connection.
The upper sealing head 2535, the lower sealing head 2540, the inner sealing mandrel 2530, and the outer sealing mandrel 2545 together define a pressure chamber 10 2660. The pressure chamber 2660 is fluidicly coupled to the passage 2590 via one or more passages 2595. During operation of the apparatus 2500, the plug 2655 engages with the throat passage 2650 to fluidicly isolate the fluid passage 2590 from the fluid passage 2600. The pressure chamber 2660 is then pressurized which in turn causes the upper sealing head 2535, outer sealing mandrel 2545, and expansion cone 2555 to 15 reciprocate in the axial direction. The axial motion of the expansion cone 2555 in turn expands the casing 2560 in the radial direction.
The load mandrel 2550 is coupled to the lower sealing head 2540. The load mandrel 2550 preferably comprises an annular member having substantially cylindrical inner and outer surfaces. The load mandrel 2550 may be fabricated from any number 20 of conventional commercially available materials such as, for example, oilfield country
tubular goods, low alloy steel, carbon steel, stainless steel or other similar high strength materials. In a preferred embodiment, the load mandrel 2550 is fabricated from stainless steel in order to optimally provide high strength, corrosion resistance, and low friction surfaces.
25 The load mandrel 2550 may be coupled to the lower sealing head 2540 using any number of conventional commercially available mechanical couplings such as, for example, oilfeld country tubular goods, drillpipe connection, welding, amorphous bonding, or a standard threaded connection. In a preferred embodiment, the load mandrel 2550 is removably coupled to the lower sealing head 2540 by a standard 30 threaded connection.
The load mandrel 2550 preferably includes a fluid passage 2600 that is adapted to convey fluidic materials from the fluid passage 2590 to the region outside of the apparatus 2500. In a preferred embodiment, the fluid passage 2600 is adapted to convey fluidic materials such as, for example' cement, epoxy, water, drilling mud, or 5 lubricants at operating pressures and flow rates ranging, for example, from about 0 to 9,000 psi and 0 to 3,000 gallons/minute.
The expansion cone 2555 is coupled to the outer sealing mandrel 2545. The expansion cone 2555 is also movably coupled to the inner surface of the casing 2560.
In this manner, the upper sealing head 2535, outer sealing mandrel 2545, and the 1 0 expansion cone 2555 reciprocate in the axial direction. The reciprocation of the expansion cone 2555 causes the casing 2560 to expand in the radial direction.
The expansion cone 2555 preferably comprises an annular member having substantially cylindrical inner and conical outer surfaces. The outside radius of the outside conical surface may range, for example, from about 2 to 34 inches. In a 15 preferred embodiment, the outside radius of the outside conical surface ranges from about 3 to 28 in order to optimally provide radial expansion for the widest variety of tubular casings. The axial length of the expansion cone 2555 may range, for example, from about 2 to 8 times the largest outside diameter of the expansion cone 2535. In a preferred embodiment, the axial length ofthe expansion cone 2535 ranges from about 2 0 3 to 5 times the largest outside diameter of the expansion cone 2535 in order to optimally provide stabilization and centralization of the expansion cone 2535 during the expansion process. In a particularly preferred embodiment, the maximum outside diameter of the expansion cone 2555 is between about 95 to 99 % of the inside diameter of the existing wellbore that the casing 256u will be Joined with. In a 2 5 preferred embodiment, the angle of attack of the expansion cone 2555 ranges from about 5 to 30 degrees in order to optimally balance frictional forces and radial expansion forces. The optimum angle of attack of the expansion cone 2535 will vary as a function of the particular operational features of the expansion operation.
T he expansion cone 2555 may be fabricated from any number of conventional 3 0 commercially available materials such as, for example, machine tool steel; nitride steel, titanium, tungsten carbide, ceramics or other similar high strength materials. In a
l preferred embodiment, the expansion cone 2555 is fabricated from D2 machine tool steel in order to optimally provide high strength, and resistance to wear and galling. In a particularly preferred embodiment, the outside surface of the expansion cone 2555 has a surface hardness ranging from about 58 to 62 Rockwell C in order to optimally 5 provide high strength and wear resistance.
The expansion cone 2555 may be coupled to the outside sealing mandrel 2545 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfield country tubular goods specialty threaded
connection, welding, amorphous bonding or a standard threaded connection. In a 10 preferred embodiment, the expansion cone 2555 is coupled to the outside sealing mandrel 2545 using a standard threaded connection in order to optimally provide high strength and easy replacement of the expansion cone 2555.
The casing 2560 is removably coupled to the slips 2525 and expansion cone 2555. The casing 2560 preferably comprises a tubular member. The casing 2560 may 15 be fabricated from any number of conventional commercially available materials such as, for example, slotted tubulars, oilfeld country tubular goods, low alloy steel, carbon steel, stainless steel or other similar high strength materials. In a preferred embodiment, the casing 2560 is fabricated from oilfield country tubular goods
available from various foreign and domestic steel mills in order to optimally provide 20 high strength using standardized materials.
In a preferred embodiment, the upper end 2665 of the casing 2560 includes a thin wall section 2670 and an outer annular sealing member 2675. In a preferred embodiment, the wall thickness of the thin wall section 2670 is about 50 to l OO % of the regular wall thickness of the casing 2560. In this manner, the upper end 2665 of 25 the casing 2560 may be easily radially expanded and deformed into intimate contact with the lower end of an existing section of wellbore casing. In a preferred embodiment, the lower end of the existing section of casing also includes a thin wall section. In this manner, the radial expansion of the thin walled section 2670 of casing 2560 into the thin walled section of the existing wellbore casing results in a wellbore 30 casing having a substantially constant inside diameter.
$ The annular sealing member 2675 may be fabricated from any number of conventional commercially available sealing materials such as, for example, epoxy, rubber, metal, or plastic. In a preferred embodiment, the annular sealing member 2675 is fabricated from StrataLock epoxy in order to optimally provide compressibility and 5 resistance to wear. The outside diameter of the annular sealing member 2675 preferably ranges from about 70 to 95 % of the inside diameter of the lower section of the wellborecasing that the casing 2560 is joined to. In this manner, after radial expansion, the annular sealing member 2670 optimally provides a fluidic seal and also preferably optimally provides sufficient frictional force with the inside surface of the 10 existing section of wellbore casing during the radial expansion of the casing 2560 to support the casing 2560.
In a preferred embodiment, the lower end 2680 of the casing 2560 includes a thin wall section 2685 and an outer annular sealing member 2690. In a pretested embodiment, the wall thickness of the thin wall section 2685 is about 50 to lOO % of 1 5 the regular wall thickness of the casing 2560. In this manner, the lower end 2680 of the casing 2560 may be easily expanded and deformed. Furthermore, in this manner, an other section of casing may be easily joined with the lower end 2680 of the casing 2560 using a radial expansion process. In a preferred embodiment, the upper end of the other section of casing also includes a thin wall section. In this manner, the radial O expansion of the thin walled section of the upper end of the other casing into the thin walled section 2685 of the lower end 2680 of the casing 2560 results in a wellbore casing having a substantially constant inside diameter.
The annular sealing member 2690 may be fabricated from any number of conventional commercially available sealing materials such as, for example, rubber, 25 metal, plastic or epoxy. In a preferred embodiment, the annular sealing member 2690 is fabricated from StrataLock epoxy in order to optimally provide compressibility and resistance to wear. The outside diameter of the annular sealing member 2690 preferably ranges from about 70 to 95 % of the inside diameter of the lower section of the existing wellbore casing that the casing 2560 is joined to. In this manner, after 30 radial expansion, the annular sealing member 2690 preferably provides a fluidic seal
and also preferably provides sufficient frictional force with the inside wall of the wellbore during the radial expansion of the casing 2560 to support the casing 2560.
During operation, the apparatus 2500 is preferably positioned in a wellbore with the upper end 2665 of the casing 2560 positioned in an overlapping relationship 5 with the lower end of an existing wellbore casing. In a particularly preferred embodiment, the thin wall section 2610 of the casing 2560 is positioned in opposing overlapping relation with the thin wall section and outer annular sealing member of the lower end of the existing section of wellbore casing. In this manner, the radial expansion of the casing 2560 will compress the thin wall sections and annular 1 0 compressible members of the upper end 2665 of the casing 2560 and the lower end of the existing wellbore casing into intimate contact. During the positioning of the apparatus 2500 in the wellbore, the casing 2560 is supported by the expansion cone 2555. After positioning of the apparatus 2500, a first fluidic material is then pumped 15 into the fluid passage 2565. The first fluidic material may comprise any number of conventional commercially available materials such as, for example, cement, water, slag-mix, epoxy or drilling mud. In a preferred embodiment, the first fluidic material comprises a hardenable fluidic sealing material such as, for example, cement, epoxy, or slag-mix in order to optimally provide a hardenable outer annular body around the 2 0 expanded casing 2560.
The first fluidic material may be pumped into the fluid passage 2565 at operating pressures and flow rates ranging, for example, from about O to 4,500 psi and O to 3,000 gallons/minute. In a preferred embodiment, the first fluidic material is pumped into the fluid passage 2565 at operating pressures and flow rates ranging from 2 5 about 0 to 3,500 psi and 0 to 1, 200 gallons/minute in order to optimally provide operational efficiency.
The first fluidic material pumped into the fluid passage 2565 passes through the fluid passages 2570, 2575, 2580, 2590, 2600 and then outside of the apparatus 2500.
The first fluidic material then preferably fills the annular region between the outside of 3 0 the apparatus 2500 and the interior walls of the wellbore.
s 7l - - The plug 2655 is then introduced into the fluid passage 2565. The plug 2655 lodges in the throat passage 2650 and fluidicly isolates and blocks off the fluid passage 2590. In a preferred embodiment, a couple of volumes of a non-hardenable fluidic material are then pumped into the fluid passage 2565 in order to remove any 5 hardenable fluidic material contained within and to ensure that none of the fluid passages are blocked.
A second fluidic material is then pumped into the fluid passage 2565. The second iluidic material may comprise any number of conventional commercially available materials such as, for example, water, drilling gases, drilling mud or 10 lubricant. In a preferred embodiment, the second fluidic material comprises a non= hardenable fluidic material such as, for example, water, drilling mud, or lubricant in order to optimally provide pressurization of the pressure chamber 2660 and minimize friction. The second fluidic material may be pumped into the fluid passage 2565 at 1 5 operating pressures and flow rates ranging, for example, from about 0 to 4,500 psi and O to 4,500 gallons/minute. In a preferred embodiment, the second fluidic material is pumped into the fluid passage 2565 at operating pressures and flow rates ranging from about O to 3,500 psi and 0 to 1,200 gallons/minute in order to optimally provide operational efficiency.
2 0 The second fluidic material pumped into the fluid passage 2565 passes through the fluid passages 2570, 2575' 2580, 2590 and into the pressure chambers 2605 of the slips 2525, and into the pressure chamber 2660. Continued pumping of the second fluidic material pressurizes the pressure chambers 2605 and 2660.
The pressurization of the pressure chambers 26uS causes the slip members 2525 25 to expand in the radial direction and grip the interior surface of the casing 2560. The casing 2560 is then preferably maintained in a substantially stationary position.
The pressurization of the pressure chamber 2660 causes the upper sealing head 2535, outer sealing mandrel 2545 and expansion cone 2555 to move in an axial direction relative to the casing 2560. In this manner, the expansion cone 2555 will 30 cause the casing 2560 to expand in the radial direction, beginning with the lower end 2685 of the casing 2560.
i56
By) - During the radial expansion process, the casing 2560 is prevented from moving in an upward direction by the slips 2525. A length of the casing 2560 is then expanded in the radial direction through the pressurization of the pressure chamber 2660. The length of the casing 2560 that is expanded during the expansion process will be 5 proportional to the stroke length ofthe upper sealing head 2535, outer sealing mandrel 2545, and expansion cone 2555.
Upon the completion of a stroke, the operating pressure of the second fluidic material is reduced and the upper sealing head 2535, outer sealing mandrel 2545' and expansion cone 2555 drop to their rest positions with the casing 2560 supported by the 10 expansion cone 2555. The position ofthe drillpipe 2505 is preferably adjusted throughout the radial expansion process in order to maintain the overlapping relationship between the thin walled sections of the lower end of the existing wellbore casing and the upper end of the casing 2560. In a preferred embodiment, the stroking of the expansion cone 2555 is then repeated, as necessary, until the thin walled section 15 2670 of the upper end 2665 of the casing 2560 is expanded into the thin walled section of the lower end of the existing wellbore casing. In this manner, a wellbore casing is formed including two adjacent sections of casing having a substantially constant inside diameter. This process may then be repeated for the entirety of the wellbore to provide a wellbore casing thousands of feet in length having a substantially constant inside 20 diameter.
In a preferred embodiment, during the final stroke of the expansion cone 2555, the slips 2525 are positioned as close as possible to the thin walled section 2670 of the upper end 2665 of the casing 2560 in order minimize slippage between the casing 2560 and the existing wellbore casing at the end of the radial expansion process.
25 Alternatively, or in addition, the outside diameter of the annular sealing member 2675 is selected to ensure sufficient interference fit with the inside diameter of the lower end of the existing casing to prevent axial displacement of the casing 2560 during the final stroke. Alternatively, or in addition, the outside diameter of the annular sealing member 2690 is selected to provide an interference fit with the inside walls of the 30 wellbore at an earlier point in the radial expansion process so as to prevent further axial displacement of the casing 2560. In this final alternative, the interference fit is
preferably selected to permit expansion of the casing 2560 by pulling the expansion cone 2555 out of the wellbore, without having to pressurize the pressure chamber 2660. During the radial expansion process, the pressurized areas of the apparatus 5 2500 are preferably limited to the fluid passages 2565, 2570, 2575, 2580, and 2S90, the pressure chambers 2605 within the slips 2525, and the pressure chamber 2660. No fluid pressure acts directly on the casing 2560. This permits the use of operating pressures higher than the casing 2560 could normally withstand.
Once the casing 2560 has been completely expanded off of the expansion cone 10 2555, the remaining portions of the apparatus 2500 are removed from the wellbore. In a preferred embodiment, the contact pressure between the deformed thin wall sections and compressible annular members of the lower end of the existing casing and the upper end 2665 of the casing 2560 ranges from about 400 to l 0,000 psi in order to optimally support the casing 2560 using the existing wellbore casing.
15 In this manner, the casing 2560 is radially expanded into contact with an existing section of casing by pressurizing the interior fluid passages 2565, 2570, 2575, 2580, and 2590, the pressure chambers of the slips 2605 and the pressure chamber 2660 of the apparatus 2500.
In a preferred embodiment, as required, the annular body of hardenable fluidic 20 material is then allowed to cure to form a rigid outer annular body about the expanded casing 2560. In the case where the casing 2560 is slotted, the cured fluidic material preferably permeates and envelops the expanded casing 2560. The resulting new section of wellbore casing includes the expanded casing 2560 and the rigid outer annular body. The overlapping joint between the pre-existing wellbore casing and the 25 expanded casing 2560 includes the deformed thin wall sections and the compressible outer annular bodies. The inner diameter of the resulting combined wellbore casings is substantially constant. In this manner, a mono-diameter wellbore casing is formed.
This process of expanding overlapping tubular members having thin wall end portions with compressible annular bodies into contact can be repeated for the entire length of a 30 wellbore. In this manner, a mono- diameter wellbore casing can be provided for thousands of feet in a subterranean formation.
- In a preferred embodiment, as the expansion cone 2555 nears the upper end 2665 of the casing 2560, the operating pressure of the second fluidic material is reduced in order to minimize shock to the apparatus 2500. In an alternative embodiment, the apparatus 2500 includes a shock absorber for absorbing the shock 5 created by the completion of the radial exparsion of the casing 2560.
In a preferred embodiment, the reduced operating pressure of the second fluidic material ranges from about 100 to 1,000 psi as the extrusion cone 2555 nears the end of the casing 2560 in order to optimally provide reduced axial movement and velocity of the expansion cone 2555. In a preferred embodiment, the operating pressure of the 10 second fluidic material is reduced during the return stroke of the apparatus 2500 to the range of about O to 500 psi in order minimize the resistance to the movement of the expansion cone 2555 during the return stroke. In a preferred embodiment, the stroke length of the apparatus 2500 ranges from about 10 to 45 feet in order to optimally provide equipments lengths that can be easily handled using typical oil well rigging 15 equipment and also minimize the frequency at which apparatus 2500 must be re stroked. In an alternative embodiment, at least a portion of the upper sealing head 2535 includes an expansion cone for radially expanding the casing 2560 during operation of the apparatus 2500 in order to increase the surface area of the casing 2560 acted upon 20 during the radial expansion process. In this manner, the operating pressures can be reduced. Alternatively, the apparatus 2500 may be used to join a first section of pipeline to an existing section of pipeline. Alternatively, the apparatus 2500 may be used to directly line the interior of a wellbore with a casing, without the use of an outer annular 25 layer of a hardenable material. Alternatively' the apparatus 2500 may be used to expand a tubular support member in a hole.
Referring now to Figures 19, 19a and 19b, another embodiment of an apparatus 2700 for expanding a tubular member will be described. The apparatus 2700 preferably includes a drillpipe 2705, an innerstring adapter 2710, a sealing sleeve 30 2715, a first inner sealing mandrel 2720, a first upper sealing head 2725, a first lower sealing head 2730, a first outer sealing mandrel 2735, a second inner sealing mandrel
C,1 C,
2740, a second upper sealing head 2745, a second lower sealing head 2750, a second outer sealing mandrel 2755, a load mandrel 2760, an expansion cone 276S, a mandrel launcher 2770, a mechanical slip body 2775, mechanical slips 2780, drag blocks 2785, casing 2790, and fluid passages 2795, 2800, 2805, 2810, 2815, 2820, 2825, and 2830.
5 The drillpipe 2705 is coupled to the innerstring adapter 2710. During operation of the apparatus 2700, the drillpipe 2705 supports the apparatus 2700. The drillpipe 2705 preferably comprises a substantially hollow tubular member or members. The drillpipe 2705 may be fabricated from any number of conventional commercially available materials such as, for example, oilfield country tubular goods, low alloy
10 steel, carbon steel, stainless steel, or other similar high strength materials In a preferred embodiment, the drillpipe 2705 is fabricated from coiled tubing in order to facilitate the placement ofthe apparatus 2700 in non-vertical wellbores. The drillpipe 2705 may be coupled to the innerstring adapter 2710 using any number of conventional commercially available mechanical couplings such as, for example, 15 drillpipe connection, oilfield country tubular goods specialty threaded connection, or a
standard threaded connection. In a preferred embodiment, the drillpipe 2705 is removably coupled to the innerstring adapter 2710 by a drillpipe connection in order to optimally provide high strength and easy disassembly.
The drillpipe 2705 preferably includes a fluid passage 2795 that is adapted to 2 0 convey fluidic materials from a surface location into the fluid passage 2800. In a preferred embodiment, the fluid passage 2795 is adapted to convey fluidic materials such as, for example, cement, epoxy' water, drilling mud or lubricants at operating pressures and flow rates ranging from about O to 9,000 psi and 0 to 3,000 gallons/minute. 2 5 The innerstring adapter 2710 is coupled to the drill string 2705 and the sealing sleeve 2715. The innerstring adapter 2710 preferably comprises a substantially hollow tubular member or members. The innerstring adapter 2710 may be fabricated from any number of conventional commercially available materials such as, for example, oilfield country tubular goods, low alloy steel, carbon steel, stainless steel or other
30 similar high strength materials. In a preferred embodiment, the innerstring adapter
lo c 2710 is fabricated from stainless steel in order to optimally provide high strength, corrosion resistance, and low friction surfaces.
The innerstring adapter 2710 may be coupled to the drill string 2705 using any number of conventional commercially available mechanical couplings such as, for 5 example, drillpipe connection, oilfield country tubular goods specialty threaded
connection, or a standard threaded connection. In a preferred embodiment, the innerstring adapter 2710 is removably coupled to the drill pipe 2705 by a standard threaded connection in order to optimally provide high strength and easy disassembly.
The innerstring adapter 2710 may be coupled to the sealing sleeve 2715 using any 1 0 number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfield country tubular goods specialty type threaded
connection, ratchet-latch type threaded connection or a standard threaded connection.
In a preferred embodiment, the innerstring adapter 2710 is removably coupled to the sealing sleeve 2715 by a standard threaded connection.
1 5 The innerstring adapter 2710 preferably includes a fluid passage 2800 that is adapted to convey fluidic materials from the fluid passage 2795 into the fluid passage 2805. In a preferred embodiment, the fluid passage 2800 is adapted to convey fluidic materials such as, for example, cement, epoxy, water, drilling mud or lubricants at operating pressures and flow rates ranging from about O to 9,000 psi and 0 to 3,000 20 gallons/minute.
The sealing sleeve 2715 is coupled to the innerstring adapter 2710 and the first inner sealing mandrel 2720. The sealing sleeve 2715 preferably comprises a substantially hollow tubular member or members. The sealing sleeve 2715 may be fabricated from any number of conventional commercially available materials such as, 25 for example, oilfeld country tubular goods, low alloy steel, carbon steel, stainless steel or other similar high strength materials. In a preferred embodiment, the sealing sleeve 2715 is fabricated from stainless steel in order to optimally provide high strength, corrosion resistance, and low friction surfaces.
The sealing sleeve 2715 may be coupled to the innerstring adapter 2710 using 30 any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfield country tubular goods specialty type threaded
c) connection, welding, amorphous bonding, or a standard threaded connection. In a preferred embodiment, the sealing sleeve 2715 is removably coupled to the innerstring adapter 2710 by a standard threaded connector. The sealing sleeve 2715 may be coupled to the first inner sealing mandrel 2720 using any number of conventional 5 commercially available mechanical couplings such as, for example, drillpipe connection, oilfeld country tubular goods specialty type threaded connection, welding, amorphous bonding or a standard threaded connection. In a preferred embodiment, the sealing sleeve 2715 is removably coupled to the inner sealing mandrel 2720 by a standard threaded connection.
1 0 The sealing sleeve 2715 preferably includes a fluid passage 2802 that is adapted to convey fluidic materials from the fluid passage 2800 into the fluid passage 2805. In a preferred embodiment, the fluid passage 2802 is adapted to convey fluidic materials such as; for example, cement, epoxy, waters drilling mud or lubricants at operating pressures and flow rates ranging from about O to 9,000 psi and 0 to 3,000 1 5 gallons/minute.
The first inner sealing mandrel 2720 is coupled to the sealing sleeve 2715 and the first lower sealing head 2730. The first inner sealing mandrel 2720 preferably comprises a substantially hollow tubular member or members. The first inner sealing mandrel 2720 may be fabricated from any number of conventional commercially 20 available materials such as, for example, oilfield country tubular goods, low alloy
steel, carbon steel, stainless steel or other similar high strength materials. In a preferred embodiment, the first inner sealing mandrel 2720 is fabricated from stainless steel in order to optimally provide high strength, corrosion resistance, and low friction surfaces. 25 The first inner sealing mandrel 2720 may be coupled to the sealing sleeve 2715 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection oilfield country tubular goods specialty threaded
connection, welding, amorphous bonding, or a standard threaded connection. In a preferred embodiment, the first inner sealing mandrel 2720 is removably coupled to 30 the sealing sleeve 2715 by a standard threaded connection. The first inner sealing mandrel 2720 may be coupled to the first lower sealing head 2730 using any number of
o conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfeld country tubular goods specialty type threaded connection, welding, amorphous bonding, or a standard threaded connection. In a preferred embodiment, the first inner sealing mandrel 2720 is removably coupled to the first 5 lower sealing head 2730 by a standard threaded connection.
The first inner sealing mandrel 2720 preferably includes a fluid passage 2805 that is adapted to convey fluidic materials from the fluid passage 2802 into the fluid passage 2810. In a preferred embodiment, the fluid passage 2805 is adapted to convey fluidic materials such as, for example, cement, epoxy, water, drilling mud or lubricants 10 at operating pressures and flow rates ranging from about 0 to 9,000 psi and 0 to 3,000 gallons/minute. The first upper sealing head 2725 is coupled to the first outer sealing mandrel 2735, the second upper sealing head 2745, the second outer sealing mandrel 2755, and the expansion cone 2765. The first upper sealing head 2725 is also movably coupled 15 to the outer surface of the first inner sealing mandrel 2720 and the inner surface of the casing 2790. In this manner, the first upper sealing head 2725 reciprocates in the axial direction. The radial clearance between the inner cylindrical surface of the first upper sealing head 2725 and the outer surface of the first inner sealing mandrel 2720 may range, for example, from about 0.0025 to 0.05 inches. In a preferred embodiment, the 2 0 radial clearance between the inner cylindrical surface of the first upper sealing head 2725 and the outer surface of the first inner sealing mandrel 2720 ranges from about 0.005 to 0.125 inches in order to optimally provide minimal radial clearance. The radial clearance between the outer cylindrical surface of the first upper sealing head 2725 and the inner surface of the casing 2790 may range, for example, from about 2 5 0.025 to 0.375 inches. In a preferred embodiment, the radial clearance between the outer cylindrical surface of the first upper sealing head 2725 and the inner surface of the casing 2790 ranges from about 0.025 to 0. l 25 inches in order to optimally provide stabilization for the expansion cone 2765 during the expansion process.
The first upper sealing head 2725 preferably comprises an annular member 30 having substantially cylindrical inner and outer surfaces. The first upper sealing head 2725 may be fabricated from any number of cons entional commercially available
materials such as, for example, oilfield country tubular goods, low alloy steel, carbon
steel, stainless steel or other similar high strength materials. In a preferred embodiment, the first upper sealing head 2725 is fabricated from stainless steed in order to optimally provide high strength, corrosion resistance and low friction surfaces.
5 The inner surface of the first upper sealing head 2725 preferably includes one or more annular sealing members 2835 for sealing the interface between the first upper sealing head 2725 and the first inner sealing mandrel 2720. The sealing members 2835 may comprise any number of conventional commercially available annular sealing members such as, for example, o-rings, polypak seals or metal spring energized seals.
10 in a preferred embodiment' the sealing members 2835 comprise polypak seals available from Parker Seals in order to optimally provide sealing for long axial strokes.
In a preferred embodiment, the first upper sealing head 2725 includes a shoulder 2840 for supporting the first upper sealing head 2725 on the first lower sealing head 2730.
15 The first upper sealing head 2725 may be coupled to the first outer sealing mandrel 2735 using any number of conventional commercially available mechanical couplings such as, for example, dri]lpipe connection, oilf eld country tubular goods specialty threaded connection, welding, amorphous bonding or a standard threaded connection. In a preferred embodiment, the first upper sealing head 2725 is removably 20 coupled to the first outer sealing mandrel 2735 by a standard threaded connection. In a preferred embodiment, the mechanical coupling between the first upper sealing head 2725 and the first outer sealing mandrel 2735 includes one or more sealing members 2845 for fluidicly sealing the interface between the first upper sealing head 2725 and the first outer sealing mandrel 2?3 A. The sealing members 2845 may comprise any 2 5 number of conventional commercially available sealing members such as, for example, o-rings, polypak seals or metal spring energized seals. In a preferred embodiment, the sealing members 2845 comprise polypak seals available from Parker Seals in order to optimally provide sealing for long axial strokes.
The first lower sealing head 2730 is coupled to the first inner sealing mandrel 3 0 2720 and the second inner sealing mandrel 2740. The first lower sealing head 2730 is also movably coupled to the inner surface ofthe first outer sealing mandrel 273. In 1 6
o this manner, the first upper sealing head 2725 and first outer sealing mandrel 2735 reciprocate in the axial direction. The radial clearance between the outer surface of the first lower sealing head 2730 and the inner surface of the first outer sealing mandrel 2735 may range, for example, from about 0.0025 to 0.05 inches. In a preferred 5 embodiment, the radial clearance between the outer surface of the first lower sealing head 2730 and the inner surface of the first outer sealing mandrel 2735 ranges from about 0.005 to O.Ol inches in order to optimally provide minimal radial clearance.
The first lower sealing head 2730 preferably comprises an annular member having substantially cylindrical inner and outer surfaces. The first lower sealing head 10 2730 may be fabricated from any number of conventional commercially available materials such as, for example, oilfield country tubular goods, low alloy steel, carbon
steel, stainless steel or other similar high strength materials. In a preferred embodiment, the first lower sealing head 2730 is fabricated from stainless steel in order to optimally provide high strength, corrosion resistance, and low friction 15 surfaces. The outer surface of the first lower sealing head 2730 preferably includes one or more annular sealing members 2850 for sealing the interface between the first lower sealing head 2730 and the first outer sealing mandrel 2735. The sealing members 2850 may comprise any number of conventional commercially available annular sealing members such as, for example, o-rings, polypak seals or metal spring 20 energized seals. In a preferred embodiment, the sealing members 2850 comprise polypak seals available from Parker Seals in order to optimally provide sealing for long axial strokes.
The first lower sealing head 2730 may be coupled to the first inner sealing mandrel 2720 using any number of conventional commercially available mechanical 2 5 couplings such as, for example, oilfield country tubular goods specialty threaded
connections, welding, amorphous bonding, or standard threaded connection. In a preferred embodiment, the first lower sealing head 2730 is removablycoupled to the first inner sealing mandrel 2720 by a standard threaded connection. In a preferred embodiment, the mechanical coupling between the first lower sealing head 2730 and 30 the first inner sealing mandrel 2720 includes one or more sealing members 2855 for fluidicly sealing the interface between the first lower sealing head 2730 and the first
o inner sealing mandrel 2720. The sealing members 2855 may comprise any number of conventional commercially available sealing members such as, for example, o-rings, polypak seals or metal spring energized seals. In a preferred embodiment, the sealing members 2855 comprise polypak seals available from Parker Seals in order to 5 optimally provide sealing for long axial strokes.
The first lower sealing head 2730 may be coupled to the second inner sealing mandrel 2740 using any number of conventional commercially available mechanical couplings such as, for example, oilfield country tubular goods specialty threaded
connection, welding, amorphous bonding, or a standard threaded connection. In a 1 0 preferred embodiment, the lower sealing head 2730 is removably coupled to the second inner sealing mandrel 2740 by a standard threaded connection. In a preferred embodiment, the mechanical coupling between the first lower sealing head 2730 and the second inner sealing mandrel 2740 includes one or more sealing members 2860 for fluidicly sealing the interface between the first lower sealing head 2730 and the second 15 inner sealing mandrel 2740. The sealing members 2860 may comprise any number of conventional commercially available sealing members such as, for example, o-rings, polypak seals or metal spring energized seals. In a preferred embodiment, the sealing members 2860 comprise polypak seals available from Parker Seals in order to optimally provide sealing for long axial strokes.
2 0 The first outer sealing mandrel 2735 is coupled to the first upper sealing head 2725, the second upper sealing head 2745, the second outer sealing mandrel 2755, and the expansion cone 2765. The first outer sealing mandrel 2735 is also movably coupled to the inner surface of the casing 2790 and the outer surface of the first lower sealing head 2730. In this manners the first upper scaling head 2725, first outer sealing 25 mandrel 2735, second upper sealing head 2745, second outer sealing mandrel 2755, and the expansion cone 2765 reciprocate in the axial direction. The radial clearance between the outer surface of the first outer sealing mandrel 2735 and the inner surface ofthe casing 2790 may range, for example, from about 0.025 to 0.375 inches. In a preferred embodiment, the radial clearance between the outer surface of the first outer 30 sealing mandrel 2735 and the inner surface of the casing 2790 ranges from about 0.025 to 0.125 inches in order to optimally provide stabilization for the expansion cone 2765
o C during the expansion process. The radial clearance between the inner surface of the first outer sealing mandrel 2735 and the outer surface of the first lower sealing head 2730 may range, for example, from about 0. 0025 to 0.05 inches. In a preferred embodiment, the radial clearance between the inner surface of the first outer sealing 5 mandrel 2735 and the outer surface of the first lower sealing head 2730 ranges from about 0.005 to O.Ol inches in order to optimally provide minimal radial clearance.
The outer sealing mandrel 1935 preferably comprises an annular member having substantially cylindrical inner and outer surfaces. T he first outer sealing mandrel 2735 may be fabricated from any number of conventional commercially 1 0 available materials such as, for example, oilfield country tubular goods, low alloy
steel, carbon steel, stainless steel or other similar high strength materials. In a preferred embodiment, the first outer sealing mandrel 2735 is fabricated from stainless steel in order to optimally provide high strength, corrosion resistance, and low friction surfaces. 15 The first outer sealing mandrel 2735 may be coupled to the first upper sealing head 2725 using any number of conventional commercially available mechanical couplings such as, for example, oilfield country tubular goods, welding, amorphous
bonding, or a standard threaded connection. In a preferred embodiment, the first outer sealing mandrel 2735 is removably coupled to the first upper sealing head 2725 by a 20 standard threaded connection. The first outer sealing mandrel 2735 may be coupled to the second upper sealing head 2745 using any number of conventional commercially available mechanical couplings such as, for example, oilfield country tubular goods
specialty threaded connection, welding, amorphous bonding, or a standard threaded connection. In a preferred embodiment, the first outer sealing mandrel 2735 is 25 removably coupled to the second upper sealing head 2745 by a standard threaded connection. The second inner sealing mandrel 2740 is coupled to the first lower sealing head 2730 and the second lower sealing head 2750. The second inner sealing mandrel 2740 preferably comprises a substantially hollow tubular member or members. The 30 second inner sealing mandrel 2740 may be fabricated from any number of conventional commercially available materials such as, for example, oil field country
o tubular goods, low alloy steel, carbon steel, stainless steel or other similar high strength materials. In a preferred embodiment, the second inner sealing mandrel 2740 is fabricated from stainless steel in order to optimally provide high strength, corrosion resistance, and low friction surfaces.; 5 The second inner sealing mandrel 2740 may be coupled to the first lower sealing head 2730 using any number of conventional commercially available mechanical couplings such as, for example, oilfield country tubular goods specialty
threaded connection, welding, amorphous bonding, or a standard threaded connection.
In a preferred embodiment, the second inner sealing mandrel 2740 is removably 10 coupled to the first lower sealing head 2740 by a standard threaded connection. The mechanical coupling between the second inner sealing mandrel 2740 and the first lower sealing head 2730 preferably includes sealing members 2860.
The second inner sealing mandrel 2740 may be coupled to the second lower sealing head 2750 using any number of conventional commercially available 15 mechanical couplings such as, for example, oilfield country tubular goods specialty
threaded connection, welding, amorphous bonding, or a standard threaded connection.
In a preferred embodiment, the second inner sealing mandrel 2720 is removably coupled to the second lower sealing head 2750 by a standard threaded connection. In a preferred embodiment, the mechanical coupling between the second inner scaling 20 mandrel 2740 and the second lower sealing head 2750 includes one or more sealing members 2865. The sealing members 2865 may comprise any number of conventional commercially available seals such as, for example, o-rings, polypalc seals or metal spring energized seals. In a preferred embodiment, the sealing members 2865 comprise polypak seals available from Parker Seals.
25 The second inner sealing mandrel 2740 preferably includes a fluid passage 2810 blat is adapted to convey lluidic materials from the fluid passage 2805 into the fluid passage 2815. In a preferred embodiment, the fluid passage 2810 is adapted to convey fluidic materials such as, for example, cement, epoxy, water, drilling mud or lubricants at operating pressures and pow rates ranging from about O to 9,000 psi and 0 30 to 3, 000 gallons/minute.
c) The second upper sealing head 2745 is coupled to the first upper sealing head 2725, the first outer sealing mandrel 2735, the second outer sealing mandrel 2755, and the expansion cone 2765. The second upper sealing head 2745 is also movably coupled to the outer surface of the second inner sealing mandrel 2740 and the inner 5 surface of the casing 2790. In this manner, the second upper sealing head 2745 reciprocates in the axial direction. The radial clearance between the inner cylindrical surface of the second upper sealing head 2745 and the outer surface of the second inner sealing mandrel 2740 may range, for example, from about 0.0025 to 0.05 inches. In a preferred embodiment, the radial clearance between the inner cylindrical surface of the 10 second upper sealing head 2745 and the outer surface of the second inner sealing mandrel 2740 ranges from about O.OOS to 0.01 inches in order to optimally provide minimal radial clearance. The radial clearance between the outer cylindrical surface of the second upper sealing head 2745 and the inner surface of the casing 2790 may range, for example, from about 0.025 to. 375 inches. In a preferred embodiment, the 15 radial clearance between the outer cylindrical surface of the second upper sealing head 2745 and the inner surface ofthe casing 2790 ranges from about 0.025 to 0.125 inches in order to optimally provide stabilization for the expansion cone 2765 during the expansion process.
The second upper sealing head 2745 preferably comprises an annular member 20 having substantially cylindrical inner and outer surfaces. The second upper sealing head 2745 may be fabricated from any number of conventional commercially available materials such as, for example, oilfield country tubular goods, low alloy steel, carbon
steel, stainless steel or other similar high strength materials. In a preferred embodiment, the second upper sealing head 2745 is fabricated from stainless steel in 25 order to optimally provide high strength, corrosion resistance, and low friction surfaces. The inner surface of the second upper sealing head 2745 preferably includes one or more annular sealing members 2870 for sealing the interface between the second upper sealing head 2745 and the second inner sealing mandrel 2740. The sealing members 2870 may comprise any number of conventional commercially 30 available annular sealing members such as, for example, o-rings, polypak seals, or metal spring energized seals. In a preferred embodiment, the sealing members 2870
o comprise polypak seals available from Parker Seals in order to optimally provide sealing for long axial strokes.
In a preferred embodiment, the second upper sealing head 2745 includes a shoulder 2875 for supporting the second upper sealing head 2745 on the second louver 5 sealing head 2750.
The second upper sealing head 2745 may be coupled to the first outer sealing mandrel 2735 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfield country tubular goods
specialty threaded connection, ratchet-latch type threaded connection, or a standard 10 threaded connection. In a preferred embodiment, the second upper sealing head 2745 is removably coupled to the first outer sealing mandrel 2735 by a standard threaded connection. In a preferred embodiment, the mechanical coupling between the second upper sealing head 2745 and the first outer sealing mandrel 2735 includes one or more sealing members 2880 for fluidicly sealing the interface between the second upper 15 sealing head 2745 and the first outer sealing mandrel 2735. The sealing members 2880 may comprise any number of conventional commercially available sealing members such as, for example, o-rings, polypak seals or metal spring energized seals. In a preferred embodiment, the sealing members 2880 comprise polypak seals available from Parker Seals in order to optimally provide sealing for a long axial stroke.
2 0 The second upper sealing head 2745 may be coupled to the second outer sealing mandrel 2755 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfield country tubular goods
specialty type threaded connection, or a standard threaded connection. In a preferred embodiment, the second upper sealing head 2745 is removably coupled to the second 2 5 outer sealing mandrel 2755 by a standard threaded connection. In a preferred embodiment, the mechanical coupling between the second upper sealing head 2745 and the second outer sealing mandrel 2755 includes one or more sealing members 2885 for fluidicly sealing the interface between the second upper sealing head 2745 and the second outer sealing mandrel 2755. The sealing members 2885 may comprise 3 0 any number of conventional commercially available sealing members such as, for example, o-rings. polypak seals or metal spring energized seals. In a preferred
o embodiment, the sealing members 2885 comprise polypak seals available from Parker Seals in order to optimally provide sealing for long axial strokes.
The second lower sealing head 2750 is coupled to the second inner sealing mandrel 2740 and the load mandrel 2760. The second lower sealing head 2750 is also 5 movably coupled to the inner surface of the second outer sealing mandrel 2755. In this manner, the first upper sealing head 2725, the first outer sealing mandrel 2735, second upper sealing head 2745, second outer sealing mandrel 2755, and the expansion cone 2765 reciprocate in the axial direction. The radial clearance between the outer surface of the second lower sealing head 27SO and the inner surface of the second outer sealing 10 mandrel 2755 may range, for example, from about 0.0025 to 0.05 inches. In a preferred embodiment, the radial clearance between the outer surface of the second lower sealing head 2750 and the inner surface of the second outer sealing mandrel 2755 ranges from about 0.005 to O.Ol inches in order to optimally provide minimal radial clearance.
15 The second lower sealing head 2750 preferably comprises an annular member having substantially cylindrical inner and outer surfaces. The second lower sealing head 2750 may be fabricated from any number of conventional commercially available materials such as, for example, oilfeld country tubular goods, low alloy steel, carbon steel, stainless steel or other similar high strength materials. In a preferred 2 0 embodiment, the second lower sealing head 2750 is fabricated from stainless steel in order to optimally provide high strength, corrosion resistance, and low friction surfaces. The outer surface of the second lower sealing head 2750 preferably includes one or more annular sealing members 2890 for sealing the interface between the second lower sealing head 2750 and the second outer sealing mandrel 2755. The 2 5 sealing members 2890 may comprise any number of conventional commercially available annular sealing members such as, for example, o-rings, polypak seals or metal spring energized seals. In a preferred embodiment, the sealing members 2890 comprise polypak seals available from Parker Seals in order to optimally provide sealing for long axial strokes.
30 The second lower sealing head 2750 may be coupled to the second inner sealing mandrel 2740 using any number of conventional commercially available mechanical
to f'-
couplings such as, for example, drillpipe connection, oilfeld country tubular goods specialty threaded connection, ratchet-latch type threaded connection, or a standard threaded connection. In a preferred embodiment, the second lower sealing head 2750 is removably coupled to the second irmer sealing mandrel 2740 by a standard threaded 5 connection. In a preferred embodiment, the mechanical coupling between the second lower sealing head 2750 and the second inner sealing mandrel 2740 includes one or snore sealing members 2895 for fluidicly sealing the interface between the second sealing head 2750 and the second sealing mandrel 2740. The sealing members 2895 may comprise any number of conventional commercially available sealing members 10 such as, for example, o-rings, polypak seals or metal spring energized seals. In a preferred embodiment, the sealing members 2895 comprise polypak seals available from Parker Seals in order to optimally provide sealing for a long axial stroke.
The second lower sealing head 2750 may be coupled to the load mandrel 2760 using any number of conventional commercially available mechanical couplings such 15 as, for example, drillpipe connection, oilfeld tubular goods specialty threaded connection, ratchet-latch type threaded connection, or a standard threaded connection.
In a preferred embodiment, the second lower sealing head 2750 is removably coupled to the load mandrel 2760 by a standard threaded cormection. In a preferred embodiment, the mechanical coupling between the second lower sealing head 2750 20 and the load mandrel 2760 includes one or more sealing members 2900 for fluidicly sealing the interface between the second lower sealing head 2750 and the load mandrel 2760. The sealing members 2900 may comprise any number of conventional commercially available sealing members such as, for example, o-rings, polypak seals or metal spring energized seals. In a preferred embodiment, the sealing members 2900 2 5 comprise polypak seals available from Parker Seals in order to optimally provide sealing for long axial strokes.
In a preferred embodiment, the second lower sealing head 2750 includes a throat passage 2905 fluidicly coupled between the fluid passages 2810 and 2815. The throat passage 2905 is preferably of reduced size and is adapted to receive and engage 30 with a plug 2910' or other similar device. In this manner, the fluid passage 2810 is iluidicly isolated from the fluid passage 2815. In this manner, the pressure chambers
2915 and 2920 are pressurized. The use of a plurality of pressure chambers in the apparatus 2700 permits the effective driving force to be multiplied. While illustrated using a pair of pressure chambers, 2915 and 2920, the apparatus 2700 may be further modified to employ additional pressure chambers.
5 The second outer sealing mandrel 2755 is coupled to the first upper sealing head 2725, the first outer sealing mandrel 2735, the second upper sealing head 2745, and the expansion cone 2765. The second outer sealing mandrel 2755 is also movably coupled to the inner surface of the casing 2790 and the outer surface of the second lower sealing head 2750. In this manner, the first upper sealing head 2725, first outer 10 sealing mandrel 2735, second upper sealing head 2745, second outer sealing mandrel 2755, and the expansion cone 2765 reciprocate in the axial direction.
The radial clearance between the outer surface of the second outer sealing mandrel 2755 and the inner surface ofthe casing 2790 may range, for example, from about 0.025 to 0.375 inches. In a preferred embodiment, the radial clearance between 15 the outer surface of the second outer sealing mandrel 2755 and the inner surface of the casing 2790 ranges from about 0.025 to 0.125 inches in order to optimally provide stabilization for the expansion cone 2765 during the expansion process. The radial clearance between the inner surface of the second outer sealing mandrel 2755 and the outer surface of the second lower sealing head 2750 may range, for example, from 2 0 about 0.0025 to 0.05 inches. In a preferred embodiment, the radial clearance between the inner surface of the second outer sealing mandrel 2755 and the outer surface of the second lower sealing head 2750 ranges from about 0.005 to 0.01 inches in order to optimally provide minimal radial clearance.
The second outer sealing mandrel 2755 preferably comprises an annular 2 5 member having substantially cylindrical inner and outer surfaces. The second outer sealing mandrel 2755 may be fabricated from any number of conventional commercially available materials such as, for example, oilfield country tubular goods,
low alloy steel, carbon steel, stainless steel or other similar high strength materials. In a preferred embodiment, the second outer sealing mandrel 2755 is fabricated from 3 0 stainless steel in order to optimally provide high strength, corrosion resistance, and low friction surfaces.
O a, The second outer sealing mandrel 2755 may be coupled to the second upper sealing head 2745 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfield country
tubular goods specialty threaded connection, ratchet-latch type threaded connection or 5 a standard threaded connection. In a preferred embodiment, the second outer sealing mandrel 2755 is removably coupled to the second upper sealing head 2745 by a standard threaded connection. The second outer sealing mandrel 2755 may be coupled to the expansion cone 2765 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfeld country 10 tubular goods specialty type threaded connection, ratchet-latch type threaded connection, or a standard threaded connection. In a preferred embodiment, the second outer sealing mandrel 2755 is removably coupled to the expansion cone 2765 by a standard threaded connection.
The load mandrel 2760 is coupled to the second lower sealing head 2750 and 15 the mechanical slip body 2755. The load mandrel 2760 preferably comprises an annular member having substantially cylindrical inner and outer surfaces. The load mandrel 2760 may be fabricated from any number of conventional commercially available materials such as, for example? oilIield country tubular goods, low alloy steel, carbon steel, stainless steel or other similar high strength materials. In a 20 preferred embodiment, the load mandrel 2760 is fabricated from stainless steel in order to optimally provide high strength, corrosion resistance, and low friction surfaces.
T he load mandrel 2760 may be coupled to the second lower sealing head 2750 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection,, oilfelu country tubular goods specialty type 25 threaded connection, ratchet-latch type threaded connection, or a standard threaded connection. In a preferred embodiment, the load mandrel 2760 is removably coupled to the second lower sealing head 2750 by a standard threaded cormection. The load mandrel 2760 may be coupled to the mechanical slip body 2775 using any number of conventional commercially available mechanical couplings such as, for example, 30 dril]pipe connection, oilfield country tubular goods specialty type threaded connection,
ratchet-latch type threaded connection or a standard threaded connection. In a 17q
o CS preferred embodiment, the load mandrel 2760 is removably coupled to the mechanical slip body 2775 by a standard threaded connection.
The load mandrel 2760 preferably includes a fluid passage 2815 that is adapted to convey fluidic materials from the fluid passage 2810 to the fluid passage 2820. In a 5 preferred embodiment, the fluid passage 2815 is adapted to convey fluidic materials such as, for example, cement, epoxy, water, drilling mud or lubricants at operating pressures and flow rates ranging from about O to 9,000 psi and 0 to 3,000 gal lons/minute.
The expansion cone 2765 is coupled to the second outer sealing mandrel 2755.
10 The expansion cone 2765 is also movably coupled to the inner surface of the casing 2790. In this manner, the first upper sealing head 2725, first outer sealing mandrel 2735, second upper sealing head 2745, second outer sealing mandrel 2755, and the expansion cone 2765 reciprocate in the axial direction. The reciprocation of the expansion cone 2765 causes the casing 2790 to expand in the radial direction.
15 The expansion cone 2765 preferably comprises an annular member having substantially cylindrical ironer and conical outer surfaces. The outside radius of the outside conical surface may range, for example, from about 2 to 34 inches. In a preferred embodiment, the outside radius of the outside conical surface ranges from about 3 to 28 inches in order to optimally provide expansion cone dimensions that 20 accommodate the typical range of casings. The axial length of the expansion cone 2765 may range, for example, from about 2 to times the largest outer diameter of the expansion cone 2765. In a preferred embodiment, the axial length of the expansion cone 2765 ranges from about 3 to S times the largest outer diameter of the expansion cone 2765 in order to optimally provide stabilization and centralization of the 2 5 expansion cone 2765. In a preferred embodiment, the angle of attack of the expansion cone 2765 ranges from about 5 to 30 degrees in order to optimally balance frictional forces and radial expansion forces.
The expansion cone 2765 may be fabricated from any number of conventional commercially available materials such as, for example, machine tool steel, nitride steel, 30 titanium, tungsten carbide, ceramics or other similar high strength materials. In a preferred embodiment, the expansion cone 2765 is fabricated from D2 machine tool
Osteel in order to optimally provide high strength and resistance to corrosion and galling. In a particularly preferred embodiment, the outside surface of the expansion cone 2765 has a surface hardness ranging from about 58 to 62 Rockwell C in order to optimally provide high strength and resistance to wear and galling.
5 The expansion cone 2765 may be coupled to the second outside sealing mandrel 2765 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfeld country tubular goods specialty type threaded connection, ratchet-latch type threaded connection or a standard threaded connection. In a preferred embodiment, the expansion cone 2765 is 1 0 coupled to the second outside sealing mandrel 2765 using a standard threaded connection in order to optimally provide high strength and easy replacement of the expansion cone 2765.
The mandrel launcher 2770 is coupled to the casing 2790. The mandrel launcher 2770 comprises a tubular section of casing having a reduced wall thickness 1 5 compared to the casing 2790. In a preferred embodiment, the wall thickness of the mandrel launcher 2770 is about 50 to l DO % of the wall thickness of the casing 2790.
T he wall thickness of the mandrel launcher 2770 may range, for example, from about 0. l S to l.5 inches. In a preferred embodiment, the wall thickness of the mandrel launcher 2770 ranges from about 0.25 to 0.75 inches. In this manner, the initiation of 2 0 the radial expansion of the casing 2790 is facilitated, the placement of the apparatus 2700 within a wellbore casing and wellbore is facilitated, and the mandrel launcher 2770 has a burst strength approximately equal to that of the casing 2790.
l he mandrel launcher 2770 may be coupled to the casing 2790 using any number of conventional nn.echanical couplings such as, for example, a standard 2 5 threaded connection. The mandrel launcher 2770 may be fabricated from any number of conventional commercially available materials such as, for example, oil field country
tubular goods, low alloy steel, carbon steel, stainless steel, or other similar high strength materials. In a preferred embodiment, the mandrel launcher 2770 is fabricated from oily eld country tubular goods of higher strength than that of the casing 2790 but 3 0 with a reduced wall thickness in order to optimally provide a small compact tubular container having a burst strength approximately equal to that of the casing 2790.
o The mechanical slip body 2775 is coupled to the load mandrel 2760, the mechanical slips 2780, and the drag blocks 2785. The mechanical slip body 2775 preferably comprises a tubular member having an inner passage 2820 fluidicly coupled to the passage 2815. In this manner, fluidic materials may be conveyed from the 5 passage 2820 to a region outside of the apparatus 2700.
The mechanical slip body 2775 may be coupled to the load mandrel 2760 using any number of conventional mechanical couplings. In a preferred embodiment, the mechanical slip body 2775 is removably coupled to the load mandrel 2760 using a standard threaded connection in order to optimally provide high strength and easy 10 disassembly. The mechanical slip body 2775 may be coupled to the mechanical slips 2780 using any number of conventional mechanical couplings. In a preferred embodiment, themechanical slip body 2755 is removably coupled to the mechanical slips 2780 using threaded connections and sliding steel retainer rings in order to optimally provide a high strength attachment. The mechanical slip body 2755 may be 15 coupled to the drag blocks 2785 using any number of conventional mechanical couplings. In a preferred embodiment, the mechanical slip body 2775 is removably coupled to the drag blocks 2785 using threaded connections and sliding steel retainer rings in order to optimally provide a high strength attachment.
The mechanical slip body 2775 preferably includes a fluid passage 2820 that is 20 adapted to convey fluidic materials from the fluid passage 2815 to the region outside of the apparatus 2700. In a preferred embodiment, the fluid passage 2820 is adapted to convey fluidic materials such as, for example, cement, epoxy, water, drilling mud or lubricants at operating pressures and flow rates ranging from about O to 9,000 psi and 0 to 3,000 gallons/minute.
25 The mechanical slips 2780 are coupled to the outside surface of the mechanical slip body 2775. During operation of the apparatus 2700, the mechanical slips 2780 prevent upward movement of the casing 2790 and mandrel launcher 2770. In this manner, during the axial reciprocation of the expansion cone 2765, the casing 2790 and mandrel launcher 2770 are maintained in a substantially stationary position. In 30 this manner, the mandrel launcher 2765 and casing 2790 and mandrel launcher 2770
G are expanded in the radial direction by the axial movement of the expansion cone 2765. The mechanical slips 2780 may comprise any number of conventional commercially available mechanical slips such as, for example, RTTS packer tungsten 5 carbide mechanical slips, RTTS packer wicker type mechanical slips or Model 3L retrievable bridge plug tungsten carbide upper mechanical slips. In a preferred embodiment, the mechanical slips 2780 comprise RTTS packer tungsten carbide mechanical slips available from Halliburton Energy Services in order to optimally provide resistance to axial movement of the casing 2790 and mandrel launcher 2770 10 during the expansion process.
The drag blocks 2785 are coupled to the outside surface of the mechanical slip body 2775. During operation ofthe apparatus 2700, the drag blocks 2785 prevent upward movement ofthe casing 2790 and mandrel launcher 2770. In this manner, during the axial reciprocation of the expansion cone 2765, the casing 2790 and 15 mandrel launcher 2770 are maintained in a substantially stationary position. In this manner, the mandrel launcher 2770 and casing 2790 are expanded in the radial direction by the axial movement of the expansion cone 27G5.
The drag blocks 2785 may comprise any number of conventional commercially available mechanical slips such as, for example, RTTS packer mechanical drag blocks 2 0 or Model 3L retrievable bridge plug drag blocks. In a preferred embodiment, the drag blocks 2785 comprise RTTS packer mechanical drag blocks available from Halliburton Energy Services in order to optimally provide resistance to axial movement of the casing 2790 and mandrel launcher 2770 during the expansion process. 25 The casing 2790 is coupled to the mandrel launcher 2770. The casing 2790 is further removably coupled to the mechanical slips 2780 and drag blocks 2785. The casing 2790 preferably comprises a tubular member. The casing 2790 may be fabricated from any number of conventional commercially available materials such as' for example, slotted tubulars, oilfeld country tubular goods, low alloy steel, carbon 30 steel, stainless steel or other similar high strength materials. In a preferred embodiment, the casing 2790 is fabricated from oilfeld country tubular goods
o available from various foreign and domestic steel mills in order to optimally provide high strength using standardized materials. In a preferred embodiment, the upper end of the casing 2790 includes one or more sealing members positioned about the exterior of the casing 2790.
5 During operation, the apparatus 2700 is positioned in a wellbore with the upper end of the casing 2790 positioned in an overlapping relationship within an existing wellbore casing. In order minimize surge pressures within the borehole during placement of the apparatus 2700, the fluid passage 2795 is preferably provided with one or more pressure relief passages. During the placement of the apparatus 2700 in 10 the wellbore, the casing 2790 is supported by the expansion cone 2765.
After positioning of the apparatus 2700 within the bore hole in an overlapping relationship with an existing section of wellbore casing, a first fluidic material is pumped into the fluid passage 2795 from a surface location. The first fluidic material is conveyed from the fluid passage 2795 to the fluid passages 2800, 2802, 2805, 2810, 15 2815, and 2820. The first fluidic material will then exit the apparatus 2700 and fill the annular region between the outside of the apparatus 2700 and the interior walls of the bore hole.
The first fluidic material may comprise any number of conventional commercially available materials such as, for example, epoxy, drilling mud, slag mix, 2 0 water or cement. In a preferred embodiment, the first fluidic material comprises a hardenable fluidic sealing material such as, for example, slag mix, epoxy, or cement.
In this manner, a wellbore casing having an outer annular layer of a hardenable material may be formed.
The first fluidic material may be pumped into the apparatus 2700 at operating 25 pressures and flow rates ranging, for example, from about 0 to 4,500 psi and 0 to 3,000 gallons/minute. In a preferred embodiment, the first fluidic material is pumped into the apparatus 2700 at operating pressures and flow rates ranging from about 0 to 3,500 psi and O to 1,200 gallons/minute in order to optimally provide operational efficiency.
At a predetermined point in the injection of the first fluidic material such as, for 30 example, after the annular region outside of the apparatus 2700 has been filled to a predetermined level, a plug 2910, dart, or other similar device is introduced into the 1]9
G first fluidic material. The plug 2910 lodges in the throat passage 2905 thereby fluidicly isolating the fluid passage 2810 from the fluid passage 2815.
After placement of the plug 2910 in the throat passage 2905, a second fluidic material is pumped into the fluid passage 2795 in order to pressurize the pressure 5 chambers 2915 and 2920. The second fluidic material may comprise any number of conventional commercially available materials such as, for example, water' drilling gases, drilling mud or lubricants. In a preferred embodiment, the second fluidic material comprises a non-hardenable fluidic material such as, for example, water, drilling mud or lubricant. The use of lubricant optimally provides lubrication of the 10 moving parts of the apparatus 2700.
The second fluidic material may be pumped into the apparatus 2700 at operating pressures and flow rates ranging, for example, from about 0 to 4,500 psi and 0 to 4,500 gallons/minute. In a preferred embodiment, the second fluidic material is pumped into the apparatus 2700 at operating pressures and flow rates ranging from 15 about 0 to 3,500 psi and 0 to 1, 200 gallons/minute in order to optimally provide operational efficiency.
The pressurization of the pressure chambers 2915 and 2920 cause the upper sealing heads, 2725 and 2745, outer sealing mandrels, 2735 and 2755, and expansion cone 2765 to move in an axia] direction. As the expansion cone 2765 moves in the 20 axial direction, the expansion cone 2765 pulls the mandrel launcher 2770, casing 2790, and drag blocks 2785 along, which sets the mechanical slips 2780 and stops further axial movement of the mandrel launcher 2770 and casing 2790. In this manner, the axial movement of the expansion cone 2765 radially expands the mandrel launcher 2770 and casing 2790 25 Once the upper sealing heads, 2725 and 2745, outer sealing mandrels, 2735 and 2755, and expansion cone 2765 complete an axial stroke, the operating pressure of the second fluidic material is reduced and the drill string 2705 is raised. This causes the inner sealing mandrels, 2720 and 2740, lower sealing heads, 2730 and 2750, load mandrel 2760, and mechanical slip body 2755 to move upward. This unsets the 30 mechanical slips 2780 and permits the mechanical slips 2780 and drag blocks 2785 to be moved upward within the mandrel launcher 2770 and casing 2790. When the lower
sealing heads, 2730 and 2750, contact the upper sealing heads, 2725 and 2745, the second fluidic material is again pressurized and the radial expansion process continues.
In this manner, the mandrel launcher 2770 and casing 2790 are radially expanded through repeated axial strokes of the upper sealing heads, 2725 and 2745, outer sealing 5 mandrels, 2735 and 2755, and expansion cone 2765. Throughout the radial expansion process, the upper end of the casing 2790 is preferably maintained in an overlapping relation with an existing section of wellbore casing.
At the end of the radial expansion process, the upper end of the casing 2790 is expanded into intimate contact with the inside surface of the lower end of the existing 10 wellbore casing. In a preferred embodiment, the sealing members provided at the upper end of the casing 2790 provide a fluidic seal between the outside surface of the upper end of the casing 2790 and the inside surface of the lower end of the existing wellbore casing. In a preferred embodiment, the contact pressure between the casing 2790 and the existing section of wellbore casing ranges from about 400 to lO,OOO in 15 order to optimally provide contact pressure for activating the sealing members, provide optimal resistance to axial movement of the expanded casing, and optimally resist typical tensile and compressive loads on the expanded casing.
In a preferred embodiment, as the expansion cone 2765 nears the end of the casing 2790, the operating pressure of the second fluidic material is reduced in order to 20 minimize shock to the apparatus 2700. In an alternative embodiment, the apparatus 2700 includes a shock absorber for absorbing the shock created by the completion of the radial expansion ofthe casing 2790.
In a preferred embodiment, the reduced operating pressure of the second fluidic material ranges from about lOO to l,OOO psi as the expansion cone 2765 nears the end 25 of the casing 2790 in order to optimally provide reduced axial movement and velocity of the expansion cone 2765. In a preferred embodiment, the operating pressure of the second fluidic material is reduced during the return stroke of the apparatus 2700 to the range of about O to 500 psi in order minimize the resistance to the movement of the expansion cone 2765 during the return stroke. In a preferred embodiment, the stroke 30 length of the apparatus 2700 ranges from about 10 to 45 feet in order to optimally provide equipment that can be easily handled by to pical oil ell rigging equipment and
o minimize the frequency at which the apparatus 2700 must be re-stroked during an expansion operation.
In an alternative embodiment, at least a portion of the upper sealing heads, 2725 and 2745, include expansion cones for radially expanding the mandrel launcher 2770 5 and casing 2790 during operation of the apparatus 2700 in order to increase the surface area of the casing 2790 acted upon during the radial expansion process In this manner, the operating pressures can be reduced.
In an alternative embodiment, mechanical slips are positioned in an axial location between the sealing sleeve 1915 and the first inner sealing mandrel 2720 in 10 order to optimally provide a simplified assembly and operation of the apparatus 2700.
Upon the complete radial expansion of the casing 2790, if applicable, the first fluidic material is permitted to cure within the annular region between the outside of the expanded casing 2790 and the interior walls of the wellbore. In the case where the casing 2790 is slotted, the cured Iluidic material preferably permeates and envelops the 1 5 expanded casing 2790. In this manner, a new section of wellbore casing is formed within a wellbore. Alternatively, the apparatus 2700 may be used to join a first section of pipeline to an existing section of pipeline. Alternatively, the apparatus 2700 may be used to directly line the interior of a wellbore with a casing, without the use of an outer annular layer of a hardenable material. Alternatively, the apparatus 2700 may be used 2 0 to expand a tubular support member in a hole.
Inuring the radial expansion process, the pressurized areas of the apparatus 2700 are limited to the fluid passages 2795, 2800, 2802, 2805, and 2810, and the pressure chambers 2915 and 2920. No fluid pressure acts directly on the mandrel launcher 2770 and casing 2790. This permits the use ot operating pressures higher 2 5 than the mandrel launcher 2770 and casing 2790 could normally withstand.
Referring now to Figure 20, a preferred embodiment of an apparatus 3000 for forming a mono-diameter wellbore casing will be described. The apparatus 3000 preferably includes a drillpipe 3005, an innerstring adapter 3010, a sealing sleeve 3015, a first inner sealing mandrel 3020, hydraulic slips 3025, a first upper sealing 30 head 3030, a first lower sealing head 3035, a first outer sealing mandrel 3040, a second inner sealing mandrel 3045, a second upper sealing head 3050, a second her sealing
o f head 3055, a second outer sealing mandrel 3060, load mandrel 3065, expansion cone 3070, casing 3075, and fluid passages 3080, 3085, 3090, 3095, 3100, 3105, 3110, 3115 and 3 120.
The drillpipe 3005 is coupled to the innerstring adapter 3010. During operation 5 of the apparatus 3000, the drillpipe 3005 supports the apparatus 3000. The drillpipe 3005 preferably comprises a substantially hollow tubular member or members. The drillpipe 3005 may be fabricated from any number of conventional commercially available materials such as, for example, oilfield country tubular goods, low alloy
steel, carbon steel, stainless steel or other similar high strength materials. In a 10 preferred embodiment, the drillpipe 3005 is fabricated from coiled tubing in order to facilitate the placement of the apparatus 3000 in non-vertical wellbores. The drillpipe 3005 may be coupled to the innerstring adapter 3010 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfield country tubular goods specialty threaded connection, or a
15 standard threaded connection. In a preferred embodiment, the drillpipe 3005 is removably coupled to the innerstring adapter 3010 by a drillpipe connection.
The drillpipe 3005 preferably includes a fluid passage 3080 that is adapted to convey fluidic materials from a surface location into the fluid passage 3085. In a preferred embodiment, the fluid passage 3080 is adapted to convey fluidic materials 2 0 such as, for example, cement, epoxy, water, drilling mud or lubricants at operating pressures and flow rates ranging from about O to 9,000 psi and 0 to 3,000 gallons/minute. The innerstring adapter 3010 is coupled to the drill string 3005 and the sealing sleeve 3015. The innerstring adapter 3010 preferably comprises a substantially hollow 25 tubular member or members. T he innerstring adapter 3010 may be fabricated from any number of conventional commercially available materials such as, for example, oilfield country tubular goods, low alloy steel, carbon steel, stainless steel, or other
similar high strength materials. In a preferred embodiment, the innerstring adapter 3010 is fabricated from stainless steel in order to optimally provide high strength, 30 corrosion resistance, and low friction surfaces.
or The innerstring adapter 3010 may be coupled to the drill string 3005 using any number of conventional commercially available mechanical couplings such as, for example. drillpipe connection, oilfield country tubular goods specialty type threaded
connection, or a standard threaded connection. In a preferred embodiment, the 5 innerstring adapter 3010 is removably coupled to the drill pipe 3005 by a drillpipe connection. [he innerstring adapter 3010 may be coupled to the sealing sleeve 3015 using any number of conventional commercially assailable mechanical couplings such as, for example, drillpipe connection, oilfeld country tubular goods specialty type threaded connection, ratchet-latch type threaded connection or a standard threaded 10 connection. In a preferred embodiment, the innerstring adapter 3010 is removably coupled to the sealing sleeve 3015 by a standard threaded connection.
The innerstring adapter 3010 preferably includes a fluid passage 30BS that is adapted to convey fluidic materials from the fluid passage 3080 into the fluid passage 3090. In a preferred embodiment, the fluid passage 3085 is adapted to convey fluidic 15 materials such as, for example, cement, epoxy, water, drilling mud, or lubricants at operating pressures and flow rates ranging from about O to 9,000 psi and 0 to 3,000 gallons/minute. The sealing sleeve 3015 is coupled to the innerstring adapter 3010 and the first inner sealing mandrel 3020. The sealing sleeve 3015 preferably comprises a 2 0 substantially hollow tubular member or members. The sealing sleeve 3015 may be fabricated from any number of conventional commercially available materials such as, for example, oilfield country tubular goods, low alloy steel, carbon steel, stainless steel
or other similar high strength materials. In a preferred embodiment, the sealing sleeve 30!5 is fabricated from stainless steel ire order to optimally provide high strength, 2 5 corrosion resistance, and low friction surfaces.
The sealing sleeve 3015 may be coupled to the innerstring adapter 3010 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfield country tubular goods specialty type threaded
connection, ratchet-latch tripe connection or a standard threaded connection. In a 30 preferred embodiment, the sealing sleeve 3015 is removably coupled to the innerstring adapter 3010 by a standard threaded connection. The sealing sleeve 015 may be
- coupled to the first inner sealing mandrel 3020 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfield country tubular goods specialty type threaded connection, ratchet-
latch type threaded connection or a standard threaded connection. In a preferred 5 embodiment, the sealing sleeve 3015 is removably coupled to the first inner sealing mandrel 3020 by a standard threaded connection.
The sealing sleeve 3015 preferably includes a fluid passage 3090 that is adapted to convey fluidic materials from the fluid passage 3085 into the fluid passage 3095. In a preferred embodiment, the fluid passage 3090 is adapted to convey fluidic materials; 10 such as, for example, cement, epoxy, water, drilling mud, or lubricants at operating pressures and flow rates ranging from about O to 9,000 psi and 0 to 3,000 gal I one/minute.
The first inner sealing mandrel 3020 is coupled to the sealing sleeve 3015, the hydraulic slips 3025, and the first lower sealing head 3035. The first inner sealing 15 mandrel 3020 is further movably coupled to the first upper sealing head 3030. The first inner sealing mandrel 3020 preferably comprises a substantially hollow tubular member or members. The first inner sealing mandrel 3020 may be fabricated from any number of conventional commercially available materials such as, for example, oilfield
country tubular goods, low alloy steel, carbon steel, stainless steel, or similar high 2 0 strength materials. In a preferred embodiment, the first inner sealing mandrel 3020 is fabricated from stainless steel in order to optimally provide high strength, corrosion resistance, and low friction surfaces.
The first inner sealing mandrel 3020 may be coupled to the sealing sleeve 3015 using any number of conventional commercially available mechanical couplings such 2 5 as, for example, drillpipe connection, oilfield country tubular goods specialty type
threaded connection, ratchet-latch type threaded connection or a standard threaded connection. In a preferred embodiment, the first inner sealing mandrel 3020 is removably coupled to the sealing sleeve 3015 by a standard threaded connection. The first inner sealing mandrel 3020 may be coupled to the hydraulic slips 3025 using any 30 number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfield country tubular goods specialty type threaded
lq5
O If connection, ratchet-latch type threaded connection or a standard threaded connection.
In a preferred embodiment, the first inner sealing mandrel 3020 is removably coupled to the hydraulic slips 3025 by a standard threaded connection. The first inner sealing mandrel 3020 may be coupled to the first lower sealing head 3035 using any number of 5 conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfeld country tubular goods specialty type threaded connection, ratchet-latch type threaded connection or a standard threaded connection. In a preferred embodiment, the first inner sealing mandrel 3020 is removably coupled to the first lower sealing head 3035 by a standard threaded connection.
10 The first inner sealing mandrel 3020 preferably includes a fluid passage 3095 that is adapted to convey fluidic materials from the fluid passage 3090 into the fluid passage 3100. In a preferred embodiment, the fluid passage 3095 is adapted to convey fluidic materials such as, for example, water, drilling mud, cement, epoxy, or lubricants at operating pressures and flow rates ranging from about O to 9,000 psi and 0 15 to 3, 000 gallons/minute.
Lyle first inner sealing mandrel 3020 further preferably includes fluid passages 3 l l O that are adapted to convey fluidic materials from the fluid passage 3095 into the pressure chambers ofthe hydraulic slips 3025. In this manner, the slips 3025 are activated upon the pressurization of the fluid passage 3095 into contact with the inside 20 surface of the casing 3075. In a preferred embodiment, the fluid passages 3110 are adapted to convey fluidic materials such as, for example, cement, epoxy, water, drilling fluids or lubricants at operating pressures and flow rates ranging from about O to 9,000 psi and 0 to 3,000 gallons/minute.
The first inner sealing mandrel 3020 flusher preferably includes fluid passages 2 5 31 15 that are adapted to convey fluidic materials from the fluid passage 3095 into the first pressure chamber 3175 defined by the first upper sealing head 3030, the first lower sealing head 303s, the first inner sealing mandrel 3020, and the first oute sealing mandrel 3040. During operation of the apparatus 3000, pressurization of the pressure chamber 3175 causes the first upper sealing head 3030, the first outer sealing 30 mandrel 3040, the second upper sealing head 30so, the second outer sealing mandrel 3060, and the expansion cone 3070 to move in an axial direction.
O: The slips 3025 are coupled to the outside surface of the first inner sealing mandrel 3020. During operation of the apparatus 3000, the slips 3025 are activated upon the pressurization of the fluid passage 3095 into contact with the inside surface of the casing 3075. In this manner, the slips 3025 maintain the casing 3075 in a 5 substantially stationary position.
The slips 3025 preferably include fluid passages 3125, pressure chambers 3130, spring bias 3135, and slip members 3140. The slips 3025 may comprise any number of conventional commercially available hydraulic slips such as, for example, RTTS packer tungsten carbide hydraulic slips or Model 3L retrievable bridge plug with 10 hydraulic slips. In a preferred embodiment, the slips 3025 comprise RTTS packer tungsten carbide hydraulic slips available from Halliburton Energy Services in order to optimally provide resistance to axial movement of the casing 3075 during the expansion process.
The first upper sealing head 3030 is coupled to the first outer sealing mandrel 15 3040, the second upper scaling head 3050, the second outer sealing mandrel 3060, and the expansion cone 3070. The first upper sealing head 3030 is also movably coupled to the outer surface of the first inner sealing mandrel 3020 and the inner surface of the casing 3075. In this manucr, the first upper sealing head 3030, the first outer sealing mandrel 3040, the second upper sealing head 3050, the second outer sealing mandrel 20 3060, and the expansion cone 3070 reciprocate in the axial direction.
The radial clearance between the inner cylindrical surface of the first upper sealing head 3030 and the outer surface of the first inner sealing mandrel 3020 may range, for example, from about 0.0025 to 0.05 inches. In a preferred embodiment, the radial clearance between the inner cylindrical surface of the first upper sealing head 25 3030 and the outer surface of the first inner sealing mandrel 3020 ranges from about 0.005 to 0.01 inches in order to optimally provide minimal radial clearance. The radial clearance between the outer cylindrical surface of the first upper sealing head 3030 and the inner surface of the casing 3075 may range, for example, from about 0.025 to 0.375 inches. In a preferred embodiment, the radial clearance between the outer cylindrical 30 surface of the first upper sealing head 3030 and the inner surface of the casing 3075
o c ranges from about 0.025 to 0.125 inches in order to optimally provide stabilization for the expansion cone 3070 during the expansion process.
The first upper sealing head 3030 preferably comprises an annular member having substantially cylindrical inner and outer surfaces. The first upper sealing head 5 3030 may be fabricated from any number of conventional commercially available materials such as, for exurnple, oilfield country tubular goods, low alloy steel, carbon
steel, or other similar high strength materials. In a preferred embodiment, the first upper sealing head 3030 is fabricated from stainless steel in order to optimally provide: high strength, corrosion resistance, and low friction surfaces. The inner surface of the 1 0 first upper sealing head 3030 preferably includes one or more annular sealing members 3145 for sealing the interface between the first upper sealing head 3030 and the first inner sealing mandrel 3020. The sealing members 3145 may comprise any number of conventional commercially available annular sealing members such as, for example, o rings, polypak seals or metal spring energized seals. In a preferred embodiment, the 15 sealing members 3145 comprise polypak seals available from Parker seals in order to optimally provide sealing for a long axial stroke.
In a preferred embodiment, the first upper sealing head 3030 includes a shoulder 3150 for supporting the first upper sealing head 3030, first outer sealing mandrel 3040, second upper sealing head 3050, second outer sealing mandrel 3060, 20 and expansion cone 3070 on the first lower sealing head 3035. The first upper sealing head 3030 may be coupled to the first outer sealing mandrel 3040 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfeld country tubular goods specialty type threaded connection, or a standard threaded connection. In a prefer ed e, llbodimen, the first upper sealing 25 head 3030 is removably coupled to the first outer sealing mandrel 3040 by a standard threaded connection. In a preferred embodiment, the mechanical coupling between the first upper sealing head 3030 and the first outer sealing mandrel 3040 includes one or more sealing members 3155 for fluidicly sealing the interface between the first upper sealing head 3030 and the first outer sealing mandrel 3040. The sealing 30 members 3155 may comprise any number of conventional commercially available sealing members such as, for example, o-rings, polypak seals, or rmctal spring o cat energized seals. In a preferred embodiment, the sealing members 3 l
S5 comprise polypak seals available from Parker Seals in order to optimally provide sealing for a long axial stroke.
The first lower sealing head 3035 is coupled to the first inner sealing mandrel 5 3020 and the second inner sealing mandrel 3045. The first lower sealing head 3035 is also movably coupled to the inner surface of the first outer sealing mandrel 3040. In this manner, the first upper sealing head 3030, first outer sealing mandrel 3040, second upper sealing head 3050, second outer sealing mandrel 3060, and expansion cone 3070 reciprocate in the axial direction. The radial clearance between the outer surface of the 10 first lower sealing head 3035 and the inner surface of the first outer sealing mandrel 3040 may range, for example, from about 0.0025 to 0.05 inches. In a preferred embodiment, the radial clearance between the outer surface of the first lower sealing head 3035 and the inner surface of the outer sealing mandrel 3040 ranges from about 0.005 to O.O l inches in order to optimally provide minimal radial clearance.
15 The first lower sealing head 3035 preferably comprises an annular member having substantially cylindrical inner and outer surfaces. The first lower sealing head 3035 may be fabricated from any number of conventional commercially available materials such as, for example, oilfeld country tubular goods, low alloy steel, carbon steel, stainless steel or other similar high strength materials. In a preferred 20 embodiment, the first lower sealing head 3035 is fabricated from stainless steel in order to optimally provide high strength, corrosion resistance, and low friction surfaces. The outer surface of the first lower sealing head 3035 preferably includes one or more annular sealing members 3 l 60 for sealing the interface between the first lower sealing head 3035 and the first outer sealing mandrel 3040. The sealing 25 members 3160 may comprise any number of conventional commercially available annular sealing members such as, for example, o-rings, polypak seals, or metal spring energized seals. In a preferred embodiment, the sealing members 3160 comprise polypak seals available from Parker Seals in order to optimally provide sealing for a long axial stroke.
30 The first lower sealing head 3035 may be coupled to the first inner sealing mandrel 3020 using any number of conventional commercially available mechanical
o U - couplings such as, for example, drillpipe connection, oilfield country tubular goods
specialty type threaded connection, ratchet-latch type threaded connection or a standard threaded connection. In a preferred embodiment, the first lower sealing head 3035 is removably coupled to the first inner sealing mandrel 3020 by a standard 5 threaded connection. In a preferred embodiment, the mechanical coupling between the f rst lower sealing head 3035 and the first inner sealing mandrel 3020 includes one or more sealing members 3 65 for fluidicly sealing the interface between the first lower sealing head 3035 and the first inner sealing mandrel 3020. The sealing members 3 l 65 may comprise any number of conventional commercial ly avai fable 10 sealing members such as, for example, o-rings, polypak seals, or metal spring energized seals. In a preferred embodiment, the sealing members 3 l 65 comprise polypak seals available from Parker Seals in order to optimally provide sealing for a long axial stroke length.
The first lower sealing head 3035 may be coupled to the second inner sealing 15 mandrel 3045 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfield country tubular goods
specialty type threaded connection, ratchet-latch type threaded connection or a standard threaded connection. In a preferred embodiment, the first lower sealing head 3035 is removably coupled to the second inner sealing mandrel 3045 by a standard 2 0 threaded connection. In a preferred embodiment, the mechanical coupling between the first dower sealing head 3035 and the second inner sealing mandrel 3045 includes one or more sealing members 3 l 70 for fluidicly sealing the interface between the first lower sealing head 3035 and the second inner sealing mandrel 3045. The sealing members 3 l 70 may comprise any number of convcntiona] commercially available 2 5 sealing members such as, for example, o-rings, polypak seals or metal spring energized seals. In a preferred embodiment, the sealing members 3 l 70 comprise polypak seals available from Parker Seals in order to optimally provide sealing for a long axial stroke. The first outer sealing mandrel 3040 is coupled to the first upper sealing head 30 3030 and the second upper sealing head 3050. The first outer sealing mandrel 3040 is also movably coupled to the inner surface ofthc casing 3075 and the outer surface of
on the first lower sealing head 3035. In this manner, the first upper sealing head 3030, first outer sealing mandrel 3040, second upper sealing head 3050, second outer sealing mandrel 3060, and the expansion cone 3070 reciprocate in the axial direction. The radial clearance between the outer surface of the first outer sealing mandrel 3040 and 5 the inner surface of the casing 3075 may range, for example, from about 0.025 to 0. 375 inches. In a preferred embodiment, the radial clearance between the outer surface of the first outer sealing mandrel 3040 and the inner surface of the casing 3075 ranges from about 0.025 to 0.125 inches in order to optimally provide stabilization for the expansion cone 3070 during the expansion process. The radial clearance between the 10 inner surface of the first outer sealing mandrel 3040 and the outer surface of the first lower sealing head 3035 may range, for example, from about 0. 005 to 0.125 inches. In a preferred embodiment, the radial clearance between the inner surface of the first outer sealing mandrel 3040 and the outer surface ofthe first lower sealing head 3035 ranges from about 0.005 to O.Ol inches in order to optimally provide minimal radial 15 clearance. The first outer sealing mandrel 3040 preferably comprises an annular member having substantially cylindrical inner and outer surfaces. The first outer sealing mandrel 3040 may be fabricated from any number of conventional commercially available materials such as, for example, oilfield country tubular goods, low alloy
20 steel, carbon steel, stainless steel or other similar high strength materials. In a preferred embodiment, the first outer sealing mandrel 3040 is fabricated from stainless steel in order to optimally provide high strength, corrosion resistance, and low friction surfaces. The first outer sealing mandrel 3040 may be coupled to the first upper sealing 25 head 3030 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfield country tubular goods
specialty type threaded connection, ratchet-latch type threaded connection or a standard threaded connection. In a preferred embodiment, the first outer sealing mandrel 3040 is removably coupled to the first upper sealing head 3030 by a standard 30 threaded connection. In a preferred embodiment, the mechanical coupling between the first outer scaling mandrel 3040 and the first upper sealing head 3030 includes one or
more sealing members 3 l 80 for sealing the interface between the first outer sealing mandrel 3040 and the first upper sealing head 3030. The sealing members 3 l 80 may comprise any number of conventional commercially available sealing members such as, for example, o-rings, polypak seals or metal spring energized seals. In a preferred 5 embodiment, the sealing members 3 l 80 comprise polypak seals available from Parker Seals in order to optimally provide sealing for a long axial stroke.
The first outer sealing mandrel 3040 may be coupled to the second upper sealing head 3050 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfield country
10 tubular goods specialty type threaded correction, ratchet-latch type threaded connection, or standard threaded connection. In a preferred embodiment, the first outer sealing mandrel 3040 is removably coupled to the second upper sealing head 3050 by a standard threaded connection. In a preferred embodiment, the mechanical coupling between the first outer sealing mandrel 3040 and the second upper sealing 15 head 3050 includes one or more sealing members 3 l 85 for sealing the interface between the first outer sealing mandrel 3040 and the second upper sealing head 3050.
The sealing members 3 l 85 may comprise any number of conventional commercially available sealing members such as, for example, o-rings, polypak seals or metal spring energized seals. In a preferred embodiment, the sealing members 3 l 85 comprise 2 0 polypak seals available from Parker Seals in order to optimally provide sealing for a long axial stroke.
The second inner sealing mandrel 3045 is coupled to the first lower sealing head 3035 and the second lower sealing head 3055. The second inner sealing mandrel 3045 preferably Go-m-prises a substantially hollow tubular member or members. The 2 5 second inner sealing mandrel 3045 may be fabricated from any number of conventional commercially available materials such as, for example, oilfield country
* tubular goods, low alloy steel, carbon steel, stainless steel or other similar high strength materials. In a preferred embodiment, the second inner sealing mandrel 3045 is fabricated from stainless steel in order to optimally provide high strength, corrosion 3 0 resistance, and low friction surfaces.
o c The second inner sealing mandrel 3045 may be coupled to the first lower sealing head 3035 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfield country
tubular goods specialty type threaded connection, ratchet-latch type threaded 5 connection or a standard threaded connection. In a preferred embodiment, the second inner sealing mandrel 3045 is removably coupled to the first lower sealing head 3035 by a standard threaded connection. The second inner sealing mandrel 3045 may be coupled to the second lower sealing head 3055 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe 10 connection, oilfield country tubular goods specialty type threaded connection, ratchet
latch type connection, or a standard threaded connection. In a preferred embodiment, the second inner sealing mandrel 3045 is removably coupled to the second lower sealing head 3055 by a standard threaded connection.
The second inner sealing mandrel 3045 preferably includes a fluid passage 15 3100 that is adapted to convey fluidic materials from the fluid passage 3095 into the fluid passage 3 l O5. In a preferred embodiment, the fluid passage 3100 is adapted to convey fluidic materials such as, for example, cement, epoxy, water, drilling mud or lubricants at operating pressures and flow rates ranging from about O to 9,000 psi and 0 to 3,000 gallons/minute.
20 The second inner sealing mandrel 3045 further preferably includes fluid passages 3 l 20 that are adapted to convey fluidic materials from the fluid passage 3 l DO into the second pressure chamber 3190 defined by the second upper sealing head 3050, the second lower sealing head 3055, the second inner sealing mandrel 3045, and the second outer sealing mandrel 3060. During operation of the apparatus 3000, 5 pressurization of the second pressure chamber 3190 causes the first upper sealing head 3030, the first outer sealing mandrel 3040, the second upper sealing head 3050, the second outer sealing mandrel 3060, and the expansion cone 3070 to move in an axial direction. The second upper sealing head 3050 is coupled to the first outer sealing 30 mandrel 3040 and the second outer sealing mandrel 3060. The second upper sealing head 3050 is also movably coupled to the outer surface of the second inner sealing
o mandrel 3045 and the inner surface ofthe casing 3075. In this manner, the second upper sealing head 3050 reciprocates in the axial direction. The radial clearance between the inner cylindrical surface of the second upper sealing head 3050 and the outer surface of the second inner sealing mandrel 3045 may range, for example, from 5 about 0.0025 to 0.05 inches. In a preferred embodiment, the radial clearance between the inner cylindrical surface of the second upper sealing head 3050 and the outer surface of the second inner sealing mandrel 3045 ranges from about 0.005 to 0.01 inches in order to optimally provide minimal radial clearance. The radial clearance between the outer cylindrical surface of the second upper sealing head 3050 and the 10 inner surface ofthe casing 3075 may range, for example, from about 0.025 to 0.3?5 inches. In a preferred embodiment, the radial clearance between the outer cylindrical surface of the second upper sealing head 3050 and the inner surface of the casing 3075 ranges from about 0.025 to 0.125 inches in order to optimally provide stabilization for the expansion cone 3070 during the expansion process.
15 The second upper sealing head 3050 preferably comprises an annular member having substantially cylindrical inner and outer surfaces. The second upper sealing head 3050 may be fabricated from any number of conventional commercially available materials such as, for example, oilfield country tubular goods, low alloy steel, carbon
steel, stainless steel or other similar high strength materials. In a preferred 20 embodiment, the second upper sealing head 3050 iS fabricated from stainless steel in order to optimally provide high strength, corrosion resistance, and low friction surfaces. T he inner surface ofthe second upper sealing head 30SO preferably includes one or more annular sealing members 3195 for sealing the interface between the second upper seating head 305n and the second ironer sealing mandrel 3045. the 2 5 sealing members 3195 may comprise any number of conventional commercially available annular sealing members such as, for example, o- rings, polypak seals or metal spring energized seals. In a preferred embodiment, the sealing members 3195 comprise polypalc seals available from Parker Seals in order to optimally provide sealing for a long axial stroke.
30 In a preferred embodiment, the second upper sealing head 3050 includes a shoulder 3200 for supporting the first upper sealing head 3030, first outer sealing
c mandrel 3040, second upper sealing head 3050, second outer sealing mandrel 3060, and expansion cone 3070 on the second lower sealing head 3055.
The second upper sealing head 3050 may be coupled to the first outer sealing mandrel 3040 using any number of conventional commercially available mechanical 5 couplings such as, for example' drillpipe connection, oilfield country tubular goods
specialty type threaded connection, ratchet-latch type threaded connection, or a standard threaded connection. In a preferred embodiment, the second upper sealing head 3050 is removably coupled to the first outer sealing mandrel 3040 by a standard threaded connection. In a preferred embodiment, the mechanical coupling between 10 the second upper sealing head 3050 and the first outer sealing mandrel 3040 includes one or more sealing members 3185 for fluidicly sealing the interface between the second upper sealing head 3050 and the first outer sealing mandrel 3040. The second upper sealing head 3050 may be coupled to the second outer sealing mandrel 3060 using any number of conventional commercially available mechanical couplings such 15 as, for example, drillpipe connection, oilfield country tubular goods specialty type
threaded connection, ratchet-latch type threaded connection, or a standard threaded connection. In a preferred embodiment, the second upper scaling head 3050 is removably coupled to the second outer sealing mandrel 3060 by a standard threaded connection. In a preferred embodiment, the mechanical coupling between the second 2 0 upper sealing head 3050 and the second outer sealing mandrel 3060 includes one or more sealing members 3205 for fluidicly sealing the interface between the second upper sealing head 3050 and the second outer sealing mandrel 3060.
The second lower sealing head 3055 is coupled to the second inner sealing mandrel 3045 and the load mandrel 3065. The second lower sealing head 3055 is also 25 movably coupled to the inner surface of the second outer sealing mandrel 3060. In this manner, the first upper sealing head 3030, first outer sealing mandrel 3040, second upper sealing mandrel 3050, second outer sealing mandrel 3060, and expansion cone 3070 reciprocate in the axial direction. The radial clearance between the outer surface of the second lower sealing head 3055 and the inner surface of the second outer sealing 30 mandrel 3060 may range, for example, from about 0.0025 to 0.05 inches. In a preferred embodiment, the radial clearance between the outer surface ofthe second
o r lower sealing head 3055 and the inner surface of the second outer sealing mandrel 3060 ranges from about 0.005 to 0.01 inches in order to optimally provide minimal radial clearance.
The second lower sealing head 3055 preferably comprises an annular member 5 having substantially cylindrical inner and outer surfaces. The second lower sealing head 3055 may be fabricated from any number of conventional commercially available materials such as, for example, oilfield country tubular goods, low alloy steel, carbon
steel, stainless steel, or other similar high strength materials. In a preferred embodiment, the second lower sealing head 3055 is fabricated from stainless steel in 10 order to optimally provide high strength, corrosion resistance, and low friction surfaces. The outer surface of the second lower sealing head 3055 preferably includes one or more annular sealing members 3210 for sealing the interface between the second lower sealing head 3055 and the second outer sealing mandrel 3060. The sealing members 3210 may comprise any number of conventional commercially 15 available annular sealing members such as, for example, o-rings, polypak seals, or metal spring energized seals. In a preferred embodiment, the sealing members 3210 comprise polypak seals available from Parker Seals in order to optimally provide sealing for long axial strokes.
The second lower sealing head 3055 may be coupled to the second inner sealing 20 mandrel 3045 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfield country tubular goods
specialty type threaded connection, or a standard threaded connection. In a preferred embodiment, the second lower sealing head 3055 is removably coupled to the second inner sealing mandre! 3045 by a standard threaded corulecion. in a preferred 25 embodiment, the mechanical coupling between the lower sealing head 3055 and the second inner sealing mandrel 3045 includes one or more sealing members 3215 for fluidicly sealing the interface between the second lower sealing head 3055 and the second inner sealing mandrel 3045. The sealing members 3215 may comprise any number of conventional commercially available sealing members such as, for example, 30 o-rings, polypak seals or metal spring energized seals. In a preferred embodiment, the 1.96
o c sealing members 3215 comprise polypak seals available from Parker Seals in order to optimally provide sealing for long axial strokes.
The second lower sealing head 3055 may be coupled to the load mandrel 3065 using any number of conventional commercially available mechanical couplings such 5 as, for example, drillpipe connection, oilfield country tubular goods specialty type
threaded connection, or a standard threaded connection. In a preferred embodiment, the second lower sealing head 3055 is removably coupled to the load mandrel 3065 by a standard threaded connection. In a preferred embodiment, the mechanical coupling between the second lower sealing head 3055 and the load mandrel 3065 includes one 10 or more sealing members 3220 for fluidicly sealing the interface between the second lower sealing head 3055 and the load mandrel 3065. The sealing members 3220 may comprise any number of conventional commercially available sealing members such as, for example, o-rings, polypal- seals or metal spring energized seals. In a preferred embodiment, the sealing members 3220 comprise polypak seals available from Parker 15 Seals in order to optimally provide sealing for a long axial stroke.
In a preferred embodiment, the second lower sealing head 3055 includes a throat passage 3225 fluidicly coupled between the fluid passages 3100 and 3105. The throat passage 3225 is preferably of reduced size and is adapted to receive and engage with a plug 3230, or other similar device. In this manner, the fluid passage 3100 is 20 fluidicly isolated from the fluid passage 3105. In this manner, the pressure chambers 3175 and 3190 are pressurized. Furthermore, the placement of the plug 3230 in the throat passage 3225 also pressurizes the pressure chambers 3130 of the hydraulic slips 3025. The second outer sealing mandrel 3060 is coupled to the second upper sealing 25 head 3050 and the expansion cone 3070. The second outer sealing mandrel 3060 is also movably coupled to the inner surface of the casing 3075 and the outer surface of the second lower sealing head 3055. In this manner, the first upper sealing head 3030, first outer sealing mandrel 3040, second upper sealing head 3050, second outer sealing mandrel 3060, and the expansion cone 3070 reciprocate in the axial direction. The 30 radial clearance between the outer surface of the second outer sealing mandrel 3060 and the inner surface of the casing 3075 may range, for example, from about 0.025 to
o 0.375 inches. In a preferred embodiment, the radial clearance between the outer surface of the second outer sealing mandrel 3060 and the inner surface of the casing 3075 ranges from about 0.025 to 0. l 25 inches in order to optimally provide stabilization for the expansion cone 3070 during the expansion process. The radial 5 clearance between the inner surface of the second outer sealing mandrel 3060 and the outer surface of the second lower sealing head 3055 may range, for example, from about 0. 0025 to 0.05 inches. In a preferred embodiment, the radial clearance between the inner surface of the second outer sealing mandrel 3060 and the outer surface of the second lower sealing head 3055 ranges from about 0.005 to O.Ol inches in order to 10 optimally provide minimal radial clearance.
The second outer sealing mandrel 3060 preferably comprises an annular member having substantially cylindrical inner and outer surfaces. The second outer sealing mandrel 3060 may be fabricated from any number of conventional commercially available materials such as, for example, oilfeld country tubular goods, 15 low alloy steel, carbon steel, stainless steel or other similar high strength materials. In a preferred embodiment, the second outer sealing mandrel 3060 is fabricated from stainless steel in order to optimally provide high strength, corrosion resistance, and low friction surfaces.
The second outer sealing mandrel 3060 may be coupled to the second upper 20 sealing head 3050 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfield country
tubular goods specialty type threaded connection, or a standard threaded connection.
In a preferred embodiment, the outer sealing mandrel 3060 is removably coupled to the second upper sealing head 3050 by a standard threaded connections The second outer 25 sealing mandrel 3060 may be coupled to the expansion cone 3070 using any number of conventional commercially available mechanical couplings such as, for example, drillpipe connection, oilfield country tubular goods specialty type threaded connection,
or a standard threaded connection. In a preferred embodiment, the second outer sealing mandrel 3060 is removably coupled to the expansion cone 3070 by a standard 30 threaded connection.
f The first upper sealing head 3030, the first lower sealing head 3035, the first inner sealing mandrel 3020, and the first outer sealing mandrel 3040 together define the first pressure chamber 3175. The second upper sealing head 3050, the second lower sealing head 3055, the second inner sealing mandrel 3045, and the second outer 5 sealing mandrel 3060 together define the second pressure chamber 3190. The first and second pressure chambers, 3175 and 3190, are fluidicly coupled to the passages, 3095 and 3100, via one or more passages, 3115 and 3120. During operation of the apparatus 3000, the plug 3230 engages with the throat passage 3225 to fluidicly isolate the fluid passage 3100 from the fluid passage 3105. The pressure chambers, 3175 and 3190, are 10 then pressurized which in turn causes the first upper sealing head 3030, the first outer sealing mandrel 3040, the second upper sealing head 3050, the second outer sealing mandrel 3060, and expansion cone 3070 to reciprocate in the axial direction. The axia motion of the expansion cone 3070 in turn expands the casing 3075 in the radial direction. The use of a plural ity of pressure chambers, 3175 and 3190, effectively 15 multiplies the available driving force for the expansion cone 3070.
The load mandrel 3065 is coupled to the second lower sealing head 3055. The load mandrel 3065 preferably comprises an annular member having substantially cylindrical inner and outer surfaces. The load mandrel 3065 may be fabricated from any number of conventional commercially available materials such as, for example, 20 oilfield country tubular goods, low alloy steel, carbon steel, stainless steel or other
similar high strength materials. In a preferred embodiment, the load mandrel 3065 is fabricated from stainless steel in order to optimally provide high strength, corrosion resistance, and low friction surfaces.
The load mandrel 3065 may be coupled to the lower sealing head 3055 using 25 any number of conventional commercially available mechanical couplings such as, for example, epoxy, cement, water, drilling mud, or lubricants. In a preferred embodiment, the load mandrel 3065 is removably coupled to the lower sealing head 3055 by a standard threaded connection.
The load mandrel 3065 preferably includes a fluid passage 3105 that is adapted 30 to convey fluidic materials from the fluid passage 3100 to the region outside of the apparatus 3000. In a preferred embodiment' the fluid passage 3105 is adapted to l9g
o - - convey fluidic materials such as, for example, cement, epoxy, water, drilling mud or lubricants at operating pressures and flow rates ranging from about O to 9,000 psi and 0 to 3,000 gallons/minute.
The expansion cone 3070 is coupled to the second outer sealing mandrel 3060.
5 The expansion cone 3070 is also movably coupled to the inner surface of the casing 3075. In this manner, the first upper sealing head 3030, first outer sealing mandrel 3040, second upper sealing head 3050, second outer sealing mandrel 3060, and the expansion cone 3070 reciprocate in the axial direction. The reciprocation of the expansion cone 3070 causes the casing 3075 to expand in the radial direction.
1 O The expansion cone 3070 preferably comprises an annular member having substantially cylindrical inner and conical outer surfaces. The outside radius of the outside conical surface may range, for example, from about 2 to 34 inches. In a preferred embodiment, the outside radius of the outside conical surface ranges from about 3 to 28 inches in order to optimally provide an expansion cone 3070 for 1 5 expanding typical casings. The axial length of the expansion cone 3070 may range, for example, from about 2 to 8 times the maximum outer diameter of the expansion cone 3070. In a preferred embodiment, the axial length of the expansion cone 3070 ranges from about 3 to 5 times the maximum outer diameter of the expansion cone 3070 in order to optimally provide stabilization and centralization of theexpansion cone 3070 2 0 during the expansion process In a particularly preferred embodiment, the maximum outside diameter of the expansion cone 3070 is between about 9S to 99 % of the inside diameter of the existing wellbore that the casing 3075 will be joined with. In a preferred embodiment, the angle of attack of the expansion cone 3070 ranges from about to 30 degrees in order to optimally balance the frictional forces with the radial 2 5 expansion forces.
The expansion cone 3070 may be fabricated from any number of conventional commercially available materials such as, for example, machine tool steel, nitride steel, titanium, tungsten carbide, ceramics, or other similar high strength materials. In a preferred embodiment, the expansion cone 3070 is fabricated from D2 machine tool 33 steel in order to optimally provide high strength and resistance to wear and galling. In a particularly preferred embodiment, the outside surface of the expansion cone 3070
o has a surface hardness ranging from about 58 to 62 Rockwell C in order to optimally provide high strength and resistance to wear and galling.
The expansion cone 3070 may be coupled to the second outside sealing mandrel 3060 using any number of conventional commercially available mechanical 5 couplings such as, for example, drillpipe connection, oilfield country tubular goods
specialty type threaded connection, ratchet-latch type connection or a standard threaded connection. In a preferred embodiment, the expansion cone 3070 is coupled to the second outside sealing mandrel 3060 using a standard threaded connection in order to optimally provide high strength and easy disassembly.
10 The casing 3075 is removably coupled to the slips 3025 and the expansion cone 3070. The casing 3075 preferably comprises a tubular member. The casing 3075 may be fabricated from any number of conventional commercially available materials such as, for example, slotted tubulars, oilfeld country tubular goods, carbon steel, low alloy steel, stainless steel, or other similar high strength materials. In a preferred 15 embodiment, the casing 3075 is fabricated from oilfield country tubular goods
available from various foreign and domestic steel mills in order to optimally provide high strength.
In a preferred embodiment, the upper end 3235 of the casing 3075 includes a thin wall section 3240 and an outer annular sealing member 3245. In a preferred 2 0 embodiment, the wall thickness of the thin wall section 3240 is about 50 to l DO % of the regular wall thickness of the casing 3075. In this manner, the upper end 3235 of the casing 3075 may be easily radially expanded and deformed into intimate contact with the lower end of an existing section of wellbore casing. In a preferred embodiment, the lower end of the existing section of casing also includes a thin wall 25 section. In this manner, the radial expansion of the thin walled section 3240 of casing 3075 into the thin walled section of the existing vvellbore casing results in a wellbore casing having a substantially constant inside diameter.
The annular sealing member 3245 may be fabricated from any number of conventional commercially available sealing materials such as, for example, epoxy, 30 rubber, metal or plastic. In a preferred embodiment, the annular sealing member 3245 is fabricated from StrataLock epoxy in order to optimally provide compressibility and
o HL wear resistance. The outside diameter of the annular sealing member 3245 preferably ranges from about 70 to 95 % of the inside diameter of the lower section of the wellbore casing that the casing 3075 is joined to. In this manner' after radial expansion, the annular sealing member 3245 optimally provides a fluidic seal and also 5 preferably optimally provides sufficient frictional force with the inside surface of the existing section of wellbore casing during the radial expansion of the casing 3075 to support the casing 3075.
In a preferred embodiment, the lower end 3250 of the casing 3075 includes a thin wall section 3255 and an outer annular sealing member 3260. In a preferred 10 embodiment, the wall thickness ofthe thin wall section 3255 is about 50 to 10() % of the regular wall thickness of the casing 3075. In this manner, the lower end 3250 of the casing 3075 may be easily expanded and deformed. Furthermore, in this manner, an other section of casing may be easily joined with the lower end 3250 of the casing 3075 using a radial expansion process. In a preferred embodiment, the upper end of 15 the other section of casing also includes a thin wall section. In this manner, the radial expansion of the thin walled section of the upper end of the other casing into the thin walled section 3255 ofthe lower end 3250 of the casing 3075 results in a wellbore casing having a substantially constant inside diameter.
The upper annular sealing member 3245 may be fabricated from any number of 20 conventional commercially available sealing materials such as, for example, epoxy, rubber, metal or plastic. In a preferred embodiment, the upper annular sealing member 3245 is fabricated from Stratalock epoxy in order to optimally provide compressibility and resistance to wear. The outside diameter of the upper annular sealing member 3245 preferably ranges from about 70 to 95 To of the inside diameter oi the lower 2 s section of the existing wellbore casing that the casing 3075 is joined to. In this manner, after radial expansion, the upper annular sealing member 3245 preferably provides a fluidic seal and also preferably provides sufficient frictional force with the inside wall of the wellbore during the radial expansion of the casing 3075 to support the casing 3075.
30 The louver annular sealing member 3260 may be fabricated from any number of conventional commercially available sealing materials such as, for example, epoxy,
o rubber, metal or plastic. In a preferred embodiment, the lower annular sealing member 3260 is fabricated from StrataLock epoxy in order to optimally provide compressibility and resistance to wear. The outside diameter of the lower annular sealing member 3260 preferably ranges from about 70 to 95 % of the inside diameter of the lower 5 section of the existing wellbore casing that the casing 3075 is joined to. In this mariner, the lower annular sealing member 3260 preferably provides a fluidic seal and also preferably provides sufficient frictional force with the inside wall of the wellbore during the radial expansion of the casing 3075 to support the casing 3075.
During operation, the apparatus 3000 is preferably positioned in a wellbore 10 with the upper end 3235 of the casing 3075 positioned in an overlapping relationship with the lower end of an existing wellbore casing. In a particularly preferred embodiment, the thin wall section 3240 of the casing 3075 is positioned in opposing overlapping relation with the thin wall section and outer annular sealing member of the lower end of the existing section of wellbore casing. In this manner, the radial 15 expansion of the casing 3075 will compress the thin wall sections and annular compressible members of the upper end 3235 of the casing 3075 and the lower end of the existing wellbore casing into intimate contact. During the positioning of the apparatus 3000 in the wellbore, the casing 3000 is preferably supported by the expansion cone 3070.
20 After positioning the apparatus 3000, a first fluidic material is then pumped into the fluid passage 3080. The first fluidic material may comprise any number of conventional commercially available materials such as, for example, drilling mud, water, epoxy, cement, slag mix or lubricants. In a preferred embodiment, the first fluidic material comprises a hardenable fluidic sealing material such as, for example, 25 cement, epoxy, or slag mix in order to optimally provide a hardenable outer annular body around the expanded casing 3075.
The first fluidic material may be pumped into the fluid passage 3080 at operating pressures and flow rates ranging, for example, from about O to 4,500 psi and O to 4,500 gallons/minute. In a preferred embodiment, the first fluidic material is 30 pumped into the fluid passage 3080 at operating pressures and flow rates ranging from 2G3
O f about O to 3,500 psi and 0 to 1,200 gallons/minute in order to optimally provide operating efficiency.
The first fluidic material pumped into the fluid passage 3080 passes through the fluid passages 3085, 3090, 3095, 3100, and 3105 and then outside of the apparatus 5 3000. The first fluidic material then preferably fills the annular region between the outside ofthe apparatus 3000 and the interior walls ofthe wellbore.
The plug 3230 is then introduced into the fluid passage 3080. The plug 3230 lodges in the throat passage 3225 and fluidicly isolates and blocks off the fluid passage 3100. In a preferred embodiment, a couple of volumes of a non-hardenable fluidic O material are then pumped into the fluid passage 3080 in order to remove any hardenable fluidic material contained within and to ensure that none of the fluid passages are blocked.
A second fluidic material is then pumped into the fluid passage 3080. The second fluidic material may comprise any number of conventional commercially 15 available materials such as, for example, water, drilling gases, drilling mud or lubricant. In a preferred embodiment, the second fluidic material comprises a non hardenable fluidic material such as, for example, water, drilling mud, drilling gases, or lubricant in order to optimally provide pressurization of the pressure chambers 3175 and 3190.
20 The second fluidic material may be pumped into the fluid passage 3080 at operating pressures and flow rates ranging, for example, from about O to 4,500 psi and O to 4,500 gallons/minute. In a preferred embodiment, the second fluidic material is pumped into the fluid passage 3080 at operating pressures and flow rates ranging from about O to 3,50() nsi and O to 1,200 ga!!ons/lllirlute in order to optimally provide 25 operational efficiency.
The second fluidic material pumped into the fluid passage 3080 passes through the fluid passages 3085, 3090, 3095,3100 and into the pressure chambers 3130 of the slips 3025, and into the pressure chambers 3175 and 3190. Continued pumping of the second fluidic material pressurizes the pressure chambers 3130, 3175, and 3190.
30 The pressurization ofthe pressure chambers 3130 causes the hydraulic slip members 3140 to expand in the radial direction and grip the interior surface of the
o casing 3075. The casing 3075 is then preferably maintained in a substantially stationary position.
The pressurization of the pressure chambers 3175 and 3190 cause the first upper sealing head 3030, first outer sealing mandrel 3040, second upper sealing head 5 3050, second outer sealing mandrel 3060, and expansion cone 3070 to move in an axial direction relative to the casing 3075. In this manner, the expansion cone 3070 will cause the casing 3075 to expand in the radial direction, beginning with the lower end 3250 of the casing 3075.
During the radial expansion process, the casing 3075 is prevented from moving 10 in an upward direction by the slips 3025. A length of the casing 3075 is then expanded in the radial direction through the pressurization of the pressure chambers 3175 and 3190. The length of the casing 3075 that is expanded during the expansion process will be proportional to the stroke length of the first upper sealing head 3030, first outer sealing mandrel 3040, second upper sealing head 3050, and expansion cone 3070.
15 Upon the completion of a stroke, the operating pressure of the second fluidic material is reduced and the first upper sealing head 3030, first outer sealing mandrel 3040, second upper sealing head 3050, second outer sealing mandrel 3060, and expansion cone 3070 drop to their rest positions with the casing 3075 supported by the expansion cone 3070. The reduction in the operating pressure of the second fluidic 20 material also causes the spring bias 3135 ofthe slips 3025 to pull the slip members 3140 away from the inside walls of the casing 3075.
The position of the drillpipe 3075 is preferably adjusted throughout the radial expansion process in order to maintain the overlapping relationship between the thin walled sections of the lower end of the existing wellbore casing and the upper end of 25 the casing 3235. In a pretested embodiment, the stroking of the expansion cone 3070 is then repeated, as necessary, until the thin walled section 3240 of the upper end 3235 of the casing 3075 is expanded into the thin walled section ofthe lower end of the existing wellbore casing. In this manner, a wellbore casing is formed including two adjacent sections of casing having a substantially constant inside diameter. This 30 process may then be repeated for the entirety of the wellbore to provide a wellbore casing thousands of feet in length having a substantially constant inside diameter.
o C' In a preferred embodiment, during the final stroke of the expansion cone 3070, the slips 3025 are positioned as close as possible to the thin walled section 3240 of the upper end 3235 of the casing 3075 in order minimize slippage between the casing 3075 and the existing wellbore casing at the end of the radial expansion process.
5 Alternatively, or in addition, the outside diameter of the upper annular sealing member 3245 is selected to ensure sufficient interference fit with the inside diameter of the lower end of the existing casing to prevent axial displacement of the casing 3075 during the fmal stroke. Alternatively, or in addition, the outside diameter of the lower annular sealing member 3260 is selected to provide an interference fit with the inside 1 0 walls of the wellbore at an earlier point in the radial expansion process so as to prevent further axial displacement of the casing 3075. In this final alternative, the interference fit is preferably selected to permit expansion of the casing 3075 by pulling the expansion cone 3070 out of the wellbore, without having to pressurize the pressure chambers 3175 and 3190.
15 During the radial expansion process, the pressurized areas of the apparatus 3000 are preferably limited to the fluid passages 3080, 3085, 3090, 3095, 3100, 3110, 3115, 3120, the pressure chambers 3130 within the slips 3025, and the pressure chambers 3175 and 3190. No fluid pressure acts directly on the casing 3075. This permits the use of operating pressures higher than the casing 3075 could normally 2 0 withstand.
Once the casing 3075 has been completely expanded off of the expansion cone 3070, the remaining portions of the apparatus 3000 are removed from the wellbore. In a preferred embodiment, the contact pressure between the deformed thin wall sections And comp, essible m-lnulaf rnembers of the lower end of the existing casing and the 2 5 upper end 3235 of the casing 3075 ranges from about 400 to 10,000 psi in order to optimally support the casing 3075 using the existing wellbore casing In this manner, the casing 3075 is radially expanded into contact with an existing section of casing by pressurizing the interior fluid passages 3080, 3085, 3090, 3095, 3100, 3110, 3115, and 3120, the pressure chambers 3130 of the slips 3025 and 30 the pressure chambers 3175 and 3190 of the apparatus 3000.
Of In a preferred embodiment, as required, the annular body of hardenable fluidic material is then allowed to cure to form a rigid outer annular body about the expanded casing 3075. In the case where the casing 3075 is slotted, the cured fluidic material preferably permeates and envelops the expanded casing 3075. The resulting new 5 section of wellbore casing includes the expanded casing 3075 and the rigid outer annular body. The overlapping joint between the pre-existing wellbore casing and the expanded casing 3075 includes the deformed thin wall sections and the compressible outer annular bodies. The inner diameter of the resulting combined wellbore casings is substantially constant. In this manner, a mono-diameter wellbore casing is formed.
10 This process of expanding overlapping tubular members having thin wall end portions with compressible annular bodies into contact can be repeated for the entire length of a wellbore. In this manner, a mono- diameter wellbore casing can be provided for thousands of feet in a subterranean formation.
In a preferred embodiment, as the expansion cone 3070 nears the upper end 15 3235 of the casing 3075, the operating now rate of the second fluidic material is reduced in order to minimize shock to the apparatus 3000. In an alternative embodiment, the apparatus 3000 includes a shock absorber for absorbing the shock created by the completion of the radial expansion of the casing 3075.
In a preferred embodiment, the reduced operating pressure of the second fluidic 20 material ranges from about 100 to 1,000 psi as the expansion cone 3070 nears the end of the casing 3075 in order to optimally provide reduced axial movement and velocity ofthe expansion cone 3070. In a preferred embodiment, the operating pressure of the second fluidic material is reduced during the return stroke of the apparatus 3000 to the range of about O to 500 psi in order minimize the resistance to the movement of the 25 expansion cone 3070 during the return stroke. In a preferred embodiment, the stroke length of the apparatus 3000 ranges from about 10 to 45 feet in order to optimally provide equipment that can be easily handled by typical oil well rigging equipment and also minimize the frequency at which the apparatus 3000 must be re-stroked.
In an alternative embodiment, at least a portion of one or both of the upper 30 sealing heads, 3030 and 3050, includes an expansion cone for radially expanding the casing 3075 during operation of the apparatus 3000 in order to increase the surface
o area of the casing 3075 acted upon during the radial expansion process. In this manner, the operating pressures can be reduced.
Alternatively, the apparatus 3000 may be used to join a first section of pipeline to an existing section of pipeline. Alternatively, the apparatus 3000 may be used to 5 directly line the interior of a wellbore with a casing, without the use of an outer annular layer of a hardenable material. Alternatively, the apparatus 3000 may be used to expand a tubular support member in a hole.
Referring now to Figure 21, an apparatus 3330 for isolating subterranean zones will be described. A wellbore 3305 including a casing 3310 are positioned in a 1 0 subterranean formation 3315. The subterranean formation 3315 includes a number of productive and non-productive zones, including a water zone 3320 and a targeted oil sand zone 3325. During exploration of the subterranean formation 3315, the wellbore 3305 may be extended in a well known manner to traverse the various productive and non-productive zones, including the water zone 3320 and the targeted oil sand zone 1 5 3325.
In a preferred embodiment, in order to fluidicly isolate the water zone 3320 from the targeted oil sand zone 332S, an apparatus 3330 is provided that includes one or more sections of solid casing 3335, one or more external seals 3340, one or more sections of slotted casing 3345, one or more intermediate sections of solid casing 3350, 20 and a solid shoe 3355.
The solid casing 3335 may provide a fluid conduit that transmits fluids and other materials from one end of the solid casing 3335 to the other end of the solid casing 3335. The solid casing 3335 may comprise any number of conventional eorn.m.ercially available sections of solid tubular- casing such as, for example, oilfield
2 s tubulars fabricated from chromium steel or fiberglass. In a preferred embodiment' the solid casing 3335 comprises oilfield tubulars available from various foreign and
domestic steel mills.
The solid casing 3335 is preferably coupled to the casing 3310. The solid casing 3335 may be coupled to the casing 3310 using any number of conventional 30 commercially available processes such as, for example, welding, slotted and expandable connectors, or expandable solid connectors. In a preferred embodiment'
o the solid casing 3335 is coupled to the casing 3310 by using expandable solid connectors The solid casing 3335 may comprise a plurality of such solid casings 3335. The solid casing 3335 is preferably coupled to one more of the slotted casings 5 3345. The solid casing 3335 may be coupled to the slotted casing 3345 using any number of conventional commercially available processes such as, for example, welding, or slotted and expandable connectors. In a preferred embodiment, the solid casing 3335 is coupled to the slotted casing 3345 by expandable solid connectors.
In a preferred embodiment, the casing 3335 includes one more valve members 10 3360 for controlling the flow of fluids and other materials within the interior region of the casing 3335. In an alternative embodiment, during the production mode of operation, an internal tubular string with various arrangements of packers, perforated tubing, sliding sleeves, and valves may be employed within the apparatus to provide various options for commingling and isolating subterranean zones from each other 15 while providing a fluid path to the surface.
In a particularly preferred embodiment, the casing 3335 is placed into the wellbore 3305 by expanding the casing 3335 in the radial direction into intimate contact with the interior walls of the wellbore 3305. The casing 3335 may be expanded in the radial direction using any number of conventional commercially 20 available methods. In a preferred embodiment, the casing 3335 is expanded in the radial direction using one or more of the processes and apparatus described within the present disclosure.
The seals 3340 prevent the passage of fluids and other materials within the annular region 3365 between the solid casings 3335 and 3350 and the wellbore 3305.
25 The seals 3340 may comprise any number of conventional commercially available sealing materials suitable for sealing a casing in a wellbore such as, for example, lead, rubber or epoxy. In a preferred embodiment, the seals 3340 comprise Stratalok epoxy material available from Halliburton Energy Services.
The slotted casing 3345 permits fluids and other materials to pass into and out 30 of the interior of the slotted casing 3345 from and to the annular region 3365. In this manner, oil and gas may be produced from a producing subterranean zone within a
c A, subterranean formation. The slotted casing 3345 may comprise any number of conventional commercially available sections of slotted tubular casing. In a preferred embodiment, the slotted casing 3345 comprises expandable slotted tubular casing available from Petroline in Abeerdeen, Scotland. In a particularly preferred 5 embodiment, the slotted casing 145 comprises expandable slotted sandscreen tubular casing available from Petroline in Abeerdeen, Scotland.
The slotted casing 3345 is preferably coupled to one or more solid casing 3335.
The slotted casing 3345 may be coupled to the solid casing 3335 using any number of conventional commercially available processes such as, for example, welding, or 1 0 slotted or solid expandable connectors. In a preferred embodiment, the slotted casing 334S is coupled to the solid casing 3335 by expandable solid connectors.
The slotted casing 3345 is preferably coupled to one or more intermediate solid casings 3350. The slotted casing 3345 may be coupled to the intermediate solid casing 3350 using any number of conventional commercially available processes such as, for 15 example, welding or expandable solid or slotted connectors. In a preferred embodiment, the slotted casing 3345 is coupled to the intermediate solid casing 3350 by expandable solid connectors.
The last section of slotted casing 3345 is preferably coupled to the shoe 3355.
The last slotted casing 3345 may be coupled to the shoe 3355 using any number of 20 conventional commercially available processes such as, for example, welding or expandable solid or slotted connectors. In a preferred embodiment, the last slotted casing 3345 is coupled to the shoe 3355 by an expandable solid connector.
In an alternative embodiment, the shoe 3355 is coupled directly to the last one ofthe intermediate solid casings 3350.
2 5 In a prcterred embodiment, the slotted casings 3345 are positioned within the wellbore 3305 by expanding the slotted casings 3345 in a radial direction into intimate contact with the interior walls of the wellbore 3305. The slotted casings 3345 may be expanded in a radial direction using any number of conventional commercially available processes. In a preferred embodiment, the slotted casings 3345 are expanded 3 () in the radial direction using one or more of the processes and apparatus disclosed in the present disclosure with reference to Figures 14a-00.
of -. The intermediate solid casing 3350 permits fluids and other materials to pass between adjacent slotted casings 3345. The intermediate solid casing 3350 may comprise any number of conventional commercially available sections of solid tubular casing such as, for example, oilfield tubulars fabricated from chromium steel or
5 fiberglass. In a preferred embodiment, the intermediate solid casing 3350 comprises oilfield tubulars available from foreign and domestic steel mills.
The intermediate solid casing 3350 is preferably coupled to one or more sections ofthe slotted casing 3345. The intermediate solid casing 3350 may be coupled to the slotted casing 3345 using any number of conventional commercially 10 available processes such as, for example, welding, or solid or slotted expandable connectors. In a preferred embodiment, the intermediate solid casing 3350 is coupled to the slotted casing 3345 by expandable solid connectors. The intermediate solid casing 3350 may comprise a plurality of such intermediate solid casing 3350.
In a preferred embodiment, each intermediate solid casing 3350 includes one 15 more valve members 3370 for controlling the flow of fluids and other materials within the interior region of the intermediate casing 3350. In an alternative embodiment, as will be recognized by persons having ordinary skill in the art and the benefit of the present disclosure, during the production mode of operation, an internal tubular string
with various arrangements of packers, perforated tubing, sliding sleeves, and valves 20 may be employed within the apparatus to provide various options for commingling and isolating subterranean zones from each other while providing a fluid path to the surface. In a particularly preferred embodiment, the intermediate casing 3350 is placed into the wellbore 3305 by expanding the intermediate casing 3350 in the radial 25 direction into intimate contact with the interior walls ofthe wellbore 3305. The intermediate casing 3350 may be expanded in the radial direction using any number of conventional commercially available methods.
In an alternative embodiment, one or more of the intermediate solid casings 3350 may be omitted. In an alternative preferred embodiment, one or more of the 30 slotted casings 3345 are provided with one or more seals 3340.
o - - The shoe 3355 provides a support member for the apparatus 3330. In this manner, various production and exploration tools may be supported by the show 3350.
The shoe 3350 may comprise any number of conventional commercially available shoes suitable for use in a wellbore such as, for example, cement filled shoe, or an 5 aluminum or composite shoe. In a preferred embodiment, the shoe 3350 comprises an aluminum shoe available from Halliburton. In a preferred embodiment, the shoe 3355 is selected to provide sufficient strength in compression and tension to permit the use of high capacity production and exploration tools.
In a particularly preferred embodiment, the apparatus 3330 includes a plurality 10 of solid casings 3335, a plurality of seals 3340, a plurality of slotted casings 3345, a plurality of intermediate solid casings 3350, and a shoe 3355. More generally, the apparatus 3330 may comprise one ormore solid casings 3335, each with one or more valve members 3360, n slotted casings 3345, n-l intermediate solid casings 3350, each with one or more valve members 3370, and a shoe 3355.
15 During operation of the apparatus 3330, oil and gas may be controllably produced from the targeted oil sand zone 3325 using the slotted casings 3345. The oil and gas may then be transported to a surface location using the solid casing 3335. The use of intermediate solid casings 3350 with valve members 3370 permits isolated sections of the zone 3325 to be selectively isolated for production. The seals 3340 20 permit the zone 3325 to be fluidicly isolated from the zone 3320. The seals 3340 further permits isolated sections of the zone 3325 to be fluidicly isolated from each other. In this manner, the apparatus 3330 permits unwanted and/or non-productive subterranean zones to be fluidicly isolated.
In an alternative embodirl.erlt, will be recognized by persons having ordinary 25 skill in the art and also having the benefit of the present disclosure' during the
production mode of operation, an internal tubular string with various arrangements of packers, perforated tubing, sliding sleeves, and valves may be employed within the apparatus to provide various options for commingling and isolating subterranean zones from each other while providing a fluid path to the surface.
30 Referring to Figures 22a, 22b, 22c and 22d, an embodiment of an apparatus 3500 for forming a wellbore casing while drilling a wellbore will now be described. In
o a preferred embodiment, the apparatus 3500 includes a support member 3505, a mandrel 3510, a mandrel launcher 3515, a shoe 3520, atubular member 3525, a mud motor 3530, a drill bit 3535, a first fluid passage 3540, a second fluid passage 3545, a pressure chamber 3550, a third fluid passage 3555, a cup seal 3560, a body of lubricant 5 3565, seals 3570, and a releasable coupling 3600.
The support member 3505 is coupled to the mandrel 3510. The support member 3505 preferably comprises an annular member having sufficient strength to carry and support the apparatus 3500 within the wellbore 3575. In a preferred embodiment, the support member 3505 further includes one or more conventional 10 centralizers (not illustrated) to help stabilize the apparatus 3500.
The support member 3505 may comprise one or more sections of conventional commercially available tubular materials such as, for example, oilfeld country tubular goods, low alloy steel, stainless steel or carbon steel. In a preferred embodiment, the support member 3505 comprises coiled tubing or drillpipe in order to optimally permit 15 the placement of the apparatus 3500 within a non-vertical wellbore.
In a preferred embodiment, the support member 3505 includes a first fluid passage 3540 for conveying fluidic materials from a surface location to the fluid passage 3545. In a preferred embodiment, the first fluid passage 3540 is adapted to convey fluidic materials such as water, drilling mud, cement, epoxy or slag mix at 20 operating pressures and flow rates ranging from about 0 to 10,000 psi and 0 to 3,000 gal lons/minute.
The mandrel 3510 is coupled to and supported by the support member 3505.
The mandrel 3510 is also coupled to and supports the mandrel launcher 3515 and tubular member 3525. The mandrel 3510 is preferably adapted to controllably expand 25 in a radial direction. The mandrel 3510 may comprise any number of conventional commercially available mandrels modified in accordance with the teachings of the present disclosure. In a preferred embodiment, the mandrel 3510 comprises a
hydraulic expansion tool as disclosed in U.S. Patent No. 5,348,095, the contents of which are incorporated herein by reference, modified in accordance with the teachings 3 of the present disclosure.
o In a preferred embodiment, the mandrel 3510 includes one or more conical sections for expanding the tubular member 3525 in the radial direction. In a preferred embodiment, the outer surfaces ofthe conical sections ofthe mandrel 3510 have a surface hardness ranging from about 58 to 62 Rockwell C in order to optimally radially 5 expand the tubular member 3525.
In a preferred embodiment, the mandrel 3510 includes a second fluid passage 3545 fluidicly coupled to the first fluid passage 3540 and the pressure chamber 3550 for conveying fluidic materials from the first fluid passage 3540 to the pressure chamber 3550. In a preferred embodiment, the second fluid passage 3545 is adapted to 10 convey fluidic materials such as water, drilling mud, cement, epoxy or slag mix at operating pressures and flow rates ranging from about O to 12,000 psi and 0 to 3,500 gallons/minute in order to optimally provide operating pressure for efficient operation.
Al he mandrel launcher 3515 is coupled to the tubular member 3525, the mandrel 3510, and the shoe 3520. The mandrel launcher 3515 preferably comprises a tapered 5 annular member that mates with at a portion of at least one of the conical portions of the outer surface of the mandrel 3510. In a preferred embodiment, the wall thickness of the mandrel launcher is less than the wall thickness of the tubular member 3525 in order to facilitate the initiation of the radial expansion process and facilitate the placement of the apparatus in openings having tight clearances. In a preferred 2 0 embodiment, the wall thickness of the mandrel launcher 3515 ranges from about 50 to 100 % ofthe wall thickness ofthe tubular member 3525 immediately adjacent to the mandrel launcher 3515 in order to optimally facilitate the radial expansion process and facilitate the insertion of the apparatus 3500 into wellbore casings and other areas with tight clearances.
2 5 The mandrel launcher 3515 may be fabricated from any number of conventional commercially available materials such as, for example, oilfeld country tubular goods, low alloy steel, carbon steel or stainless steel. In a preferred embodiment, the mandrel launcher 3515 is fabricated from oilfield country tubular
goods of higher strength by lower wall thickness than the tubular member 3525 in 30 order to optimally provide a smaller container having approximately the same burst strength as the tubular member 3525.
21 4
on The shoe 3520 is coupled to the mandrel launcher 3515 and the releasable coupling 3600. The shoe 3520 preferably comprises a substantially annular member.
In a preferred embodiment, the shoe 3520 or the releasable coupling 3600 include a third fluid passage 3555 fluidicly coupled to the pressure chamber 3550 and the mud 5 motor 3530.
The shoe 3520 may comprise any number of conventional commercially available shoes such as, for example, cement filled, aluminum or composite modified in accordance with the teachings of the present disclosure. In a preferred embodiment,
the shoe 3520 comprises a high strength shoe having a burst strength approximately 10 equal to the burst strength of the tubular member 3525 and mandrel launcher 3515.
The shoe 3520 is preferably coupled to the mud motor 3520 by a releasable coupling 3600 in order to optimally provide for removal of the mud motor 3530 and drill nit 3535 upon the completion of a drilling and casing operation.
In a preferred embodiment, the shoe 3520 includes a releasable latch 1 S mechanism 3600 for retrieving and removing the mud motor 3530 and drill bit 3535 upon the completion of the drilling and casing formation operations. In a preferred embodiment, the shoe 3520 further includes an anti-rotation device for maintaining the shoe 3520 in a substantially stationary rotational position during operation of the apparatus 3500. In a preferred embodiment, the releasable latch mechanism 3600 is 20 releasably coupled to the shoe 3520.
The tubular member 3525 is supported by and coupled to the mandrel 3510.
The tubular member 3525 is expanded in the radial direction and extruded off of the mandrel 3510. The tubular member 3525 may be fabricated from any number of conventional commercially available materials such as, for example, Oilfield Country
25 Tubular Goods (OCTG), 13 chromium steel tubing/casing, automotive grade steel, or plastic tubing/casing. In a preferred embodiment, the tubular member 3525 is fabricated from OCTG in order to maximize strength after expansion. The inner and outer diameters of the tubular member 3525 may rarity, for example, from approximately 0.75 to 47 inches and 1.05 to 48 inches, respectively. In a preferred 30 embodiment, the inner and outer diameters ofthe tubular member 3525 range from about 3 to 15.5 inches and 3.5 to 16 inches, respectively in order to optimally provide
o {- minimal telescoping effect in the most commonly drilled wellbore sizes. The tubular member 3525 preferably comprises an annular member with solid walls.
In a preferred embodiment, the upper end portion 3580 of the tubular member 3525 is slotted, perforated, or otherwise modified to catch or slow down the mandrel 5 3510 when the mandrel 3510 completes the extrusion oftubular member 3525. For typical tubular member 3525 materials, the length of the tubular member 3525 is preferably limited to between about 40 to 20,000 feet in length. The tubular member 3525 may comprise a single tubular member or, alternatively, a plurality of tubular members coupled to one another.
10 The mud motor 3530 is coupled to the shoe 3520 and the drill bit 3535. The mud motor 3530 is also fluidicly coupled to the fluid passage 3555. In a preferred embodiment, the mud motor 3530 is driven by fluidic materials such as, for example, drilling mud, water, cement, epoxy, lubricants or slag mix conveyed from the fluid passage 3555 to the mud motor 3530. In this manner, the mud motor 3530 drives the 15 drill bit 3535. The operating pressures and flow rates for operating mud motor 3530 may range, for example, from about O to 12,000 psi and 0 to 10,000 gallons/minute. In a preferred embodiment, the operating pressures and flow rates for operating mud motor 3530 range from about 0 to 5,000 psi and 40 to 3,000 gallons/minute.
The mud motor 3530 may comprise any number of conventional commercially 2 0 available mud motors, modified in accordance with the teachings of the present disclosure. In a preferred embodiment, the size of the mud motor 3520 and drill bit
3535 are selected to pass through the interior of the shoe 3520 and the expanded tubular member 3525. In this manner, the mud motor 3520 and drill bit 3535 may be retrieved from the downhole location upon the cor, clusion of the drilling and casing; 2 5 operations.
The drill bit 3535 is coupled to the mud motor 3530. The drill bit 3535 is preferably adapted to be powered by the mud motor 3530. In this manner, the drill bit 3535 drills out new sections of the wellbore 3575.
The drill bit 3535 may comprise any number of conventional commercially 30 available drill bits, modified in accordance with the teachings of the present disclosure.
In a preferred embodiment, the size of the mud motor 3500 and drill bit, 55 are
o selected to pass through the interior of the shoe 3520 and the expanded tubular member 3525. In this manner, the mud motor 3520 and drill bit 3535 may be retrieved from the downhole location upon the conclusion of the drilling and casing operations.
In several alternative preferred embodiments, the drill bit 3535 comprises an eccentric 5 drill bit, a bi-centered drill bit, or a small diameter drill bit with an hydraulically actuated under reamer.
The first fluid passage 3540 permits fluidic materials to be transported to the second fluid passage 3545, the pressure chamber 3550, the third fluid passage 3555, and the mud motor 3530. The first fluid passage 3540 is coupled to and positioned 10 within the support member 3505. The first fluid passage 3540 preferably extends from a position adjacent to the surface to the second fluid passage 3545 within the mandrel 3510. The first fluid passage 3540 is preferably positioned along a centerline of the apparatus 3500.
The second fluid passage 3545 permits fluidic materials to be conveyed from 15 the first fluid passage 3540 to the pressure chamber 3550, the third fluid passage 3555, and the mud motor 3530. The second fluid passage 3545 is coupled to and positioned within the mandrel 3510. The second fluid passage 3545 preferably extends from a position adjacent to the first fluid passage 3540 to the bottom of the mandrel 3510.
The second fluid passage 3545 is preferably positioned substantially along the 20 centerline of the apparatus 3500.
The pressure chamber 3550 permits fluidic materials to be conveyed from the second fluid passage 3545 to the third fluid passage 3555, and the mud motor 3530.
The pressure chamber is preferably defined by the region below the mandrel 3510 and within the tubular member 3525, mandrel launcher 3515, shoe 3520, and releasable 25 coupling 3600. During operation ofthe apparatus 3500, pressurization ofthe pressure chamber 3550 preferably causes the tubular member 3525 to be extruded off of the mandrel 3510.
The third fluid passage 3555 permits fluidic materials to be conveyed from the pressure chamber 3550 to the mud motor 3530. The third fluid passage 3555 may be 30 coupled to and positioned within the shoe 3520 or releasable coupling 3600. The third fluid passage 3555 preferably extends from a position adjacent to the pressure chamber
o 3550 to the bottom of the shoe 3520 or releasable coupling 3600. The third fluid passage 3555 is preferably positioned substantially along the centerline of the apparatus 3500.
The fluid passages 3540, 3545, and 3555 are preferably selected to convey 5 materials such as cement, drilling mud or epoxies at flow rates and pressures ranging from about O to 3,000 gallons/minute and 0 to 9000 psi in order to optimally operational efficiency.
The cup seal 3560 is coupled to and supported by the outer surface ofthe support member 3505. The cup seal 3560 prevents foreign materials from entering the 1 0 interior region of the tubular member 3525. The cup seal 3560 may comprise any number of conventional commercially available cup seals such as, for example, TP cups or SIP cups modified in accordance with the teachings of the present disclosure.
In a preferred embodiment, the cup seal 3560 comprises a SIP cup, available from Halliburton Energy Services in Dallas, TX in order to optimally block the entry of 1 5 foreign materials and contain a body of lubricant. In a preferred embodiment, the apparatus 3500 includes a plurality of such cup seals in order to optimally prevent the entry of foreign material into the interior region of the tubular member 3525 in the vicinity of the mandrel 3510.
In a preferred embodiment, a quantity of lubricant 3565 is provided in the 2 0 annular region above the mandrel 3510 within the interior of the tubular member 3525.
In this manner, the extrusion of the tubular member 3525 off of the mandrel 35 l O is facilitated. The lubricant 3565 may comprise any number of conventional commercially available lubricants such as, for example, Lubriplate, chlorine based lubricants, oil based lubricants or Climax 150Q Antisieze (3100). In a preferred 25 embodiment, the lubricant 3565 comprises Climax 1500 Antisieze (3100) available from Climax Lubricants and Equipment Co. in Houston, TX in order to optimally provide optimum lubrication to facilitate the expansion process.
The seals 3570 are coupled to and supported by the end portion 3580 of the tubular member 3525. The seals 3570 are further positioned on an outer surface of the 3 0 end portion 3580 of the tubular member 3525. The seals 3570 permit the overlapping joint between the lower end portion 3S85 of a preexisting section of casing 3590 and
o the end portion 3580 of the tubular member 3525 to be fluidicly sealed. The seals 3570 may comprise any number of conventional commercially available seals such as, for example, lead, rubber, Teflon, or epoxy seals modified in accordance with the teachings of the present disclosure. In a preferred embodiment, the seals 3570 are
5 molded from Stratalock epoxy available from Halliburton Energy Services in Dallas, TX in order to optimally provide a load bearing interference fit between the end 3580 of the tubular member 3525 and the end 3585 of the pre-existing casing 3590.
In a preferred embodiment, the seals 3570 are selected to optimally provide a sufficient frictional force to support the expanded tubular member 3525 from the pre 10 existing casing 3590. In a preferred embodiment, the frictional force optimally provided by the seals 3570 ranges from about 1,000 to 1,000,000 Ibf in order to optimally support the expanded tubular member 3525.
The releasable coupling 3600 is preferably releasably coupled to the bottom of the shoe 3520. In a prcLerred embodiment, the releasable coupling 3600 includes 15 fluidic seals for sealing the interface between the releasable coupling 3600 and the shoe 3520. In this manner, the pressure chamber 3550 may be pressurized. The releasable coupling 3600 may comprise any number of conventional commercially available releasable couplings suitable for drilling operations modified in accordance with the teachings of the present disclosure.
2 0 As illustrated in Figure 22A, during operation of the apparatus 3500, the apparatus 3500 is preferably initially positioned within a preexisting section of a wellbore 3575 including a preexisting section of wellbore casing 3590. In a preferred embodiment, the upper end portion 3580 of the tubular member 3525 is positioned in an overlapping relationship with the lower end 3585 of the preexisting section of 25 casing 3590. In a preferred embodiment, the apparatus 3500 is initially positioned in the wellbore 3575 with the drill bit 353 in contact with the bottom ofthe wellbore 3575. During the initial placement of the apparatus 3500 in the wellbore 3575, the tubular member 3525 is preferably supported by the mandrel 3510.
As illustrated in Figure 22B, a fluidic material 3595 is then pumped into the 3 0 first fluid passage 3540. The fluidic material 3595 is preferably conveyed from the first fluid passage 3S40 to the second fluid passage 3545, the pressure chamber 3550, ^19
o the third fluid passage 3555 and the inlet to the mud motor 3530. The fluidic material 3595 may comprise any number of conventional commercially available fluidic materials such as, for example, drilling mud, water, cement, epoxy or slag mix. The fluidic material 3595 may be pumped into the first fluid passage 3540 at operating 5 pressures and flow rates ranging, for example, from about 0 to 9,000 psi and 0 to 3,000 gallons/minute. The fluidic material 3595 will enter the inlet for the mud motor 3530 and drive the mud motor 3530. The fluidic material 3595 will then exit the mud motor 3530 and enter the annular region surrounding the apparatus 3500 within the wellbore 3575.
10 The mud motor 3530 will in turn drive the drill bit 3535. The operation of the drill bit 3535 will drill out a new section ofthe wellbore 3575.
In the case where the fluidic material 3595 comprises a hardenable fluidic material, the fluidic material 3595 preferably is permitted to cure and form an outer annular body surrounding the periphery of the expanded tubular member 3525.
15 Alternatively, in the case where the fluidic material 3595 is a nonhardenable fluidic material, the tubular member 3595 preferably is expanded into intimate contact with the interior walls of the wellbore 3575. In this manner, an outer annular body is not provided in all applications.
As illustrated in Figure 22C, at some point during operation of the mud motor 20 3530 and drill bit 3535, the pressure drop across the mud motor 3530 will create sufficient back pressure to cause the operating pressure within the pressure chamber 3550 to elevate to the pressure necessary to extrude the tubular member 3525 off of the mandrel 3510. The elevation of the operating pressure within the pressure chamber 3550 will then cause the tubular member 3525 to extra de off of the mandre! 35! 0 as 25 illustrated in Figure 22D. For typical tubular members 3525, the necessary operating pressure may range, for example, from about 1,000 to 9,000 psi. In this manner, a wellbore casing is formed simultaneous with the drilling out of a new section of wellbore. In a particularly preferred embodiment, during the operation of the apparatus 30 3500, the apparatus 3500 is lowered into the wellbore 3575 until the drill bit 3535 is proximate the bottom of the wel]bore 3575. Throughout this process, the tubular
o C- member 3525 is preferably supported by the mandrel 3510. The apparatus 3500 is then lowered until the drill bit 3535 is placed in contact with the bottom ofthe wellbore 3575. At this point, at least a portion of the weight of the tubular member 3525 is supported by the drill bit 3535.
5 The fluidic material 3595 is then pumped into the first fluid passage 3540, second fluid passage 3545, pressure chamber 3550, third fluid passage 3555, and the inlet of the mud motor 3530. The mud motor 3530 then drives the drill bit 3535 to drill out a new section of the wellbore 3575. Once the differential pressure across the mud motor 3530 exceeds the minimum extrusion pressure for the tubular member 10 3525, the tubular member 3525 begins to extrude off of the mandrel 3510. As the tubular member 3525 is extruded off of the mandrel 3510, the weight of the extruded portion of the tubular member 3525 is transferred to and supported by the drill bit 3535. In a preferred embodiment, the pumping pressure ofthe fluidic material 3595 is maintained substantially constant throughout this process. At some point during the 15 process of extruding the tubular member 3525 off of the mandrel 3510, a sufficient portion of the weight of the tubular member 3525 is transferred to the drill bit 3535 to stop the extrusion process due to the opposing force. Continued drilling by the drill bit 3535 eventually transfers a sufficient portion of the weight of the extruded portion of the tubular member 3525 back to the mandrel 3510. At this point, the extrusion of the 2 0 tubular member 3525 off of the mandrel 3510 continues. In this manner, the support member 3505 never has to be moved and no drillpipe connections have to be made at the surface since the new section of the wellbore casing within the newly drilled section of wellbore is created by the constant downward feeding of the expanded tubular member 3525 offofthe mandrel 3510.
25 Once the new section of wellbore that is lined with the fully expanded tubular member 3525 is completed, the support member 3505 and mandrel 3510 are removed from the wellbore 3575. The drilling assembly including the mud motor 3530 and drill bit 3535 are then preferably removed by lowering a drillstring into the new section of wellbore casing and retrieving the drilling assembly by using the latch 3600. The 30 expanded tubular member 3525 is then cemented using conventional squeeze
o cementing methods to provide a solid annular sealing member around the periphery of the expanded tubular member 3525.
Alternatively, the apparatus 3500 may be used to repair or form an underground pipeline or form a support member for a structure. In several preferred alternative 5 embodiments, the teachings of the apparatus 3500 are combined with the teachings of the embodiments illustrated in Figures I -21. For example, by operably coupling the mud motor 3530 and drill bit 3535 to the pressure chambers used to cause the radial expansion of the tubular members of the embodiments illustrated and described with reference to Figures 1 -21, the use of plugs may be eliminated and radial expansion of 10 tubular members can be combined with the drilling out of new sections of wellbore Referring now to FIGS.23A, 23B and 23C, an apparatus 3700 for expanding a tubular member will be described. In a preferred embodiment, the apparatus 3700 includes a support member 3705, a packer 3710, a first fluid conduit 3715, an annular fluid passage 3720, fluid inlets 3725, an annular seal 3730, a second fluid conduit 15 3735, a fluid passage 3740, a mandrel 3745, a mandrel launcher 3750, a tubular member 3755, slips 3760, and seals 3765. In a preferred embodiment, the apparatus 3700 is used to radially expand the tubular member 3755. In this manner, the apparatus 3700 may be used to form a wellbore casing, line a wellbore casing, form a pipeline, line a pipeline, form a structural support member, or repair a wellbore casing, 2 O pipeline or structural support member. In a preferred embodiment, the apparatus 3700 is used to clad at least a portion of the tubular member 3755 onto a preexisting tubular member. T he support member 3705 is preferably coupled to the packer 3710 and the mandre! launcher 3750. The suppol..l, em,ber 3705 preferably comprises a tubular 25 member fabricated from any number of conventional commercially available materials such as, for example, oilfeld country tubular goods, low alloy steel, carbon steel, or stainless steel. The support member 3705 is preferably selected to fit through a preexisting section of wellbore casing 3770. In this manner, the apparatus 3700 may be positioned within the wellbore casing 3770. In a preferred embodiment, the support 30 member 3705 is releasably coupled to the mandrel launcher 3750. In this manner, the
o are a.
support member 3705 may be decoupled from the mandrel launcher 3750 upon the completion of an extrusion operation.
The packer 3710 is coupled to the support member 3705 and the first fluid conduit 3715. The packer 3710 preferably provides a fluid seal between the outside 5 surface ofthe first fluid conduit 3715 and the inside surface ofthe support member 3705. In this manner, the packer 3710 preferably seals off and, in combination with the support member 3705, first fluid conduit 3715, second fluid conduit 3735, and mandrel 3745, defines an annular chamber 3775. The packer 3710 may comprise any number of conventional commercially available packers modified in accordance with 10 the teachings of the present disclosure.
The first fluid conduit 3715 is coupled to the packer 3710 and the annular seal 3730. The first fluid conduit 3715 preferably comprises an annular member fabricated from any number of conventional commercially available materials such as, for example, oilfield country tubular goods, low alloy steel, carbon steel, or stainless steel.
15 In a preferred embodiment, the first fluid conduit 3715 includes one or more fluid inlets 3725 for conveying fluidic materials from the annular fluid passage 3720 into the chamber 3775.
The annular fluid passage 3720 is defined by and positioned between the interior surface of the first fluid conduit 3715 and the interior surface of the second 2 o fluid conduit 3735. The annular fluid passage 3720 is preferably adapted to convey fluidic materials such as cement, water, epoxy, lubricants, and slag mix at operating pressures and flow rates ranging from about O to 9,000 psi and 0 to 3,000 gallons/minute in order to optimally provide operational efficiency.
The fluid inlets 3725 are positioned in an end portion of the first fluid conduit 2 5 3715. The fluid inlets 3725 preferably are adapted to convey fluidic materials such as cement, water, epoxy, lubricants, and slag mix at operating pressures and flow rates ranging from about O to 9,000 psi and 0 to 3,000 gallons/minute in order to optimally provide operational efficiency.
The annular seal 3730 is coupled to the first fluid conduit 3715 and the second 30 fluid conduit 3735. The annular seal 3730 preferably provides a fluid seal between the interior surface of the first fluid conduit 3715 and the exterior surface of the second
o fluid conduit 3735. The annular seal 3730 preferably provides a fluid seal between the interior surface of the first fluid conduit 3715 and the exterior surface of the second fluid conduit 3735 during relative axial motion of the first fluid conduit 3715 and the second fluid conduit 3735. The annular seal 3730 may comprise any number of 5 conventionalcommercially available seals such as, for example, o-rings, polypak seals or metal spring energized seals. In a preferred embodiment, the annular seal 3730 comprises a polypak seal available from Parker Seals in order to optimally provide sealing for axial motion.
The second fluid conduit 3735 is coupled to the annular seal 3730 and the 10 mandrel 3745. The second fluid conduit preferably comprises a tubular member fabricated from any number of conventional commercially available materials such as, for example, coiled tubing, oilfield country tubular goods, low alloy steel, stainless
steel, or low carbon steel. In a preferred embodiment, the second fluid conduit 3735 is adapted to convey fluidic materials such as cement, water, epoxy, lubricants, and slag 15 mix at operating pressures and flow rates ranging from about O to 9,000 psi and O to 3,000 gallons/minute in order to optimally provide operational efficiency.
The fluid passage 3740 is coupled to the second fluid conduit 3735 and the mandrel 3745. In a preferred embodiment, the fluid passage 3740 is adapted to convey fluidic materials such as cement, water, epoxy, lubricants, and slag mix at operating 20 pressures and flow rates ranging from about O to 9,000 psi and O to 3,000 gallons/minute in order to optimally provide operational efficiency.
The mandrel 3745 is coupled to the second fluid conduit 3735 and the mandrel launcher 3750. The mandrel 3745 preferably comprise an annular member having a conic section fabricated from. only number of conventional commercially available 25 materials such as, for example, carbon steel, tool steel, ceramics, or composite materials. In a preferred embodiment, the angle of attack the conic section of the mandrel 3745 ranges from about 10 to 30 degrees in order to optimally expand the mandrel launcher 3750 and tubular member 3755 in the radial direction. In a preferred embodiment, the surface hardness ofthe conic section of the mandrel 3745 ranges 30 from about 50 Rockwell C to 70 Rockwell C. In a particularly preferred embodiment, the surface hardness of the outer surface of the conic section of the mandrel 3745
o c ranges from about 58 Rockwell C to 62 Rockwell C in order to optimally provide high yield strength. In an alternative embodiment, the mandrel 3745 is expandable in order to further optimally augment the radial expansion process.
The mandrel launcher 3750 is coupled to the support member 3705, the 5 mandrel 3745, and the tubular member 3755. The mandrel launcher 3750 preferably comprise a tubular member having a variable cross-section and a reduced wall thickness in order to facilitate the radial expansion process. In a preferred embodiment, the cross-sectional area of the mandrel launcher 3750 at one end is adapted to mate with the mandrel 3745, and at the other end, the cross-sectional area of 10 the mandrel launcher 3750 is adapted to match the cross-sectional area of the tubular member 3755. In a preferred embodiment, the wall thickness of the mandrel launcher 3750 ranges from about 50 to 100 % ofthe wall thickness ofthe tubular member 3755 in order to facilitate the initiation of the radial expansion process.
The mandrel launcher 3750 may be fabricated from any number of 15 conventional commercially available materials such as, for example, oilfield country
tubular goods, low allow steel, stainless steel, or carbon steel. In a preferred embodiment, the mandrel launcher 37SO is fabricated from oilfield country tubular
goods having higher strength but lower wall thickness than the tubular member 3755 in order to optimally match the burst strength of the tubular member 3755. In a preferred 20 embodiment, the mandrel launcher 3750 is removably coupled to the tubular member 3755. In this mariner, the mandrel launcher 3750 may be removed from the wellbore 3780 upon the completion of an extrusion operation.
The tubular member 3755 is coupled to the mandrel launcher, the slips 3760 and the seals 3765. The tubular member 3755 preferably comprises a tubular member 25 fabricated from any number of conventional commercially available materials such as, for example, low alloy steel, carbon steel, stainless steel, or oilfield country tubular
goods. In a preferred embodiment, the tubular member 3755 is fabricated from oilfeld country tubular goods.
The slips 3760 are coupled to the outside surface of the tubular member 3755.
30 The slips 3760 preferably are adapted to couple to the interior walls of a casing, pipeline or other structure upon the radial expansion of the tubular member 3755. In
Othis manner, the slips 3760 provide structural support for the expanded tubular member 3755. The slips 3760 may comprise any number of conventional commercially available slips, modified in accordance with the teachings of the present disclosure.
The seals 3765 are coupled to the outside surface ofthe tubular member 3755.
5 The seals 3765 preferably provide a fluidic seal between the outside surface of the expanded tubular member 3755 and the interior walls of a casing, pipeline or other structure upon the radial expansion of the tubular member 3755. In this manner, the seals 3765 provide a fluidic seal for the expanded tubular member 3755. The seals 3765 may comprise any number of conventional commercially available seals such as, 1 0 for example, lead, rubber, Teflon or epoxy seals modified in accordance with the teachings of the present disclosure. In a preferred embodiment, the seals 3765
comprise seals molded from Stratalock epoxy available from Halliburton Energy Services in Dallas, TX in order to optimally provide a hydraulic seal in the overlapping joint and optimally provide load carrying capacity to withstand the range of typical 1 5 tensile and compressive loads.
During operation of the apparatus 3700, the apparatus 3700 is preferably lowered into a wellbore 3780 having a preexisting section of wellbore casing 3770. In a preferred embodiment, the apparatus 3700 is positioned with at least a portion of the tubular member 3755 overlapping with a portion of the wellbore casing 3770. In this 2 0 manner, the radial expansion of the tubular member 3755 will preferably cause the outside surface of the expanded tubular member 3755 to couple with the inside surface ofthe wellbore casing 3770. In a preferred embodiment, the radial expansion of the tubular member 3755 will also cause the slips 3760 and seals 3765 to engage with the interior surface of the wcllbore casing 377u. in this manner, the expanded tubular 2 5 member 3755 is provided with enhanced structural support by the slips 3760 and an enhanced fluid seal by the seals 3765.
As illustrated in FIG. 23B, after placement of the apparatus 3700 in an overlapping relationship With the welibore casing 3770, a fluidic material 3785 is preferably pumped into the chamber 3775 using the fluid passage 3720 and the inlet 30 passages 3725. In a preferred embodiment, the fluidic material is pumped into the chamber 3775 at operating pressures and flow rates ranging from about 0 to 9,000 psi
o and O to 3,000 gallons/minute in order to optimally provide operational efficiency.
The pumped fluidic material 3785 increase the operating pressure within the chamber 3775. The increased operating pressure in the chamber 3775 then causes the mandrel 3745 to extrude the mandrel launcher 3750 and tubular member 37S5 off of the face of 5 the mandrel 3745. The extrusion ofthe mandrel launcher 3750 and tubular member 3755 off of the face of the mandrel 3745 causes the mandrel launcher 3750 and tubular member 3755 to expand in the radial direction. Continued pumping of the fluidic material 3785 preferably causes the entire length of the tubular member 3755 to expand in the radial direction.
10 In a preferred embodiment, the pumping rate and pressure of the fluidic material 3785 is reduced during the latter stages ofthe extrusion process in order to minimize shock to the apparatus 3700. In a preferred embodiment, the apparatus 3700 includes shock absorbers for absorbing the shock caused by the completion of the extrusion process.
15 In a preferred embodiment, the extrusion process causes the mar drel 3745 to move in an axial direction 3785. During the axial movement of the mandrel, in a preferred embodiment, the fluid passage 3740 conveys fluidic material 3790 displaced by the moving mandrel 3745 out of the wellbore 3780. In this manner, the operational efficiency and speed of the extrusion process is enhanced.
20 In a preferred embodiment, the extrusion process includes the injection of a hardenable fluidic material into the annular region between the tubular member 3755 and the bore hole 3780. In this manner, a hardened sealing layer is provided between the expanded tubular member 3755 and the interior walls of the wellbore 3780.
As illustrated in FIG. 23C, in a preferred embodiment, upon the completion of 25 the extrusion process, the support member 3705, packer 3710, first fluid conduit 3715, annular seal 3730, second fluid conduit 3735, mandrel 3745, and mandrel launcher 3750 are moved from the wellbore 3780.
In an alternative embodiment, the apparatus 3700 is used to repair a preexisting wellbore casing, pipeline, or structural support. In this alternative embodiment, both 30 ends ofthe tubular member 3755 preferably include slips 3760 and seals 3765.
22 7
o In an alternative embodiment, the apparatus 3700 is used to form a tubular structural support for a building or offshore structure.
Referring now to FIGS. 24A, 24B, 24C, 24D, and 24E, an apparatus 3900 for expanding a tubular member will be described. In a preferred embodiment, the 5 apparatus 3900 includes a support member 3905, a mandrel launcher 3910, a mandrel 3915, a first fluid passage 3920, a tubular member 3925, slips 3930, seals 3935, a shoe 3940, and a second fluid passage 3945. In a preferred embodiment, the apparatus 3900 is used to radially expand the mandrel launcher 3910 and tubular member 3925. In this manner, the apparatus 3900 may be used to form a wellbore casing, line a wellbore 1 0 casing, form a pipeline, line a pipeline form a structural support member, or repair a wellbore casing, pipeline or structural support member. In a preferred embodiment, the apparatus 3900 is used to clad at least a portion ofthe tubular member 3925 onto a preexisting structural member.
The support member 3905 is preferably coupled to the mandrel launcher 3910.
1 5 The support member 3905 preferably comprises a tubular member fabricated from any number of conventional commercially available materials such as, for example, oilfield
country tubular goods, low alloy steel, carbon steel, or stainless steel. The support member 3905, the mandrel launcher 3910, the tubular member 3925, and the shoe 3940 are preferably selected to fit through a preexisting section of wellbore casing 2 0 3950. In this manner, the apparatus 3900 may be positioned within the wellbore casing 3970. In a preferred embodiment, the support member 3905 is releasably coupled to the mandrel launcher 3910. In this manner, the support member 3905 may be decoupled from the mandrel launcher 3910 upon the completion of an extrusion operation. 25 The mandrel launcher 3910 is coupled to the support member 3905 and the tubular member 3925. The mandrel launcher 3910 preferably comprise a tubular member having a variable cross-section and a reduced wall thickness in order to facilitate the radial expansion process. In a preferred embodiment, the cross-sectional area of the mandrel launcher 3910 at one end is adapted to mate with the mandrel 30 3915, and at the other end, the cross-sectional area of the mandrel launcher 3910 is adapted to match the cross-sectional area of the tubular member 3925. In a preferred
o embodiment, the wall thickness ofthe mandrel launcher 3910 ranges from about 50 to 100 % of the wall thickness of the tubular member 3925 in order to facilitate the initiation of the radial expansion process.
The mandrel launcher 3910 may be fabricated from any number of 5 conventional commercially available materials such as, for example, oilfield country
tubular goods, low allow steel, stainless steel, or carbon steel. In a preferred embodiment, the mandrel launcher 3910 is fabricated from oilfield country tubular
goods having higher strength but lower wall thickness than the tubular member 3925 in order to optimally match the burst strength of the tubular member 3925. In a preferred 10 embodiment, the mandrel launcher 3910 is removably coupled to the tubular member 3925. In this manner, the mandrel launcher 3910 may be removed from the wellbore 3960 upon the completion of an extrusion operation.
The mandrel 3915 is coupled to the mandrel launcher 3910. The mandrel 3915 preferably comprise an annular member having a conic section fabricated from any 15 number of conventional commercially available materials such as, for example, tool steel, carbon steel, ceramics, or composite materials. In a preferred embodiment, the angle of attack of the conic section of the mandrel 3915 ranges from about 10 to 30 degrees in order to optimally expand the mandrel launcher 3910 and the tubular member 3925 in the radial direction. In a preferred embodiment, the surface hardness 20 of the conic section ofthe mandrel 3915 ranges from about S8 to 62 Rockwell C in order to optimally provide high strength and resist wear and galling. In an alternative embodiment, the mandrel 3915 is expandable in order to further optimally augment the radial expansion process.
The fluid passage 3920 is positioned within the mandrel 3915. The fluid 2 5 passage 3920 is preferably adapted to convey fluidic materials such as cement, water, epoxy, lubricants, and slag mix at operating pressures and flow rates ranging from about O to 9,000 psi and 0 to 3,000 gallons/minute in order to optimally provide operational efficiency. The fluid passage 3920 preferably includes an inlet 3965 adapted to receive a plug, or other similar device. In this manner, the interior chamber 30 3970 above the mandrel 3915 may be Buidicly isolated from the interior chamber 3975 below the mandrel '915.
o The tubular member 3925 is coupled to the mandrel launcher 3910, the slips 3930 and the seals 3935. The tubular member 3925 preferably comprises a tubular member fabricated from any number of conventional commercially available materials such as' for example, low alloy steel, carbon steel, stainless steel, or oilfeld counby 5 tubular goods. In a preferred embodiment, the tubular member 3925 is fabricated from oilfeld country tubular goods.
The slips 3930 are coupled to the outside surface of the tubular member 3925.
The slips 3930 preferably are adapted to couple to the interior walls of a casing, pipeline or other structure upon the radial expansion of the tubular member 3925. In 1 0 this manner, the slips 3930 provide structural support for the expanded tubular member 3925. The slips 3930 may comprise any number of conventional commercially available slips, modified in accordance with the teachings of the present disclosure.
The seals 3935 are coupled to the outside surface of the tubular member 3925.
The seals 3935 preferably provide a fluidic seal between the outside surface of the 1 5 expanded tubular member 3925 and the interior walls of a casing, pipeline or other structure upon the radial expansion of the tubular member 3925. In this manner, the seals 3935 provide a fluidic seal for the expanded tubular member 3925. The seals 3935 may comprise any number of conventional commercially available seals such as, for example, lead, rubber or epoxy. In a preferred embodiment, the seals 3935 2 0 comprise Stratalok epoxy material available from Halliburton Energy Services in order to optimally provide structural support for the typical tensile and compressive loads.
The shoe 3940 is coupled to the tubular member 3925. The shoe 3940 preferably comprises a substantially tubular member having a fluid passage 3945 for conveying fluidic materials Leroy,, the chamber 3975 to the annular region 3970 outside 25 of the apparatus 3900. The shoe 3940 may comprise any number of conventional commercially available shoes modified in accordance with the teachings of the present disclosure.
During operation ofthe apparatus 3900, the apparatus 3900 is preferably lowered into a wellbore 3960 having a preexisting section of wellbore casing 3975. In 30 a preferred embodiment, the apparatus 3900 is positioned with at least a portion of the tubular member 3925 overlapping with a portion of the wellbore casing 3975. In this
c: manner, the radial expansion of the tubular member 3925 will preferably cause the outside surface of the expanded tubular member 3925 to couple with the inside surface of the wellbore casing 3975. In a preferred embodiment, the radial expansion of the tubular member 3925 will also cause the slips 3930 and seals 3935 to engage with the 5 interior surface of the wellbore casing 3975. In this manner, the expanded tubular member 3925 is provided with enhanced structural support by the slips 3930 and an enhanced fluid seal by the seals 3935.
As illustrated in FIG. 24B, after placement of the apparatus 3900 in an overlapping relationship with the wellbore casing 3975, a fluidic material 3980 is 10 preferably pumped into the chamber 3970. The fluidic material 3980 then passes through the fluid passage 3920 into the chamber 3975. The fluidic material 3980 then passes out of the chamber 3975, through the fluid passage 3945, and into the annular region 3970. In a preferred embodiment, the fluidic material 3980 is pumped into the chamber 3970 at operating pressures and flow rates ranging from about 0 to 9,000 psi 15 and 0 to 3,000 gallons/minute in order to optimally provide operational efficiency. In a preferred embodiment, the fluidic material 3980 comprises a hardenable fluidic sealing material in order to form a hardened outer annular member around the expanded tubular member 3925.
As illustrated in FIG. 24C, at some later point in the process, a ball 398S, plug 20 or other similar device, is introduced into the pumped fluidic material 3980. In a preferred embodiment, the ball 3985 mates with and seals off the inlet 3965 of the fluid passage 3920. In this manner, the chamber 3970 is fluidicly isolated from the chamber 3975.
As illustrated in FIG. 24D, after placement of the ball 3985 in the inlet 3965 of 2 5 the fluid passage 3920, a fluidic material 3990 is pumped into the chamber 3970. The fluidic material is preferably pumped into the chamber 3970 at operating pressures and flow rates ranging from about O to 9,000 psi and 0 to 3,000 gallons/minute in order to provide optimal operating efficiency. The fluidic material 3990 may comprise any number of conventional commercially available materials such as, for example, water, 30 drilling mud, cement, epoxy, or slag mix. In a preferred embodiment, the fluidic
o- material 3990 comprises a non-hardenable fluidic material in order to maximize operational efficiency.
Continued pumping of the fluidic material 3990 increases fluidic material 3980 increases the operating pressure within the chamber 3970. The increased operating 5 pressure in the chamber 3970 then causes the mandrel 3915 to extrude the mandrel launcher 3910 and tubular member 3925 off of the conical face of the mandrel 3915.
The extrusion of the mandrel launcher 3910 and tubular member 3925 off of the conical face of the mandrel 3915 causes the mandrel launcher 3910 and tubular member 3925 to expand in the radial direction. Continued pumping of the fluidic 10 material 399() preferably causes the entire length of the tubular member 3925 to expand in the radial direction.
In a preferred embodiment, the pumping rate and pressure of the fluidic material 3990 is reduced during the latter stages of the extrusion process in order to minimize shock to the apparatus 3900. In a preferred embodiment, the apparatus 3900 15 includes shock absorbers for absorbing the shock caused by the completion of the extrusion process. In a preferred embodiment, the extrusion process causes the mandrel 3915 to move in an axial direction 3995.
* As illustrated in FIG. 24E, in a preferred embodiment, upon the completion of the extrusion process, the support member 3905, packer 3910, first fluid conduit 3915, 20 annular seal 3930, second fluid conduit 3935, mandrel 3945, and mandrel launcher 3950 are removed from the wellbore 3980. In a preferred embodiment, the resulting new section of wellbore casing includes the preexisting wellbore casing 3975, the expanded tubular member 3925, the slips 3930, the seals 3935, the shoe 3940, and an outer annealer layer 4000 of hardened fluidic material.
25 In an alternative embodiment, the apparatus 3900 is used to repair a preexisting wellbore casing or pipeline. In this alternative embodiment, both ends of the tubular member 3955 preferably include slips 3960 and seals 3965.
In an alternative embodiment, the apparatus 3900 is used to form a tubular structural support for a building or offshore structure.
30 Referring to FIGS.25 and 26, the optimal relationship between the angle of attack of an expansion mandrel and the minimally required propagation pressure
o during the expansion of a tubular member will now be described. As illustrated in FIG. 25, during the radial expansion of a tubular member 4100 by an expansion mandrel 4105, the expansion mandrel 4105 is displaced in the axial direction. The angle of attack a of the conical surface 4110 of the expansion mandrel 4105 directly 5 affects the required propagation pressure PPR necessary to radially expand the tubular member 4100. Referring to FIG. 26, for typical grades of materials and typical geometries, the propagation pressure PPR is minimized for an angle of attack of approximately 25 degrees. Furthermore, the optimal range of the angle of attack a ranges from about I O to 30 degrees in order to minimize the range of required 10 minimum propagation pressure PPR Referring to FIG. 27, an embodiment of an expandable threaded connection 4300 will now be described. The expandable threaded connection 4300 preferably includes a first tubular member 4305, a second tubular member 4310, a threaded connection 4315, an O-ring groove 4320, and an O-ring 4325.
15 The first tubular member 4305 includes an inside wall 4330 and an outside wall 4335. The first tubular member 4305 preferably comprises an annular member having a substantially constant wall thickness. The second tubular member 4310 includes an inside wall 4340 and an outside wall 4345. The second tubular member 4310 preferably comprises an annular member having a substantially constant wall 20 thickness. T he first and second tubular members, 4305 and 4310, may comprise any number of conventional commercially available members. In a preferred embodiment, the inside and outside diameters of the first and second tubular members, 4305 and 4310, are substantially equal. In this manner, the burst strength of the tubular 25 members, 4305 and 4310, are substantially equal. This minimizes the possibility of a catastrophic failure during the radial expansion process.
The threaded connection 4315 may comprise any number of conventional threaded connections suitable for use with tubular members. In a preferred embodiment, the threaded connection 4315 comprises a pin-and- box threaded 30 connection. In this manner, the assembly of the first tubular member 4305 to the second tubular member 4310 is optimized.
on The O-ring groove 4320 is preferably provided in the threaded portion of the interior wall 4340 of the second tubular member 4310. The O-ring groove 4320 is preferably adapted to receive and support one or more Orings. The volumetric size of the O-ring groove 4320 is preferably selected to permit the O-ring 4325 to expand at 5 least approximately 20% in the axial direction during the radial expansion process. In this manner, deformation of the outer surface 4345 of the second tubular member 4310 during and upon the completion of the radial expansion process is minimized.
The O-ring 4325 is supported by the O-ring groove 4320. The O-ring 4325 optimally ensures that a fluid-tight seal is maintained between the first tubular member 10 4305 and the second tubular member 4310 throughout and upon the completion of the radial expansion process.
Referring to FIG. 28, an alternative embodiment of an expandable threaded connection 4500 will now be described. The expandable threaded connection 4500 includes a first tubular member 4505, a second tubular member 4510, a threaded 15 connection 4515, an O-ring groove 4520' and an O-ring 4525.
The first tubular member 4505 includes an inside wall 4530 and an outside wall 4535. The first tubular member 4305 preferably comprises an annular member having a substantially constant wall thickness. (he second tubular member 4510 includes an inside wall 4540 and an outside wall 4545. The second tubular member 4510 20 preferably comprises an annular member having a substantially constant wall thickness. The first and second tubular members, 4505 and 4510, may comprise an number of conventional commercially available members. In a preferred embodiment, the inside Lund outside diameters of the first and second tubular members, A505 Old 25 4510, are substantially equal. In this manner, the burst strength of the tubular members, 4505 and 4510, are substantially equal. This minimizes the possibility of a catastrophic failure during the radial expansion process.
The threaded connection 4515 may comprise any number of conventional threaded connections suitable for use with tubular members. In a preferred 30 embodiment, the threaded connection 4515 comprises a pin-and- box threaded
Oconnection. In this manner, the assembly of the first tubular member 4505 to the second tubular member 4510 is optimized.
The O-ring groove 4520 is preferably provided in the threaded portion of the interior wall 4540 of the second tubular member 4510 immediately adjacent to an end 5 portion of the threaded connection 4515. In this manner, the sealing effect provided by the O-ring 4525 is optimized. The O-ring groove 4520 is preferably adapted to receive and support one or more O-rings. The volumetric size of the O-ring groove 4520 is preferably selected to permit the O-ring 4525 to expand at least approximately 20% in the axial direction during the radial expansion process. In this manner, deformation of 1 0 the outer surface 4545 of the second tubular member 4510 during and upon the completion of the radial expansion process is minimized.
The O-ring 4525 is supported by the O-ring groove 4520. The O-ring 4525 optimally ensures that a fluid-tight seal is maintained between the first tubular member 4505 and the second tubular member 4510 throughout and upon the completion of the 15 radial expansion process.
Referring to FIG.29, an alternative embodiment of an expandable threaded connection 4700 will now be described. The expandable threaded connection 4700 includes a first tubular member 4705, a second tubular member 4710, a threaded connection 4715, an O-ring groove 4720, a first O-ring 4725, and a second O-ring 2 0 4730.
The first tubular member 4705 includes an inside wall 4735 and an outside wall 4740. The first tubular member 4705 preferably comprises an annular member having a substantially constant wall thickness. The second tubular member 4710 includes an inside wall 4745 and an outside wall 4750. The second tubular member 4710 2 s preferably comprises an annular member having a substantially constant wall thickness. The first and second tubular members, 4705 and 4710, may comprise any number of conventional commercially available members. In a preferred embodiment, the inside and outside diameters of the first and second tubular members, 4705 and 30 4710, are substantially equal. In this manner, the burst strength of the tubular
lo [11.. _ _
members, 4705 and 4710, are substantially equal. This minimizes the possibility of a catastrophic failure during the radial expansion process.
The threaded connection 4715 may comprise any number of conventionathreaded connections suitable for use with tubular members. In a preferred 5 embodiment, the threaded connection 4715 comprises a pin-and- box threaded connection. In this manner, the assembly of the first tubular member 4705 to the second tubular member 4710 is optimized.
The O-ring groove 4720 is preferably provided in the threaded portion of the interior wall 4745 ofthe second tubular member 4710 immediately adjacent to an end 10 portion of the threaded connection 4715. In this manner, the sealing effect provided by the O-rings, 4725 and 4730, is optimized. the O-ring groove 4720 is preferably adapted to receive and support a plurality of O-rings. The volumetric size of the O ring groove 4720 is preferably selected to permit the O-rings, 4725 and 4730, to expand at least approximately 20% in the axial direction during the radial expansion 15 process. In this manner, deformation of the outer surface 4750 of the second tubular member 4710 during and upon the completion of the radial expansion process is .. mmmzed. The O-rings, 4725 and 4730, are supported by the O-ring groove 4720. The pair of O- rings, 4725 and 4730, optimally ensure that a fluid-tight seal is maintained 20 between the first tubular member 4705 and the second tubular member 4710 throughout and upon the completion of the radial expansion process. In particular, the use of a pair of adjacent O-rings provides redundancy in the seal between the first tubular member 4705 and the second tubular member 4710.
Referring to FIG.30, an alternative embodiment of an expandable threaded 25 connection 4900 will now be described. 'the expandable threaded connection 4900 includes a first tubular member 4905, a second tubular member 4910, a threaded connection 4915, a first O-ring groove 4920, a second O-ring grove 4925, a first O ring 4930, and a second O-ring 4935.
The first tubular member 4905 includes an inside wall 4940 and an outside wall 30 4945. The first tubular member 4905 preferably comprises an annular member having a substantially constant wall thickness. The second tubular member 4910 includes
o - - an inside wall 4950 and an outside wall 4955. The second tubular member 4910 preferably comprises an annular member having a substantially constant wall thickness. The first and second tubular members, 4905 and 4910, may comprise any 5 number of conventional commercially available tubular members. In a preferred embodiment, the inside and outside diameters of the first and second tubular members, 4905 and 4910, are substantially equal. In this manner, the burst strength of the tubular members, 4905 and 4910, are substantially equal. This minimizes the possibility of a catastrophic failure during the radial expansion process.
10 The threaded correction 4915 may comprise any number of conventional threaded connections suitable for use with tubular members. In a preferred embodiment, the threaded connection 4915 comprises a pin-and- box threaded connection. In this manner, the assembly of the first tubular member 4905 to the second tubular member 4910 is optimized.
15 The first O-ring groove 4920 is preferably provided in the threaded portion of the interior wall 4950 of the second tubular member 4Y 10 that is separated from an end portion of the threaded connection 4915. In this manner, the sealing effect provided by the O-rings, 4930 and 4935, is optimized. The first O-ring groove 4920 is preferably adapted to receive and support one more O-rings. The volumetric size of the first O 2 0 ring groove 4920 is preferably selected to permit the O-ring 4930 to expand at least approximately 20% in the axial direction during the radial expansion process. In this manner, deformation of the outer surface 4955 ofthe second tubular member 4910 during and upon the completion of the radial expansion process is minimized.
The second O-ring groove 4925 is preferably provided in the threaded portion 2 5 of the interior wall 4950 ofthe second tubular member 4910 that is immediately adjacent to an end portion of the threaded connection 4915. In this manner, the sealing effect provided by the O-rings, 4930 and 4935, is optimized. The second O-ring groove 4925 is preferably adapted to receive and support one more O-rings. The volumetric size of the second O-ring groove 4925 is preferably selected to permit the 3 0 O- ring 4935 to expand at least approximately 20% in the axial direction during the radial expansion process. In this manner, deformation of the outer surface 4955 ot the
o c second tubular member 4910 during and upon the completion ofthe radial expansion process is minimized.
The O-rings, 4930 and 4935, are supported by the O-ring grooves, 4920 and 4925. The use of a pair of O-rings, 4930 and 4935, that are axially separated optimally 5 ensures that a fluid-tight seal is maintained between the first tubular member 4905 and the second tubular member 4910 throughout and upon the completion of the radial expansion process. In particular, the use of a pair of O-rings provides redundancy in the seal between the first tubular member 4905 and the second tubular member 4910.
In a preferred embodiment, the expandable threaded connections 4300, 4500, 10 4700, and/or 4900 are used in combination with one or more of the embodiments illustrated in FIGS. l -24E in order to optimally expand a plurality of tubular members coupled end to end using the expandable threaded connections 4300' 450O, 4700 and/or 4900.
A method of creating a casing in a borehole located in a subterranean formation 15 has been described that includes installing a tubular liner and a mandrel in the borehole. A body of fluidic material is then injected into the borehole. The tubular liner is then radially expanded by extruding the liner off of the mandrel. The injecting preferably includes injecting a hardenable fluidic sealing material into an annular region located between the borehole and the exterior of the tubular liner; and a non 2 0 hardenable fluidic material into an interior region of the tubular liner below the mandrel. The method preferably includes fluidicly isolating the annular region from the interior region before injecting the second quantity of the non hardenable sealing material into the interior region. The injecting the hardenable fluidic sealing material is preferably provided at operating pressures Hind flow rates ranging from about 0 to 25 5000 psi and 0 to 1,500 gallons/mint The injecting ofthe non hardenable fluidic material is preferably provided at operating pressures and flow rates ranging from about 500 to 9000 psi and 40 to 3, 000 gallons/mint The injecting of the non hardenable fluidic material is preferably provided at reduced operating pressures and flow rates during an end portion of the extruding. The non hardenable fluidic material 3 0 is preferably injected below the mandrel. The method preferably includes pressurizing a region of the tubular liner belo\v the mandrel. The region of the tubular liner below 23B
o the mandrel is preferably pressurized to pressures ranging from about 500 to 9,000 psi.
The method preferably includes fluidicly isolating an interior region of the tubular liner from an exterior region of the tubular liner. The method further preferably includes curing the hardenable sealing material, and removing at least a portion of the 5 cured sealing material located within the tubular liner. The method further preferably includes overlapping the tubular liner with an existing wellbore casing. T he method further preferably includes sealing the overlap between the tubular liner and the existing wellbore casing. The method further preferably includes supporting the extruded tubular liner using the overlap with the existing wellbore casing. The method 10 further preferably includes testing the integrity of the seal in the overlap between the tubular liner and the existing wellbore casing. The method further preferably includes removing at least a portion of the hardenable fluidic sealing material within the tubular liner before curing. The method further preferably includes lubricating the surface of the mandrel. The method further preferably includes absorbing shock. The method 15 further preferably includes catching the mandrel upon the completion of the extruding.
An apparatus for creating a casing in a borehole located in a subterranean formation has been described that includes a support member, a mandrel, a tubular member, and a shoe. The support member includes a first fluid passage. The mandrel is coupled to the support member and includes a second fluid passage. The tubular 2 0 member is coupled to the mandrel. The shoe is coupled to the tubular liner and includes a third fluid passage. The first, second and third fluid passages are operably coupled. The support member preferably further includes a pressure relief passage, and a flow control valve coupled to the first fluid passage and the pressure relief passage. The support member further preferably includes a shock absorber. The 2 5 support member preferably includes one or more sealing members adapted to prevent foreign material from entering an interior region of the tubular member. The mandrel is preferably expandable. The tubular member is preferably fabricated from materials selected from the group consisting of Oil field Country Tubular Goods, 13 chromium
steel tubing/casing' and plastic casing. The tubular member preferably has inner and 30 outer diameters ranging from about 3 to 15.5 inches and 3.5 to 16 inches, respectively.
The tubular member preferably has a plastic ield point ranging from about 40000 to
o C- 135,000 psi. The tubular member preferably includes one or more sealing members at an end portion. The tubular member preferably includes one or more pressure relief holes at an end portion. The tubular member preferably includes a catching member at an end portion for slowing down the mandrel. The shoe preferably includes an inlet 5 port coupled to the third fluid passage, the inlet port adapted to receive a plug for blocking the inlet port. The shoe preferably is drillable.
A method of joining a second tubular member to a first tubular member, the first tubular member having an inner diameter greater than an outer diameter of the second tubular member, has been described that includes positioning a mandrel within 10 an interior region of the second tubular member, positioning the first and second tubular members in an overlapping relationship, pressurizing a portion of the interior region of the second tubular member; and extruding the second tubular member off of the mandrel into engagement with the first tubular member. The pressurizing of the portion of the interior region of the second tubular member is preferably provided at 15 operating pressures ranging from about 500 to 9,000 psi. The pressurizing of the portion of the interior region of the second tubular member is preferably provided at reduced operating pressures during a latter portion of the extruding. The method further preferably includes sealing the overlap between the first and second tubular members. The method further preferably includes supporting the extruded first tubular 2 0 member using the overlap with the second tubular member. The method further preferably includes lubricating the surface of the mandrel. The method further preferably includes absorbing shock.
A liner for use in creating a new section of wellbore casing in a subterranean formation adjacent to an already existing section of wellbore casing has been described 2 5 that includes an annular member. The annular member includes one or more sealing members at an end portion of the annular member, and one or more pressure relief passages at an end portion of the annular member.
A wellbore casing has been described that includes a tubular liner and an annular body of a cured fluidic sealing material. The tubular liner is formed by the 3 0 process of extruding the tubular liner off of a mandrel. The tubular liner is preferably formed by the process of placing the tubular liner and mandrel within the w-ellbore, and
o(- - - pressurizing an interior portion of the tubular liner. The annular body of the cured fluidic sealing material is preferably formed by the process of injecting a body of hardenable fluidic sealing material into an annular region external of the tubular liner.
During the pressurizing, the interior portion of the tubular liner is preferably fluidicly 5 isolated from an exterior portion of the tubular liner. The interior portion of the tubular liner is preferably pressurized to pressures ranging from about 500 to 9,000 psi.
The tubular liner preferably overlaps with an existing wellbore casing. T he wellbore casing preferably further includes a seal positioned in the overlap between the tubular liner and the existing wellbore casing. Tubular liner is preferably supported the 10 overlap with the existing wellbore casing.
A method of repairing an existing section of a wellbore casing within a borehole has been described that includes installing a tubular liner and a mandrel within the wellbore casing, injecting a body of a fluidic material into the borehole, pressurizing a portion of an interior region of the tubular liner, and radially expanding 15 the liner in the borehole by extruding the liner off of the mandrel. In a preferred embodiment, the fluidic material is selected from the group consisting of slag mix, cement, drilling mud, and epoxy. In a preferred embodiment, the method further includes fluidicly isolating an interior region of the tubular liner from an exterior region of the tubular liner. In a preferred embodiment, the injecting of the body of 2 0 fluidic material is provided at operating pressures and flow rates ranging from about 500 to 9,000 psi and 40 to 3,000 gallons/mint In a preferred embodiment, the injecting of the body of fluidic material is provided at reduced operating pressures and flow rates during an end portion of the extruding. In a preferred embodiment, the fluidic material is injected below the mandrel. In a preferred embodiment, a region of the 2 5 tubular liner below the mandrel is pressurized. In a preferred embodiment, the region of the tubular liner below the mandrel is pressurized to pressures ranging from about SOD to 9,000 psi. In a preferred embodiment, the method further includes overlapping the tubular liner with the existing wellbore casing. In a preferred embodiment, the method further includes sealing the interface between the tubular liner and the existing 3 0 wellbore casing. In a preferred embodiment, the method further includes supporting the extruded tubular liner using the existing wellbore casing. In a preferred
o embodiment, the method further includes testing the integrity of the seal in the interface between the tubular liner and the existing wellbore casing. In a preferred embodiment, method further includes lubricating the surface of the mandrel. In a preferred embodiment, the method further includes absorbing shock. In a preferred 5 embodiment, the method further includes catching the mandrel upon the completion of the extruding. In a preferred embodiment, the method further includes expanding the mandrel in a radial direction.
A tie-back liner for lining an existing wellbore casing has been described that includes a tubular liner and an annular body of a cured fluidic sealing material. l he 10 tubular liner is formed by the process of extruding the tubular liner off of a mandrel.
The annular body of a cured fluidic sealing material is coupled to the tubular liner. In a preferred embodiment, the tubular liner is formed by the process of placing the tubular liner and mandrel within the wellbore, and pressurizing an interior portion of the tubular liner. In a preferred embodiment, during the pressurizing, the interior 15 portion of the tubular liner is fluidicly isolated from an exterior portion of the tubular liner. In a preferred embodiment, the interior portion of the tubular liner is pressurized at pressures ranging from about 500 to 9,000 psi. In a preferred embodiment, the annular body of a cured fluidic sealing material is formed by the process of injecting a body of hardenable fluidic sealing material into an annular region between the existing 2 0 wellbore casing and the tubular liner. In a preferred embodiment' the tubular liner overlaps with another existing wellbore casing. In a preferred embodiment, the tie back liner further includes a seal positioned in the overlap between the tubular liner and the other existing wellbore casing. In a preferred embodiment, tubular liner is supported by the overlap with the other existing wellbore casing.
2 5 An apparatus for expanding a tubular member has been described that includes a support member, a mandrel, a tubular member, and a shoe. The support member includes a first fluid passage. The mandrel is coupled to the support member. The mandrel includes a second fluid passage operably coupled to the first fluid passage, an interior portion, and an exterior portion. The interior portion of the mandrel is 3 0 drillable. The tubular member is coupled to the mandrel. The shoe is coupled to the tubular member. The shoe includes a third fluid passage operably coupled to the
on second fluid passage, an interior portion, and an exterior portion. The interior portion of the shoe is drillable. Preferably, the interior portion of the mandrel includes a tubular member and a load bearing member. Preferably, the load bearing member comprises a drillable body. Preferably, the interior portion of the shoe includes a 5 tubular member, and a load bearing member. Preferably, the load bearing member comprises a drillable body. Preferably, the exterior portion of the mandrel comprises an expansion cone. Preferably, the expansion cone is fabricated from materials selected from the group consisting of tool steel, titanium, and ceramic. Preferably, the expansion cone has a surface hardness ranging from about 58 to 62 Rockwell C. 10 Preferably at least a portion of the apparatus is drillable.
A wellhead has also been described that includes an outer casing and a plurality of substantially concentric and overlapping inner casings coupled to the outer casing.
Each inner casing is supported by contact pressure between an outer surface of the inner casing and an inner surface of the outer casing. In a preferred embodiment, the 15 outer casing has a yield strength ranging from about 40,000 to 135,000 psi. In a preferred embodiment, the outer casing has a burst strength ranging from about S,OOO to 20,000 psi. In a preferred embodiment, the contact pressure between the inner casings and the outer casing ranges from about 500 to l O,OOO psi. In a preferred embodiment, one or more of the inner casings include one or more sealing members 2 0 that contact with an inner surface of the outer casing. In a preferred embodiment, the sealing members are selected from the group consisting of lead, rubber, Teflon, epoxy, and plastic. In a preferred embodiment, a Christmas tree is coupled to the outer casing.
In a preferred embodiment, a drilling spool is coupled to the outer casing. In a preferred embodiment, at least one of the inner casings is a production casing.
2 5 A wellhead has also been described that includes an outer casing at least partially positioned within a wellbore and a plurality of substantially concentric inner casings coupled to the interior surface of the outer casing by the process of expanding one or more of the inner casings into contact with at least a portion of the interior surface of the outer casing. In a preferred embodiment, the inner casings are expanded 3 o by extruding the inner casings off of a mandrel. In a preferred embodiment, the inner casings are expanded by the process of placing the inner casing and a mandrel within
o - the wellbore; and pressurizing an interior portion of the inner casing. In a preferred embodiment, during the pressurizing, the interior portion of the inner casing is fluidicly isolated from an exterior portion of the inner casing. In a preferred embodiment, the interior portion of the iMer casing is pressurized at pressures ranging 5 from about SOO to 9,000 psi. In a preferred embodiment, one or more seals are positioned in the interface between the inner casings and the outer casing. In a preferred embodiment, the inner casings are supported by their contact with the outer casing. A method of forming a wellhead has also been described that includes drilling a 10 wellbore. An outer casing is positioned at least partially within an upper portion of the wellbore. A first tubular member is positioned within the outer casing. At least a portion of the first tubular member is expanded into contact with an interior surface of the outer casing. second tubular member is positioned within the outer casing and the first tubular member. At least a portion of the second tubular member is expanded 1 5 into contact with an interior portion of the outer casing. In a preferred embodiment, at least a portion of the interior of the first tubular member is pressurized. In a preferred embodiment, at least a portion of the interior of the second tubular member is pressurized. In a preferred embodiment, at least a portion of the interiors of the first and second tubular members are pressurized. In a preferred embodiment, the 2 0 pressurizing of the portion of the interior region of the first tubular member is provided at operating pressures ranging from about 500 to 9,000 psi. In a preferred embodiment, the pressurizing of the portion of the interior region of the second tubular member is provided at operating pressures ranging from about SOO to 9,000 psi. In a preferred embodiment the pressurizing of the potion of the interior r egion of the first 2 5 and second tubular members is provided at operating pressures ranging from about 500 to 9, 000 psi. In a preferred embodiment, the pressurizing of the portion of the interior region of the first tubular member is provided at reduced operating pressures during a latter portion of the expansion. In a preferred embodiment, the pressurizing of the portion of the interior region of the second tubular member is provided at reduced 3 0 operating pressures during a latter portion of the expansion. In a preferred embodiment, the pressurizing of the portion of the interior region of the first and
second tubular members is provided at reduced operating pressures during a latter portion of the expansions. In a preferred embodiment, the contact between the first tubular member and the outer casing is sealed. In a preferred embodiment, the contact between the second tubular member and the outer casing is sealed. In a 5 preferred embodiment, the contact between the first and second tubular members and the outer casing is sealed. In a preferred embodiment, the expanded first tubular member is supported using the contact with the outer casing. In a preferred embodiment, the expanded second tubular member is supported using the contact with the outer casing. In a preferred embodiment, the expanded first and second tubular 10 members are supported using their contacts with the outer casing. In a preferred embodiment, the first and second tubular members are extruded off of a mandrel. In a preferred embodiment, the surface of the mandrel is lubricated. In a preferred embodiment, shock is absorbed. In a preferred embodiment, the mandrel is expanded in a radial direction. In a preferred embodiment, the first and second tubular members 15 are positioned in an overlapping relationship. In a preferred embodiment, an interior region of the first tubular member is fluidicly isolated from an exterior region of the first tubular member. In a preferred embodiment, an interior region of the second tubular member is fluidicly isolated from an exterior region of the second tubular member. In a preferred embodiment, the interior region of the first tubular member is 2 0 fluidicly isolated from the region exterior to the first tubular member by injecting one or more plugs into the interior of the first tubular member. In a preferred embodiment, the interior region of the second tubular member is fluidicly isolated from the region exterior to the second tubular member by injecting one or more plugs into the interior of the second tubular member. In a preferred embodiment, the 2 5 pressurizing of the portion of the interior region of the first tubular member is provided by injecting a fluidic material at operating pressures and flow rates ranging from about 500 to 9,000 psi and 40 to 3,000 gallons/minute. In a preferred embodiment, the pressurizing of the portion of the interior region of the second tubular member is provided by injecting a fluidic material at operating pressures and flow rates ranging 30 from about 500 to 9,000 psi and 40 to 3,000 gallons/minute. In a preferred embodiment, fluidic material is injected beyond the mandrel. In a preferred )fi
embodiment, a region of the tubular members beyond the mandrel is pressurized. In a preferred embodiment, the region of the tubular members beyond the mandrel is pressurized to pressures ranging from about 500 to 9,000 psi. In a preferred embodiment, the first tubular member comprises a production casing. In a preferred 5 embodiment, the contact between the first tubular member and the outer casing is sealed. In a preferred embodiment, the contact between the second tubular member and the outer casing is sealed. In a preferred embodiment, the expanded first tubular member is supported using the outer casing. In a preferred embodiment, the expanded second tubular member is supported using the outer casing. In a preferred 10 embodiment, the integrity of the seal in the contact between the first tubular member and the outer casing is tested. In a preferred embodiment, the integrity of the seal in the contact between the second tubular member and the outer casing is tested. In a preferred embodiment, the mandrel is caught upon the completion of the extruding.
In a preferred embodiment, the mandrel is drilled out. In a preferred embodiment, the 15 mandrel is supported with coiled tubing. In a preferred embodiment, the mandrel is coupled to a drillable shoe.
An apparatus has also been described that includes an outer tubular member, and a plurality of substantially concentric and overlapping inner tubular members coupled to the outer tubular member. Each inner tubular member is supported by 2 0 contact pressure between an outer surface of the inner casing and an inner surface of the outer inner tubular member. In a preferred embodiment, the outer tubular member has a yield strength ranging from about 40,000 to 135,000 psi. In a preferred embodiment, the outer tubular member has a burst strength ranging from about 5,000 to 20, 000 psi. In a preferred embodiment, the contact pressure between the inner 2 5 tubular members and the outer tubular member ranges from about 500 to 10,000 psi.
In a preferred embodiment, one or more of the inner tubular members include one or more sealing members that contact with an inner surface of the outer tubular member.
In a preferred embodiment, the sealing members are selected from the group consisting of rubber, lead, plastic, and epoxy.
3 0 An apparatus has also been described that includes an outer tubular member, and a plurality of substantially concentric inner tubular members coupled to the
interior surface of the outer tubular member by the process of expanding one or more of the inner tubular members into contact with at least a portion of the interior surface of the outer tubular member. In a preferred embodiment, the inner tubular members are expanded by extruding the inner tubular members off of a mandrel. In a preferred 5 embodiment, the inner tubular members are expanded by the process of: placing the inner tubular members and a mandrel within the outer tubular member; and pressurizing an interior portion of the inner casing. In a preferred embodiment, during the pressurizing, the interior portion of the inner tubular member is fluidicly isolated from an exterior portion of the inner tubular member. In a preferred embodiment, the 10 interior portion of the inner tubular member is pressurized at pressures ranging from about SOD to9,000 psi. In a preferred embodiment, the apparatus further includes one or more seals positioned in the interface between the inner tubular members and the outer tubular member. In a preferred embodiment, the inner tubular members are supported by their contact with the outer tubular member.
15 A wellbore casing has also been described that includes a first tubular member, and a second tubular member coupled to the first tubular member in an overlapping relationship. The inner diameter of the first tubular member is substantially equal to the inner diameter of the second tubular member. In a preferred embodiment, the first tubular member includes a first thin wall section, wherein the second tubular member 2 0 includes a second thin wall section, and wherein the first thin wall section is coupled to the second thin wall section. In a preferred embodiment, first and second thin wall sections are deformed. In a preferred embodiment, the first tubular member includes a first compressible member coupled to the first thin wall section, and wherein the second tubular member includes a second compressible member coupled to the second 2 5 thin wall section. In a preferred embodiment, the first thin wall section and the first compressible member are coupled to the second thin wall section and the second compressible member. In a preferred embodiment, the first and second thin wall sections and the first and second compressible members are deformed.
A wellbore casing has also been described that includes a tubular member 30 including at least one thin wall section and a thick wall section, and z47
a compressible annular member coupled to each thin wall section. In a preferred embodiment, the compressible annular member is fabricated from materials selected from the group consisting of rubber, plastic, metal and epoxy. In a preferred embodiment, the wall thickness of the thin wall section ranges from about SO to 100 % 5 of the wall thickness of the thick wall section. In a preferred embodiment, the length of the thin wall section ranges from about 120 to 2400 inches. In a preferred embodiment, the compressible annular member is positioned along the thin wall section. In a preferred embodiment, the compressible annular member is positioned along the thin and thick wall sections. In a preferred embodiment, the tubular member 10 is fabricated from materials selected from the group consisting of oilfield country
tubular goods, stainless steel, low alloy steel, carbon steel, automotive grade steel, plastics, fiberglass, high strength and/or deformable materials. In a preferred embodiment, the wellbore casing includes a first thin wall at a first end of the casing, and a second thin wall at a second end of the casing.
15 A method of creating a casing in a borehole located in a subterranean formation has also been described that includes supporting a tubular liner and a mandrel in the borehole using a support member, injecting fluidic material into the borehole, pressurizing an interior region of the mandrel, displacing a portion of the mandrel relative to the support member, and radially expanding the tubular liner. In a preferred 2 0 embodiment, the injecting includes injecting hardenable fluidic sealing material into an annular region located between the borehole and the exterior of the tubular liner, and injecting non hardenable fluidic material into an interior region of the mandrel. In a preferred embodiment, the method further includes fluidicly isolating the annular region from the interior region before injecting the non hardenable fluidic material into 2 5 the interior region of the mandrel. In a preferred embodiment, the injecting of the hardenable fluidic sealing material is provided at operating pressures and flow rates ranging from about O to S,OOO psi and O to 1,500 gallons/mint In a preferred embodiment, the injecting of the non hardenable fluidic material is provided at operating pressures and flow rates ranging from about SOO to 9,000 psi and 40 to 3,000 3 0 gallons/mint In a preferred embodiment, the injecting of the non hardenable fluidic material is provided at reduced operating pressures and flow rates during an end
portion of the radial expansion. In a preferred embodiment, the fluidic material is injected into one or more pressure chambers. In a preferred embodiment, the one or more pressure chambers are pressurized. In a preferred embodiment, the pressure chambers are pressurized to pressures ranging from about 500 to 9,000 psi. In a 5 preferred embodiment, the method further includes fluidicly isolating an interior region of the mandrel from an exterior region of the mandrel. In a preferred embodiment, the interior region of the mandrel is isolated from the region exterior to the mandrel by inserting one or more plugs into the injected fluidic material. In a preferred embodiment, the method further includes curing at least a portion of the fluidic 10 material, and removing at least a portion of the cured fluidic material located within the tubular liner. In a preferred embodiment, the method further includes overlapping the tubular liner with an existing wellbore casing. In a preferred embodiment, the method further includes sealing the overlap between the tubular liner and the existing wellbore casing. In a preferred embodiment, the method further includes supporting 15 the extruded tubular liner using the overlap with the existing wellbore casing. In a preferred embodiment, the method further includes testing the integrity of the seal in the overlap between the tubular liner and the existing wellbore casing. In a preferred embodiment, the method further includes removing at least a portion of the hardenable fluidic sealing material within the tubular liner before curing. In a preferred 2 0 embodiment, the method further includes lubricating the surface of the mandrel. In a preferred embodiment, the method further includes absorbing shock. In a preferred embodiment, the method farther includes catching the mandrel upon the completion of the extruding. In a preferred embodiment, the method further includes drilling out the mandrel. In a preferred embodiment, the method further includes supporting the 2 5 mandrel with coiled tubing. In a preferred embodiment, the mandrel reciprocates. In a preferred embodiment, the mandrel is displaced in a first direction during the pressurization of the interior region of the mandrel, and the mandrel is displaced in a second direction during a de-pressurization of the interior region of the mandrel. In a preferred embodiment, the tubular liner is maintained in a substantially stationary 3 0 position during the pressurization of the interior region of the mandrel. In a preferred
embodiment, the tubular liner is supported by the mandrel during a depressurization of the interior region of the mandrel.
A wellbore casing has also been described that includes a first tubular member having a first inside diameter, and a second tubular member having a second inside 5 diameter substantially equal to the first inside diameter coupled to the first tubular member in an overlapping relationship. The first and second tubular members are coupled by the process of deforming a portion of the second tubular member into contact with a portion of the first tubular member. In a preferred embodiment, the second tubular member is deformed by the process of placing the first and second 10 tubular members in an overlapping relation ship, radially expanding at least a portion of the first tubular member, and radially expanding the second tubular member. In a preferred embodiment, the second tubular member is radially expanded by the process of supporting the second tubular member and a mandrel within the wellbore using a support member, injecting a fluidic material into the wellbore, pressurizing an interior 15 region of the mandrel, and displacing a portion of the mandrel relative to the support member. In a preferred embodiment, the injecting includes injecting hardenable fluidic sealing material into an annular region located between the borehole and the exterior of the second liner, and injecting non hardenable fluidic material into an interior region of the mandrel. In a preferred embodiment' the wellbore casing further 2 0 includes fluidicly isolating the annular region from the interior region of the mandrel before injecting the non hardenable fluidic material into the interior region of the mandrel. In a preferred embodiment, the injecting of the hardenable fluidic sealing material is provided at operating pressures and flow rates ranging from about O to S,OOO psi and O to 1,SOO gallons/mint In a preferred embodiment, the injecting of the 2 5 non hardenable fluidic material is provided at operating pressures and flow rates ranging from about 500 to 9,000 psi and 40 to 3,000 gallons/mint In a preferred embodiment, the injecting of the non hardenable fluidic material is provided at reduced operating pressures and flow rates during an end portion of the radial expansion. In a preferred embodiment, the fluidic material is injected into one or more pressure 30 chambers. In a preferred embodiment, one or more pressure chambers are pressurized.
In a preferred embodirr.er.t, the pressure chambers are pressurized to pressures ranging
( from about SOD to 9,000 psi. In a preferred embodiment, the wellbore casing further includes fluidicly isolating an interior region of the mandrel from an exterior region of the mandrel. In a preferred embodiment, the interior region of the mandrel is isolated from the region exterior to the mandrel by inserting one or more plugs into the injected 5 fluidic material. In a preferred embodiment, the wellbore casing further includes curing at least a portion of the fluidic material, and removing at least a portion of the cured fluidic material located within the second tubular liner. In a preferred embodiment, the wellbore casing further includes sealing the overlap between the first and second tubular liners. In a preferred embodiment, the wellbore casing further 10 includes supporting the second tubular liner using the overlap with the first tubular liner. In a preferred embodiment, the wellbore casing further includes testing the integrity of the seal in the overlap between the first and second tubular liners. In a preferred embodiment, the wellbore casing further includes removing at least a portion of the hardenable fluidic sealing material within the second tubular liner before curing.
15 In a preferred embodiment, the wellbore casing further includes lubricating the surface of the mandrel. In a preferred embodiment, the wellbore casing further includes absorbing shock. In a preferred embodiment, the wellbore casing further includes catching the mandrel upon the completion of the radial expansion. In a preferred embodiment, the wellbore casing further includes drilling out the mandrel. In a 2 0 preferred embodiment, the wellbore casing further include supporting the mandrel with coiled tubing. In a preferred embodiment, the mandrel reciprocates. In a preferred embodiment, the mandrel is displaced in a first direction during the pressurization of the interior region of the mandrel; and wherein the mandrel is displaced in a second direction during a de-pressurization of the interior region of the mandrel. In a 2 5 preferred embodiment, the second tubular liner is maintained in a substantially stationary position during the pressurization of the interior region of the mandrel. In a preferred embodiment, the second tubular liner is supported by the mandrel during a de-pressurization of the interior region of the mandrel.
An apparatus for expanding a tubular member has also been described that 3 0 includes a support member including a fluid passage, a mandrel movably coupled to the support member including an expansion cone. at least one pressure chamber
r defined by and positioned between the support member and mandrel fluidicly coupled to the first fluid passage, and one or more releasable supports coupled to the support member adapted to support the tubular member. In a preferred embodiment, the fluid passage includes a throat passage having a reduced inner diameter. In a preferred 5 embodiment, the mandrel includes one or more annular pistons. In a preferred embodiment, the apparatus includes a plurality of pressure chambers. In a preferred embodiment, the pressure chambers are at least partially defined by annular pistons. In a preferred embodiment, the releasable supports are positioned below the mandrel. In a preferred embodiment, the releasable supports are positioned above the mandrel. In 10 a preferred embodiment, the releasable supports comprise hydraulic slips. In a preferred embodiment, the releasable supports comprise mechanical slips. In a preferred embodiment, the releasable supports comprise drag blocks. In a preferred embodiment, the mandrel includes one or more annular pistons, and an expansion cone coupled to the annular pistons. In a preferred embodiment, one or more of the annular 15 pistons include an expansion cone. In a preferred embodiment, the pressure chambers comprise annular pressure chambers.
An apparatus has also been described that includes one or more solid tubular members, each solid tubular member including one or more external seals, one or more slotted tubular members coupled to the solid tubular members, and a shoe coupled to 2 0 one of the slotted tubular members. In a preferred embodiment, the apparatus further includes one or more intermediate solid tubular members coupled to and interleaved among the slotted tubular members, each intermediate solid tubular member including one or more external seals. In a preferred embodiment, the apparatus further includes one or more valve members. In a preferred embodiment, one or more of the 2 5 intermediate solid tubular members include one or more valve members.
A method of joining a second tubular member to a first tubular member, the first tubular member having an inner diameter greater than an outer diameter of the second tubular member, has also been described that includes positioning a mandrel within an interior region of the second tubular member, pressurizing a portion of the 3 0 interior region of the mandrel, displacing the mandrel relative to the second tubular member, and extruding at least a potion of the second tubular member off of the
mandrel into engagement with the first tubular member. In a preferred embodiment, the pressurizing of the portion of the interior region of the mandrel is provided at operating pressures ranging from about 500 to 9, 000 psi. In a preferred embodiment' the pressurizing of the portion of the interior region of the mandrel is provided at 5 reduced operating pressures during a latter portion of the extruding. In a preferred embodiment, the method further includes sealing the interface between the first and second tubular members. In a preferred embodiment, the method further includes supporting the extruded second tubular member using the interface with the first tubular member. In a preferred embodiment, the method further includes lubricating 10 the surface of the mandrel. In a preferred embodiment, the method further includes absorbing shock. In a preferred embodiment, the method further includes positioning the first and second tubular members in an overlapping relationship. In a preferred embodiment, the method further includes fluidicly isolating an interior region of the mandrel an exterior region of the mandrel. In a preferred embodiment, the interior 15 region of the mandrel is fluidicly isolated from the region exterior to the mandrel by injecting one or more plugs into the interior of the mandrel. In a preferred embodiment, the pressurizing of the portion of the interior region of the mandrel is provided by injecting a fluidic material at operating pressures and flow rates ranging from about SOO to 9,000 psi and 40 to 3,000 gallons/minute. In a preferred 2 0 embodiment, the method further includes injecting fluidic material beyond the mandrel. In a preferred embodiment, one or more pressure chambers defined by the mandrel are pressurized In a preferred embodiment, the pressure chambers are pressurized to pressures ranging from about 500 to 9,000 psi. In a preferred embodiment, the first tubular member comprises an existing section of a wellbore. In 2 5 a preferred embodiment, the method further includes sealing the interface between the first and second tubular members. In a preferred embodiment, the method further includes supporting the extruded second tubular member using the first tubular member. In a preferred embodiment, the method further includes testing the integrity ofthe seal in the interface between the first tubular member and the second tubular 3 0 member. In a preferred embodiment, the method further includes catching the mandrel upon the completion of the extruding. In a preferred embodiment, the method further
- - - v v includes drilling out the mandrel. In a preferred embodiment, the method further include supporting the mandrel with coiled tubing. In a preferred embodiment, the method further includes coupling the mandrel to a drillable shoe. In a preferred embodiment, the mandrel is displaced in the longitudinal direction. In a preferred S embodiment, the mandrel is displaced in a first direction during the pressurization and in a second direction during a de-pressurization.
An apparatus has also been described that includes one or more primary sold tubulars, each primary solid tubular including one or more external annular seals, n slotted tubulars coupled to the primary solid tubulars, n-1 intermediate solid tubulars 10 coupled to and interleaved among the slotted tubulars, each intermediate solid tubular including one or more external annular seals, and a shoe coupled to one of the slotted tubulars. A method of isolating a first subterranean zone from a second subterranean zone in a wellbore has also been described that includes positioning one or more 15 primary solid tubulars within the wellbore, the primary solid tubulars traversing the first subterranean zone, positioning one or more slotted tubulars within the wellbore, the slotted tubulars traversing the second subterranean zone, fluidicly coupling the slotted tubulars and the solid tubulars, and preventing the passage of fluids from the first subterranean zone to the second subterranean zone within the wellbore external to O the solid and slotted tubulars.
A method of extracting materials from a producing subterranean zone in a wellbore, at least a portion of the wellbore including a casing, has also been described that includes positioning one or more primary solid tubulars within the wellbore, fluidicly coupling the primary solid tubulars with the casing, positioning one or more 2 5 slotted tubulars within the wellbore, the slotted tubulars traversing the producing subterranean zone, fluidicly coupling the slotted tubulars with the solid tubulars, fluidicly isolating the producing subterranean zone from at least one other subterranean zone within the wellbore, and fluidicly coupling at least one of the slotted tubulars from the producing subterranean zone. In a preferred embodiment, the method further 30 includes controllably fluidicly decoupling at least one ofthe slotted tubulars from at least one other of the slotted tubulars.
A method of creating a casing in a borehole while also drilling the borehole also has been described that includes installing a tubular liner, a mandrel, and a drilling assembly in the borehole. A fluidic material is injected within the tubular liner, mandrel and drilling assembly. At least a portion of the tubular liner is radially 5 expanded while the borehole is drilled using the drilling assembly. In a preferred embodiment, the injecting includes injecting the fluidic material within an expandable chamber. In a preferred embodiment, the injecting includes injecting hardenable fluidic sealing material into an annular region located between the borehole and the exterior of the tubular liner. In a preferred embodiment, the injecting of the hardenable 10 fluidic sealing material is provided at operating pressures and flow rates ranging from about O to 5,000 psi and O to 1,500 gallons/mint In a preferred embodiment, the injecting of the fluidic material is provided at operating pressures and flow rates ranging from about 500 to 9,000 psi and 40 to 3,000 gallons/mint In a preferred embodiment, the injecting of the fluidic material is provided at reduced operating 15 pressures and flow rates during an end portion of the radial expansion. In a preferred embodiment, the method further includes curing at least a portion of the fluidic material; and removing at least a portion of the cured fluidic material located within the tubular liner. In a preferred embodiment, the method further includes overlapping the tubular liner with an existing wellbore casing. In a preferred embodiment, the 2 0 method further includes sealing the overlap between the tubular liner and the existing wellbore casing. In a preferred embodiment, the method further includes supporting the extruded tubular liner using the overlap with the existing wellbore casing. In a preferred embodiment, the method further includes testing the integrity of the seal in the overlap between the tubular liner and the existing wellbore casing. In a preferred 2 5 embodiment, the method further includes lubricating the surface of the mandrel. In a preferred embodiment, the method further includes absorbing shock. In a preferred embodiment, the method further includes catching the mandrel upon the completion of the extruding. In a preferred embodiment, the method further includes expanding the mandrel in a radial direction. In a preferred embodiment, the method further includes 3 0 drilling out the mandrel. In a preferred embodiment, the method further includes supporting the mandrel with coiled tubing. In a preferred embodiment, the wall
11. thickness of the tubular member is variable. In a preferred embodiment, the mandrel is coupled to a drillable shoe.
An apparatus has also been described that includes a support member, the support member including a first fluid passage; a mandrel coupled to the support 5 member, the mandrel including: a second fluid passage; a tubular member coupled to the mandrel; and a shoe coupled to the tubular liner, the shoe including a third fluid passage; and a drilling assembly coupled to the shoe; wherein the first, second and third fluid passages and the drilling assembly are operably coupled. In a preferred embodiment, the support member further includes: a pressure relief passage; and a 10 flow control valve coupled to the first fluid passage and the pressure relief passage. In a preferred embodiment, the support member further includes a shock absorber. In a preferred embodiment, the support member includes one or more sealing members adapted to prevent foreign material from entering an interior region of the tubular member. In a preferred embodiment, the support member includes one or more 15 stabilizers. In a preferred embodiment, the mandrel is expandable. In a preferred embodiment, the tubular member is fabricated from materials selected from the group consisting of Oilfield Country Tubular Goods, automotive grade steel, plastic and
chromium steel. In a preferred embodiment, the tubular member has inner and outer diameters ranging from about 0.75 to 47 inches and 1.05 to 48 inches, respectively. In 2 0 a preferred embodiment, the tubular member has a plastic yield point ranging from about 40,000 to 135,000 psi. In a preferred embodiment, the tubular member includes one or more sealing members at an end portion. In a preferred embodiment, the tubular member includes one or more pressure relief holes at an end portion. In a preferred embodiment, the tubular member includes a catching member at an end 2 5 portion for slowing down movement of the mandrel. In a preferred embodiment, the support member comprises coiled tubing. In a preferred embodiment, at least a portion of the mandrel and shoe are drillable. In a preferred embodiment, the wall thickness of the tubular member in an area adjacent to the mandrel is less than the wall thickness of the tubular member in an area that is not adjacent to the mandrel. In a preferred 3 0 embodiment, the apparatus further includes an expandable chamber. In a preferred
embodiment, the expandable chamber is approximately cylindrical. In a preferred embodiment, the expandable chamber is approximately annular.
A method of forming an underground pipeline within an underground tunnel including at least a first tubular member and a second tubular member, the first tubular 5 member having an inner diameter greater than an outer diameter of the second tubular member, has also been described that includes positioning the first tubular member within the tunnel; positioning the second tubular member within the tunnel in an overlapping relationship with the first tubular member; positioning a mandrel and a drilling assembly within an interior region of the second tubular member; injecting a 10 fluidic material within the mandrel, drilling assembly and the second tubular member; extruding at least a portion of the second tubular member off of the mandrel into engagement with the first tubular member; and drilling the tunnel. In a preferred embodiment, the injecting of the fluidic material is provided at operating pressures ranging from about SOO to 9,000 psi. In a preferred embodiment, the injecting of the 15 fluidic material is provided at reduced operating pressures during a latter portion of the extruding. In a preferred embodiment, the method further includes sealing the interface between the first and second tubular members. In a preferred embodiment, the method further includes supporting the extruded second tubular member using the interface with the first tubular member. In a preferred embodiment, the method further 2 0 includes lubricating the surface of the mandrel. In a preferred embodiment, the method further includes absorbing shock. In a preferred embodiment, the method further includes expanding the mandrel in a radial direction. In a preferred embodiment, the method further includes sealing the interface between the first and second tubular members. In a preferred embodiment, the method further includes 2 5 supporting the extruded second tubular member using the first tubular member. In a preferred embodiment, the method further includes testing the integrity of the seal in the interface between the first tubular member and the second tubular member. In a preferred embodiment, the method further includes catching the mandrel upon the completion of the extruding. In a preferred embodiment, the method further includes 3 0 drilling out the mandrel. In a preferred embodiment, the method further includes supporting the mandrel with coiled tubing. In a preferred embodiment. the method
further includes coupling the mandrel to a drillable shoe. In a preferred embodiment, the fluidic material is injected into an expandable chamber. In a preferred embodiment, the expandable chamber is substantially cylindrical. In a preferred embodiment, the expandable chamber is substantially annular. An apparatus has also 5 been described that includes a wellbore, the wellbore formed by the process of drilling the wellbore; and a tubular liner positioned within the wellbore, the tubular liner formed by the process of extruding the tubular liner off of a mandrel while drilling the wellbore. In a preferred embodiment, the tubular liner is formed by the process of: placing the tubular liner and mandrel within the wellbore; arid pressurizing an interior 10 portion of the tubular liner. In a preferred embodiment, the interior portion of the tubular liner is pressurized at pressures ranging from about SOO to 9,000 psi. In a preferred embodiment, the tubular liner is formed by the process of: placing the tubular liner and mandrel within the wellbore; and pressurizing an interior portion of the mandrel. In a preferred embodiment, the interior portion of the mandrel is pressurized 15 at pressures ranging from about SOO to 9,000 psi. In a preferred embodiment, the apparatus further includes an annular body of a cured fluidic materialcoupled to the tubular liner. In a preferred embodiment, the annular body of a cured fluidic sealing material is formed by the process of: injecting a body of hardenable fluidic sealing material into an annular region external of the tubular liner. In a preferred 2 0 embodiment, the tubular liner overlaps with an existing wellbore casing. In a preferred embodiment, the apparatus further includes a seal positioned in the overlap between the tubular liner and the existing wellbore casing. In a preferred embodiment, the tubular liner is supported by the overlap with the existing wellbore casing. In a preferred embodiment, the process of extruding the tubular liner includes the 2 S pressurizing of an expandable chamber. In a preferred embodiment, the expandable chamber is substantially cylindrical. In a preferred embodiment, the expandable chamber is substantially annular.
A method of forming a wellbore casing in a wellbore has also been described that includes drilling out the wellbore while forming the wellbore casing. In a 3 0 preferred embodiment, the forming includes: expanding a tubular member in the radial direction. In a preferred embodimer,t, the expanding includes: displacing a mandrel
relative to the tubular member. In a preferred embodiment, the displacing includes: expanding an expandable chamber. In a preferred embodiment, the expandable chamber comprises a cylindrical chamber. In a preferred embodiment, the expandable chamber comprises an annular chamber.
5 A method of expanding a tubular member has also been described that includes placing a mandrel within the tubular member, pressurizing an annular region within the tubular member, and displacing the mandrel with respect to the tubular member. In a preferred embodiment, the method further includes removing fluids within the tubular member that are displaced by the displacement of the mandrel. In a preferred 10 embodiment, the removed fluids pass inside the annular region. In a preferred embodiment, the volume of the annular region increases. In a preferred embodiment, the method further includes sealing off the annular region. In a preferred embodiment, sealing off the annular region includes sealing a stationary member and sealing a non stationary member. In a preferred embodiment, the method further includes conveying 15 fluids in opposite directions. In a preferred embodiment, the method further includes conveying a pressurized fluid and a non-pressurized fluid in opposite directions. In a preferred embodiment, the pressurizing is provided at operating pressures ranging from about O to 9,000 psi. In a preferred embodiment, the pressurizing is provided at flow rates ranging from about O to 3,000 gallons/minute.
2 0 A method of coupling a tubular member to preexisting structure has also been described that includes positioning the tubular member in an overlapping relationship to the preexisting structure, placing a mandrel within the tubular member, pressurizing an annular region within the tubular member, and displacing the mandrel with respect to the tubular member. In a preferred embodiment, the method further includes 2 5 removing fluids within the tubular member that are displaced by the displacement of the mandrel. In a preferred embodiment, the removed fluids pass inside the annular region. In a preferred embodiment, the volume of the annular region increases. In a preferred embodiment, the method further includes sealing off the annular region. In a preferred embodiment, sealing off the annular region includes sealing a stationary 3 0 member and sealing a non-stationary member. In a preferred embodiment, the method further includes conveying fluids in opposite directions. In a preferred embodiment, o59
the method further includes conveying a pressurized fluid and a nonpressurized fluid in opposite directions. In a preferred embodiment, the pressurizing is provided at operating pressures ranging from about O to 9, 000 psi. In a preferred embodiment, the pressurizing is provided at flow rates ranging from about O to 3,000 gallons/minute.
5 A method of repairing a defect in a preexisting structure using a tubular member has also been described that includes positioning the tubular member in an overlapping relationship to the defect in the preexisting structure, placing a mandrel within the tubular member, pressurizing an annular region within the tubular member, and displacing the mandrel with respect to the tubular member. In a preferred 10 embodiment, the method further includes removing fluids within the tubular member that are displaced by the displacement of the mandrel. In a preferred embodiment, the removed fluids pass inside the annular region. In a preferred embodiment, the volume of the annular region increases. In a preferred embodiment, the method further includes sealing off the annular region. In a preferred embodiment, sealing off the 15 annular region includes sealing a stationary member and sealing a non-stationary member. In a preferred embodiment, the method further includes conveying fluids in opposite directions. In a preferred embodiment, the method further includes conveying a pressurized fluid and a non-pressurized fluid in opposite directions. In a preferred embodiment, the pressurizing is provided at operating pressures ranging from about O 2 0 to 9,000 psi. In a preferred embodiment, the pressurizing is provided at flow rates ranging from about O to 3,000 gallons/minute. In a preferred embodiment, the method further includes sealing the interface between the preexisting structure and the tubular member at ends of the tubular member.
An apparatus for radially expanding a tubular member has also been described 2 5 that includes a first tubular member, a second tubular member positioned within the first tubular member, a third tubular member movably coupled to and positioned within the second tubular member, a first annular sealing member for sealing an interface between the first and second tubular members, a second annular sealing member for sealing an interface between the second and third tubular members, and a 3 0 mandrel positioned within the first tubular member and coupled to an end of the third tabular member. In a preferred embodiment, the apparatus further includes an annular
t -) chamber defined by the first tubular member, the second tubular member, the third tubular member, the first annular sealing member, the second annular sealing member, and the mandrel. In a preferred embodiment, the apparatus further includes an annular passage defined by the second tubular member and the third tubular member. In a 5 preferred embodiment, the apparatus further includes a fluid passage contained within the third tubular member and the mandrel. In a preferred embodiment, the apparatus further includes one or more sealing members coupled to an exterior surface of the first tubular member. In a preferred embodiment, the apparatus further includes an annular chamber defined by the first tubular member, the second tubular member, the third 10 tubular member, the first annular sealing member, the second annular sealing member, and the mandrel, and annular passage defined by the second tubular member and the third tubular member. In a preferred embodiment, the annular chamber and the annular passage are f uidicly coupled. In a preferred embodiment, the apparatus further includes one or more slips coupled to the exterior surface of the first tubular 15 member. In a preferred embodiment, the mandrel includes a conical surface. In a preferred embodiment, the angle of attack of the conical surface ranges from about 10 to 30 degrees. In a preferred embodiment, the conical surface has a surface hardness ranging from about 58 to 62 Rockwell C. An apparatus has also been described that includes a tubular member, a piston 2 0 adapted to expand the diameter of the tubular member positioned within the tubular member, the piston including a passage for conveying fluids out of the tubular member, and an annular chamber defined by the piston and tubular member. In a preferred embodiment, the piston includes a conical surface. In a preferred embodiment, the angle of attack ofthe conical surface ranges from about 10 to 30 2 5 degrees. In a preferred embodiment, the conical surface has a surface hardness ranging from about 58 to 62 Rockwell C. In a preferred embodiment, the tubular member includes one or more sealing members coupled to the exterior surface of the tubular member. A wellbore casing has also been described that includes a first tubular member 30 and a second tubular member coupled to the first tubular member. The second tubular member is coupled to the f rst tubular member by the process of positioning the second 6 1
(a - tubular member in an overlapping relationship to the first tubular member, placing a mandrel within the second tubular member, pressurizing an annular region within the second tubular member, and displacing the mandrel with respect to the second tubular member. In a preferred embodiment, the wellbore casing further includes removing 5 fluids within the second tubular member that are displaced by the displacement of the mandrel. In a preferred embodiment, the removed fluids pass inside the annular region. In a preferred embodiment, the volume of the annular region increases. In a preferred embodiment, the wellbore casing further includes sealing off the annular region. In a preferred embodiment, sealing off the annular region includes sealing a 10 stationary member and sealing a non-stationary member. In a preferred embodiment, the wellbore casing further including conveying fluids in opposite directions. In a preferred embodiment, the wellbore casing further includes conveying a pressurized fluid and a non-pressurized fluid in opposite directions. In a preferred embodiment, the pressurizing is provided at operating pressures ranging from about O to 9,000 psi.
15 In a preferred embodiment, the pressurizing is provided at flovv rates ranging from about O to 3000 gallons/minute.
An apparatus has also been described that includes a preexisting structure and a tubular member coupled to the preexisting structure. The tubular member is coupled to the preexisting structure by the process of: positioning the tubular member in an 2 0 overlapping relationship to the preexisting structure, placing a mandrel within the tubular member, pressurizing an annular region within the tubular member, and displacing the mandrel with respect to the tubular member. In a preferred embodiment, the apparatus further includes removing fluids within the tubular member that are displaced by the displacement of the mandrel. In a preferred 2 5 embodiment, the removed fluids pass inside the annular region. In a preferred embodiment, the volume of the annular region increases. In a preferred embodiment, the apparatus further includes sealing off the annular region. In a preferred embodiment, sealing off the annular region includes sealing a stationary member and sealing a non-stationary member. In a preferred embodiment, the apparatus further 3 0 includes conveying fluids in opposite directions. In a preferred embodiment, the apparatus further includes conveying a pressurized fluid and a non-pressurized fluid in -,
opposite directions. In a preferred embodiment, the pressurizing is provided at operating pressures ranging from about O to 9,000 psi. In a preferred embodiment, the pressurizing is provided at flow rates ranging from about O to 3,000 gallons/minute.
An apparatus has also been described that includes a preexisting structure s having a defective portion and a tubular member coupled to the defective portion of the preexisting structure. The tubular member is coupled to the defective portion of the preexisting structure by the process of: positioning the tubular member in an overlapping relationship to the defect in the preexisting structure, placing a mandrel within the tubular member, pressurizing an annular region within the tubular member, 10 and displacing the mandrel with respect to the tubular member. In a preferred embodiment, the apparatus further includes removing fluids within the tubular member that are displaced by the displacement of the mandrel. In a preferred embodiment, the removed fluids pass inside the annular region. In a preferred embodiment, the volume of the annular region increases. In a preferred embodiment, the apparatus further 15 includes sealing off the annular region. In a preferred embodiment, sealing off the annular region includes sealing a stationary member and sealing a non-stationary member. In a preferred embodiment, the apparatus further includes conveying fluids in opposite directions. In a preferred embodiment, the apparatus further includes conveying a pressurized fluid and a non-pressurized fluid in opposite directions. In a 2 0 preferred embodiment, the pressurizing is provided at operating pressures ranging from about O to 9,000 psi. In a preferred embodiment, the pressurizing is provided at flow rates ranging from about O to 3,000 gallons/minute. In a preferred embodiment, the apparatus further includes sealing the interface between the preexisting structure and the tubular member at ends of the tubular member.
2 5 A method of expanding a tubular member has also been described that includes placing a mandrel within the tubular member, pressurizing a region within the tubular member, and displacing the mandrel with respect to the tubular member. In a preferred embodiment, the pressurizing is provided at operating pressures ranging from about O to 9,000 psi. In a preferred embodiment, the pressurizing is provided at flow 30 rates ranging from about O to 3,000 gallons/minute. In a preferred embodiment, the tubular member is expanded beginning at an upper portion of the tubular member.
( - A method of coupling a tubular member to preexisting structure has also been described that includes positioning the tubular member in an overlapping relationship to the preexisting structure, placing a mandrel within the tubular member, pressurizing an interior region within the tubular member, and displacing the mandrel with respect 5 to the tubular member. In a preferred embodiment, the pressurizing is provided at operating pressures ranging from about O to 9,000 psi. In a preferred embodiment, the pressurizing is provided at flow rates ranging from about O to 3,000 gallons/minute. In a preferred embodiment, the tubular member is expanded beginning at an upper portion of the tubular member.
10 A method of repairing a defect in a preexisting structure using a tubular member has also been described that includes positioning the tubular member in an overlapping relationship to the defect in the preexisting structure, placing a mandrel within the tubular member, pressurizing an interior region within the tubular member, and displacing the mandrel with respect to the tubular member. In a preferred 5 embodiment, the pressurizing is provided at operating pressures ranging from about O to 9,000 psi. In a preferred embodiment, the pressurizing is provided at flow rates ranging from about O to 3,000 gallons/minute. In a preferred embodiment, the tubular member is expanded beginning at an upper portion of the tubular member. In a preferred embodiment, the method further includes sealing the interface between the 2 0 preexisting structure and the tubular member at both ends of the tubular member.
An apparatus for radially expanding a tubular member has also been described that includes a first tubular member, a second tubular member coupled to the first tubular member, a third tubular member coupled to the second tubular member, and a mandrel positioned within the second tubular member and coupled to an end portion of the third 2 5 tubular member. In a preferred embodiment, the mandrel includes a fluid passage having an inlet adapted to receive fluid stop member. In a preferred embodiment, the apparatus further includes one or more slips coupled to the exterior surface of the third tubular member. In a preferred embodiment, the mandrel includes a conical surface.
In a preferred embodiment, the angle of attack of the conical surface ranges from about 3 0 10 to 30 degrees. In a preferred embodiment, the conical surface has a surface hardness ranging from about 58 to 62 Rockwell A. In a preferred embodiment, the
W-) average inside diameter of the second tubular member is greater than the average inside diameter of the third tubular member.
An apparatus has also been described that includes a tubular member, a piston adapted to expand the diameter of the tubular member positioned within the tubular 5 member, the piston including a passage for conveying fluids out of the tubular member. In a preferred embodiment' the piston includes a conical surface. In a preferred embodiment, the angle of attack of the conical surface ranges from about 10 to 30 degrees. In a preferred embodiment, the conical surface has a surface hardness ranging from about 58 to 62 Rockwell C. In a preferred embodiment, the tubular 10 member includes one or more sealing members coupled to the exterior surface of the tubular member.
A wellbore casing has also been described that includes a first tubular member and a second tubular member coupled to the first tubular member. The second tubular member is coupled to the first tubular member by the process of: positioning the 15 second tubular member in an overlapping relationship to the first tubular member, placing a mandrel within the second tubular member, pressurizing an interior region within the second tubular member, and displacing the mandrel with respect to the second tubular member. In a preferred embodiment, the pressurizing is provided at operating pressures ranging from about O to 9,000 psi. In a preferred embodiment, the 2 0 pressurizing is provided at flow rates ranging from about O to 3,000 gallons/minute.
An apparatus has also been described that includes a preexisting structure and a tubular member coupled to the preexisting structure. The tubular member is coupled to the preexisting structure by the process of: positioning the tubular member in an overlapping relationship to the preexisting structure, placing a mandrel within the 2 5 tubular member, pressurizing an interior region within the tubular member, and displacing the mandrel with respect to the tubular member. In a preferred embodiment, the pressurizing is provided at operating pressures ranging from about O to 9,000 psi. In a preferred embodiment, the pressurizing is provided at flow rates ranging from about O to 3,000 gallons/minute.
30 An apparatus has also been described that includes a preexisting structure having a defective portion and a tubular member coupled to the defective portion of r z o
Jo the preexisting structure. The tubular member is coupled to the defective portion of the preexisting structure by the process of: positioning the tubular member in an overlapping relationship to the defect in the preexisting structure, placing a mandrel within the tubular member, pressurizing an interior region within the tubular member, 5 and displacing the mandrel with respect to the tubular member. In a preferred embodiment, the pressurizing is provided at operating pressures ranging from about O to 9,000 psi. In a preferred embodiment, the pressurizing is provided at flow rates ranging from about O to 3,000 gallons/minute. In a preferred embodiment, the apparatus further includes sealing the interface between the preexisting structure and 10 the tubular member at both ends of the tubular member.
An apparatus also has been described that includes a first tubular member, a second tubular member, and a threaded connection for coupling the first tubular member to the second tubular member. The threaded connection includes one or more sealing members for sealing the interface between the first and second tubular 15 members. In a preferred embodiment, the threaded connection comprises a pin and box threaded connection. In a preferred embodiment, the sealing members are positioned adjacent to an end portion of the threaded connection. In a preferred embodiment' one of the sealing members is positioned adjacent to an end portion of the threaded connection; and wherein another one of the sealing members is not 2 0 positioned adjacent to an end portion of the threaded connection. In a preferred embodiment, a plurality of the sealing members are positioned adjacent to an end portion of the threaded connection.
An apparatus also has been described that includes a tubular assembly having a first tubular member, a second tubular member, and a threaded connection for coupling 2 S the first tubular member to the second tubular member. The threaded connection includes one or more sealing members for sealing the interface between the first and second tubular members. The tubular assembly is formed by the process of radially expanding the tubular assembly. In a preferred embodiment, the threaded connection comprises a pin and box threaded connection. In a preferred embodiment' the sealing 3 0 members are positioned adjacent to an end portion of the threaded connection. In a preferred embodiment, one of the sealing members is positioned adjacent to an end 6 6
c portion of the threaded connection; and wherein another one of the sealing members is not positioned adjacent to an end portion of the threaded connection. In a preferred embodiment, a plurality of the sealing members are positioned adjacent to an end portion of the threaded connection.
5 An apparatus also has been described that includes a tubular member and a mandrel positioned within the tubular member including a conical surface have an angle of attack ranging from about 10 to 30 degrees. In a preferred embodiment, the tubular member includes a first tubular member, a second tubular member, and a threaded connection for coupling the first tubular member to the second tubular 10 member. The threaded connection includes one or more sealing members for sealing the interface between the first and second tubular members. In a preferred embodiment, the threaded connection comprises a pin and box threaded connection.
In a preferred embodiment, the sealing members are positioned adjacent to an end portion of the threaded connection. In a preferred embodiment, one of the sealing 15 members is positioned adjacent to an end portion of the threaded connection; and wherein another one of the sealing members is not positioned adjacent to an end portion of the threaded connection. In a preferred embodiment, a plurality of the sealing members are positioned adjacent to an end portion of the threaded connection.
Although illustrative embodiments of the invention have been shown and 2 0 described, a wide range of modif cation, changes and substitution is contemplated in the foregoing disclosure. In some instances, some features of the present invention
may be employed without a corresponding use of the other features.
Go) The following Remstered Trade Marks are referred to in the specification
Super Seal II Teflon 5 Lubriplate EZ Drill Conversion to metric units of imperial units used throughout the specification:
10 0.75 to 47 inches and 1.05 to 48 inches (0,02 to 1,19 metres and 0,03 to 1.22 metres) 3 to 15.5 inches and 3.5 to 16 inches (0,08 to 0,40 metres and 0,09 to 0,41 metres) 40 to 20,000 feet (12,19 to 6.096,00 metres) O to 3,000 gallons/minute and O to 9,000 psi (O to 189,24 litres/sec. and O to 6.327.900,00 Kg/m2) 15 1,000 to 1,000,000 lbf (4.448, 00 Newtons to 4.448.000,00 Newtons) O to 5000 psi and O to 1,500 gallons/min (O to 3.515.500,00 Kg/m2 and O to 94,62 litres/sec.) 400 to l O,OOO psi and 30 to 4,000 gallons/min (281.240,00 to 7.031.000,00 Kg/m and 1,89 to 252,32 litres/sec.) 20 500 to 9,000 psi and 40 to 3,000 gallons/min (351.550,00 to 2.109.300,00 Kg/m2 and 2,52 to 189,24 litres/sec.) 500 to 9,000 psi (351.550,00 to 2.109.300,00 Kg/m2) O to 5 fL/sec (O to 91,45 metre/minute) O to 2 ftlsec (O to 36,58 metre/minute) 25 50 to 20,000 psi (35.155,00 to 14.062.000,00 Kg/m2) --.
400 to 10,000 psi (281.24000 to 7.031.000,00 Kg/m2) --.
5 ft (1,52 metres) 1.05 to 48 inches and 1/8 to 2 inches (0,03 to 1,22 metres and 0,003 to 0,05 metres) 3.5 to 16 inches and 3/8 to 1.5 inches (0,09 to 0,41 metres and 0,01 to 0,04 metres) 30 2.5 to 50 inches and 1/16 to 1.5 inches (0,06 to 1,27 metres and 0,002 to 0,04 metres) 3.S to 19 inches and] /S to 1.25 inches (0,09 to 0,48 metres and 0.003 to 0.032 metres)
cJ 2.5 to 50 inches and 1/16 to 1.25 inches (0,06 to 1,27 metres and 0, 002 to 0,032 metres) 35 to 19 inches and 1/8 to 1.25 inches (0,09 to 0,48 metres and 0,003 to 0,032 metres) 40 to 20,000 fit (12,19 Metres to 6.096, 00 metres) 5 40 to 3,000 gallons/minute and 500 to 9,000 psi (2,52 to 189, 24 litres/sec. and 351.550,00 to 6.327.900,00 Kg/m2) O to 500 gallons/minute and 0 to 1,000 psi (0 to 31,54 litres/sec. and 0 to 703. 100,00 Kg/m2) 40,000 to 135,000 psi (28.124.000,00 to 94.918.500,00 Kg/m2) 10 1/16 to 1.5 inches (0,002 to 0,0381 metres) 1/8 to 1.25 inches (0,003 to 0,032 metres) 1.05 to 48 inches (0,03 to 1,22 metres) 3.5 to 19 inches (0,09 to 0,48 metres) 2 to 5 feet (0,61 to 1,52 metres) 15 0 to 9,000 psi (0 to 6.327.900,00 Kg/m2) 0.125 to 3 inches (0,003 to 0,0762 metres) 0.25 to 0.75 inches (0,00635 to 0,1905 metres) 1 to 47 inches (0,0254 to 1, 1938 metres) O to 9,000 psi and 0 to 3,000 gallons/minute (0 to 6.327.900, 00 Kg/m2 and 0 to 189,24 20 litres/sec.) O to 5,000 psi and 0 to 1,500 gallons/minute (0 to 3.515.500,00 Kg/m2 and 0 to 94,62 litres/sec.) 1,200 to 8,500 psi (843.720,00 to 5.976.350,00 Kg/m2) 40 to 1,250 gallons/min (2,52 to 78,85 litres/sec.) 25 0 to S,OOO psi and O to 1,500 gallons/min (0 to 3.515.500,00 Kg/m2 and 0 to 94,62 litres/sec.) 1200 to 8500 psi and 40 to 1,500 gallons/min (843.720,00 to 5.976.350,00 Kg/m2 and 2,52 to 141. 930,00 litres/sec.) 1200 to 8500 psi (843.720,00 to 5.976.350,00 Kg/m2) 30 500 to 10,000 psi (351.550,00 to 7.031.000,00 Kg/m2) 3/8 to 1 'id: inches and 3 tip: to 16 inches (0,009525 to 0,0381 metres and 0.0889 to q
0,4064 metres) 0.-625 to 0.75 inches and 3 to 19 inches (0,015875 to 0, O190S metres and 0,0762 to 0,4826 metres) 5,000 to 20,000 psi (3.515.500 to 14.062.000,00 Kg/m2) 5 0.125 to 1.5 inches (0,003 to 0,038 metres) 0. 25 to 1.0 inches (0,00635 to 0,0254 metres) 120 to 2400 inches (3,048 to 60,96 metres) 240 to 480 inches (6,096 to 12,192 metres) 0.05 to 0.75 inches (0,00127 to 0,01905 metres) 10 0.1 to 0.5 inches (0,00254 to 0, 0127 metres) O to 750,000 Ibf (O to 103.725,00 Newtons) O to 500 gallonslminute and O to 9,000 psi (O to 31,54 litres/sec. and O to 6.327. 900,00 Kg/m2.) O to 5,000 psi (O to 3.515.500,00 Kg/m2) 15 0 to 9,000 psi and O to 500 gallons/minute (O to 6.327.900,00 Kg/m2 and O to 31,54 litres/sec.) SOO to S,OOO psi and O to 500 gallons/minute (351.550,00 to 3.515.500 Kg/m2 and O to 31,54 litres/sec.) 0.0025 to 0.05 inches (0, 0000635 to 0,00127 metres) 20 0.005 to 0.01 inches (0,00127 to 0,000254 metres) 0.025 to 0.375 inches (0,000635 to 0,009525 metres) 0.025 to 0. 125 inches (0,000635 to 0,0003175 metres) 2 to 34 inches (O,0508 to 0, 8636 metres) 3 to 28 inches (0,0762 to 0,7112 metres) 25 0.15 to 1.5 inches (0,00381 to 0,0381 metres) O to 4,500 psi and O to 3,000 gallons/minute (O to 3.163.9SO,OO Kg/m2 and O to 189,24 litres/sec) O to 4,500 psi and O to 4,500 gallons/minute (O to 3.163.950,00 Kg/m2 and O to 283,86 litres/sec) 30 0 to 3,500 psi and O to 1,200 gallons/minute (O to 2.460.850,00 Kg/m2 and O to 75,696 !itres/sec) 2'
c' 100 to 1,000 psi (70.310,00 to 703.100,00 Kg/m2) O to 500 psi (0 to 351.550,00 Kg/m2) 10 to 45 ft (3,048 metres to 13,716 metres) 0.005 to 0. 125 inches (0,000127 to 0,0003175 metres) 5 500 to 40,000 psi (351.550,00 to 28.124.000.00 Kg/m2) O to 9,000 psi and 0 to 5,000 gallons/minute (0 to 6.327.900,00 Kg/m2 and 0 to 79.264,426 litres/sec.) 10 to 45 fit (3, 048 metres to 13,716 metres) O to 10,000 psi and 0 to 3,000 gallons/minute (0 to 7.031.000,00 Kg/m2 and 0 to 10 189,24 litres/sec.) O to 12,000 psi and 0 to 3,500 gallons/minute (0 to 8.437.200,00 Kg/m2 and 0 to 220,78 litres/sec) O to 12,000 psi arid 0 to 10,000 gallons/minute (0 to 8.437.200,00 Kg/m2 and 0 to 630,80 litres/sec) 15 0 to 5,000 psi and 40 to3,000 gallons/minute (0 to 3.515.500,00 Kg/m2 and 2,5232 to 189, 24 litres/sec) 1 000 to 9,000 psi (703.100,00 to 6.327.900,00 Kg/m2) 3 to 15.5 inches (0,0762 to 0,3937 metres) 3.5 to 16 inches (0,0889 to 0,4064 metres) 20 0 to 9,000 psi (0 to 6.327.900,00 Kg/m2) O to 3,000 gallons/minute (0 to 189,24 litres/sec.)
Claims (1)
- al CLAIMS:1. A method of sealing an engaged threaded connection between a threaded tubular pin member and a threaded tubular box member comprising the steps of: disposing a sealing component in an annular area defined between the threaded tubular 5 pin member and the threaded tubular box member; and radially expanding the pin member and the box member to compress the sealing component to form a seal in the annular area whereby fluids are prevented from moving axially across the annular area.2. The method of claim 1, wherein the sealing component expands at least about 10 20 percent in the axial direction within the annular area during the radial expansion.3. The method of claim I, wherein the sealing component is carried in an annular groove formed in one of the members in the annular area.15 4. A radially expanded, sealed connection between a threaded pipe pin and a threaded pipe box made by the process of: threadably engaging a threaded pipe pin into a threaded pipe box to form an annular engaged area between the threaded pipe pin and the threaded pipe box; disposing an annular sealing component in the annular engaged area between the threaded pipe pin and the threaded pipe box; and radially 2 0 expanding the threaded pipe pin and the threaded pipe box in the engaged area to compress the annular sealing component in the engaged area for forming a seal preventing axial fluid travel across the engaged area.5. The method of claim 4, wherein the sealing component is carried in an annular 2 5 groove in the threaded pipe pin or the threaded pipe box.6. The method of claim 4, wherein the sealing component expands at least about 20 percent in the axial direction within the annular area during the radial expansion.it - ?1. A method of creating a casing in a borehole located in a subterranean formation, comprising: installing a tubular liner and a mandrel in the borehole; injecting fluidic material into the borehole; 5 pressurizing a portion of an interior region of the tubular liner; and radially expanding at least a portion of the liner in the borehole by extruding at least a portion of the liner off of the mandrel.2. An apparatus for expanding a tubular member, comprising: 10 a support member, the support member including a first fluid passage; a mandrel coupled to the support member, the mandrel including: a second fluid passage; a tubular member coupled to the mandrel; and a shoe coupled to the tubular liner, the shoe including a third fluid passage; 15 wherein the first, second and third fluid passages are operably coupled.3. A method of joining a second tubular member to a first tubular member, the first tubular member having an inner diameter greater than an outer diameter of the second tubular member, comprising: 2 0 positioning a mandrel within an interior region of the second tubular member; pressurizing a portion of the interior region of the second tubular member; and extruding at least a portion of the second tubular member off of the mandrel into engagement with the first tubular member.25 4. A tubular liner, comprising: an annular member, the annular member including: one or more sealing members at an end portion of the annular member; and one or more pressure relief passages at an end portion of the annular 3 0 member.c S. A wellbore casing, comprising: a tubular liner, the tubular liner formed by the process of: extruding the tubular liner off of a mandrel; and an annular body of a cured fluidic sealing material coupled to the tubular liner.6. A tie-back liner for lining an existing wellbore casing, comprising: a tubular liner, the tubular liner formed by the process of: extruding at least a portion of the tubular liner off of a mandrel; and an annular body of a cured fluidic sealing material coupled to the tubular liner.7. An apparatus for expanding a tubular member, comprising: a support member including a first fluid passage; a mandrel coupled to the support memUcr, the mandrel including: a second fluid passage operably coupled to the first fluid passage; 15 an interior portion; and an exterior portion; wherein the interior portion of the mandrel is drillable; an expandable tubular member coupled to the mandrel; and a shoe coupled to the tubular member, the shoe including: 2 0 a third fluid passage operably coupled to the second fluid passage; an interior portion; and an exterior portion; wherein the interior portion of the shoe is drillable.2 5 8. A wellhead, comprising: an outer casing, and a plurality of substantially concentric and overlapping inner casings coupled to the outer casing; wherein each inner casing is supported by contact pressure between an outer 3 0 surface of the inner casing and an inner surface of the outer casing.G- A / The ',.9. A wellhead, comprising: an outer casing at least partially positioned within a wellbore; and a plurality of substantially concentric inner casings coupled to the interior surface of the outer casing by the process of expanding one or more of 5 the inner casings into contact with at least a portion of the interior surface of the outer casing.10. A method of forming a wellhead, comprising: drilling a wellbore; 10 positioning an outer casing at least partially within an upper portion of the wellbore; positioning a first tubular member within the outer casing; expanding at least a portion of the first tubular member into contact with an interior surface of the outer casing; 15 positioning a second tubular member within the outer casing and the first tubular member; and expanding at least a portion of the second tubular member into contact with an interior portion of the outer casing.2 0 1 1. An apparatus, comprising: an outer tubular member; and a plurality of substantially concentric and overlapping ironer tubular members coupled to the outer tubular member; wherein each inner tubular member is supported by contact pressure between an 2 5 outer surface of the inner casing and an inner surface of the outer inner tubular member.19. An apparatus, comprising: an outer tubular member; and 30 a plurality of substantially concentric inner tubular members coupled to the interior surface of the outer tubular member by, the process of expanding 4,W'., one or more of the inner tubular members into contact with at least a portion of the interior surface of the outer tubular member.13. A wellbore casing, comprising: 5 a first tubular member; and a second tubular member coupled to the first tubular member in an overlapping relationship; wherein the inner diameter of the first tubular member is substantially equal to the inner diameter of the second tubular member.14. A wellbore casing, comprising: a tubular member including at least one thin wall section and a thick wall section; and a compressible annular member coupled to each thin wall section.l 5. A method of creating a casing in a borehole located in a subterranean formation, comprising: supporting a tubular liner and a mandrel in the borehole using a support member; 2 0 injecting fluidic material into the borehole; pressurizing an interior region of the mandrel; displacing a portion of the mandrel relative to the support member; and radially expanding the tubular liner.16. A wellhore casing, comprising: 2 5 a first tubular member having a first inside diameter; and a second tubular member having a second inside diameter substantially equal to the first inside diameter coupled to the first tubular member in an overlapping relationship; wherein the first and second tubular members are coupled by the process of 3 0 deforming a portion of the second tubular member into contact with a portion of the first tubular member.,,1 17. An apparatus for expanding a tubular member, comprising: a support member including a fluid passage; a mandrel movably coupled to the support member including an expansion 5 cone; at least one pressure chamber defined by and positioned between the support member and mandrel fluidicly coupled to the first fluid passage; and one or more releasable supports coupled to the support member adapted to support the tubular member.l 8. An apparatus, comprising: one or more solid tubular members, each solid tubular member including one or more external seals; one or more slotted tubular members coupled to the solid tubular members; and 15 a shoe coupled to one of the slotted tubular members.I 9. A method of joining a second tubular member to a first tubular member, the first tubular member having an inner diameter greater than an outer diameter of the second tubular member, comprising: 2 0 positioning a mandrel within an interior region of the second tubular member; pressurizing a portion of the interior region of the mandrel; displacing the mandrel relative to the second tubular member; and extruding at least a portion of the second tubular member off of the mandrel into engagement with the first tubular member.20. An apparatus, comprising: one or more primary solid tubulars, each primary solid tubular including one or more external annular seals; n slotted tubulars coupled to the primary solid tubulars; 2-i7= Y:10 v_ _ n-1 intermediate solid tubulars coupled to and interleaved among the slotted tubulars, each intermediate solid tubular including one or more external annular seals; and a shoe coupled to one of the slotted tubulars.21. A method of isolating a first subterranean zone from a second subterranean zone in a wellbore, comprising: positioning one or more primary solid tubulars within the wellbore, the primary À solid tubulars traversing the first subterranean zone; 10 positioning one or more slotted tubulars within the wellbore the slotted tubulars traversing the second subterranean zone; fluidicly coupling the slotted tubulars and the solid tubulars; and preventing the passage of fluids from the first subterranean zone to the second subterranean zone within the wellbore external to the solid and slotted 1 5 tubulars.22. A method of extracting materials from a producing subterranean zone in a wellbore' at least a portion of the wellbore including a casing, comprising; positioning one or more primary solid tubulars within the wellbore; 2 0 fluidicly coupling the primary solid tubulars with the casing; positioning one or more slotted tubulars within the wellbore, the slotted tubulars traversing the producing subterranean zone; fluidicly coupling the slotted tubulars with the solid tubulars; fluidicly isolating the producing subterranean zone from at least one other 25 subterranean zone within the wellbore; and fluidicly coupling at least one of the slotted tubulars from the producing subterranean zone.23. A method of creating a casing in a borehole while also drilling the borehole, 3 0 comprising: installing a tubular liner. a mandrel' and a drilling assemble in the borehole; 4, O\ Hi injecting fluidic material within the tubular liner, mandrel and drilling assembly; radially expanding at least a portion of the tubular liner; and drilling the borehole using the drilling assembly.24. An apparatus, comprising: a support member, the support member including a first fluid passage; a mandrel coupled to the support member, the mandrel including: a second fluid passage; 10 a tubular member coupled to the mandrel; and a shoe coupled to the tubular liner, the shoe including a third fluid passage; and a drilling assembly coupled to the shoe; wherein the first, second and third fluid passages and the drilling assembly are operably coupled.25. A method of forming an underground pipeline within an underground tunnel including at least a first tubular member and a second tubular member, the first tubular member having an inner diameter greater than an outer diameter of the second tubular member, comprising: 20 positioning the first tubular member within the tunnel; positioning the second tubular member within the tunnel in an overlapping relationship with the first tubular member; positioning a mandrel and a drilling assembly within an interior region of the second tubular member; 25 injecting a Iluidic material within the mandrel, drilling assembly and the second tubular member; extruding at least a portion of the second tubular member off of the mandrel into engagement with the first tubular member; and drilling the tunnel.26. An apparatus, comprising:- a wellbore, the wellbore formed by the process of drilling the wellbore; and a tubular liner positioned within the wellbore, the tubular liner formed by the process of extruding the tubular liner off of a mandrel while drilling the wellbore. 27. A method of expanding a tubular member, comprising: placing a mandrel within the tubular member; pressurizing an annular region within the tubular member; and displacing the mandrel with respect to the tubular member.28. A method of coupling a tubular member to preexisting structure, comprising: positioning the tubular member in an overlapping relationship to the preexisting structure; placing a mandrel within the tubular member; pressurizing an annular region within the tubular member; and displacing the mandrel with respect to the tubular member.29. A method of repairing a defect in a preexisting structure using a tubular member, comprising: 2 0 positioning the tubular member in an overlapping relationship to the defect in the preexisting structure; placing a mandrel within the tubular member; pressurizing an annular region within the tubular member; and displacing the mandrel with respect to the tubular member.30. An apparatus for radially expanding a tubular member, comprising: a first tubular member; a second tubular member positioned within the first tubular member; a third tubular member movably coupled to and positioned within the second 3 0 tubular member; vC r. _ a first annular sealing member for sealing an interface between the first and second tubular members; a second annular sealing member for sealing an interface between the second and third tubular members; and 5 a mandrel positioned within the first tubular member and coupled to an end of the third tubular member.31. An apparatus, comprising: a tubular member; 10 a piston adapted to expand the diameter of the tubular member positioned within the tubular member, the piston including a passage for conveying fluids out of the tubular member; and an annular chamber defined by the piston and tubular member.15 32. A wellbore casing, comprising: a first tubular member; and a second tubular member coupled to the first tubular member by the process of: positioning the second tubular member in an overlapping relationship to the first tubular member 2 0 placing a mandrel within the second tubular member; pressurizing an annular region within the second tubular member; and displacing the mandrel with respect to the second tubular member.33. An apparatus, comprising: 2 5 a preexisting structure; and a tubular member coupled to the preexisting structure by the process of: positioning the tubular member in an overlapping relationship to the preexisting structure; placing a mandrel within the tubular member; 3 0 pressurizing an annular region within the tubular member; and displacing the mandrel with respect to the tubular member.34. An apparatus, comprising: a preexisting structure having a defective portion; and a tubular member coupled to the defective portion of the preexisting structure 5 by the process of: positioning the tubular member in an overlapping relationship to the defect in the preexisting structure; placing a mandrel within the tubular member; pressurizing an annular region within the tubular member; and displacing the mandrel with respect to the tubular member.35. A method of expanding a tubular member, comprising: placing a mandrel within the tubular member; pressurizing a region within the tubular member; and 15 displacing the mandrel with respect to the tubular member.36. A method of coupling a tubular member to preexisting structure, comprising: positioning the tubular member in an overlapping relationship to the preexisting structure; 2 0 placing a mandrel within the tubular member; pressurizing an interior region within the tubular member; and displacing the mandrel with respect to the tubular member.37. A method of repairing a defect in a preexisting structure using a tubular 25 member, comprising: positioning the tubular member in an overlapping relationship to the defect in the preexisting structure; placing a mandrel within the tubular member; pressurizing an interior region within the tubular member; and 30 displacing the mandrel with respect to the tubular member.v38. An apparatus for radially expanding a tubular member, comprising: a first tubular member; a second tubular member coupled to the first tubular member; a third tubular member coupled to the second tubular member; and 5 a mandrel positioned within the second tubular member and coupled to an end portion of the third tubular member.39. An apparatus, comprising: a tubular member; 10 a piston adapted to expand the diameter of the tubular member positioned within the tubular member, the piston including a passage for conveying fluids out of the tubular member.40. A wellbore casing, comprising: 15 a first tubular member; and a second tubular member coupled to the first tubular member by the process of: positioning the second tubular member in an overlapping relationship to the first tubular member placing a mandrel within the second tubular member; 2 0 pressurizing an interior region within the second tubular member; and displacing the mandrel with respect to the second tubular member.41. An apparatus, comprising: a preexisting structure; and 2 5 a tubular member coupled to the preexisting structure by the process of: positioning the tubular member in an overlapping relationship to the preexisting structure; placing a mandrel within the tubular member; pressurizing an interior region within the tubular member; and 3 0 displacing the mandrel with respect to the tubular member.? q ?42. An apparatus, comprising: a preexisting structure having a defective portion; and a tubular member coupled to the defective portion of the preexisting structure by the process of: 5 positioning the tubular member in an overlapping relationship to the defect in the preexisting structure; placing a mandrel within the tubular member; pressurizing an interior region within the tubular member; and displacing the mandrel with respect to the tubular member.43. An apparatus, comprising: a first tubular member; a second tubular member; and a threaded connection for coupling the first tubular member to the second 15 tubular member, the threaded connection including: one or more sealing members for sealing the interface between the first and second tubular members.44. The apparatus of claim 43, wherein the threaded connection comprises a pin 2 0 and box threaded connection.45. The apparatus of claim 43, wherein the sealing members are positioned adjacent to an end portion of the threaded connection.2 5 46. The apparatus of claim 43, wherein one of the sealing members is positioned adjacent to an end portion of the threaded connection; and wherein another one of the sealing members is not positioned adjacent to an end portion of the threaded connection. 3 0 47. The apparatus of claim 43, wherein a plurality of the sealing members are positioned adjacent to an, end portion of the threaded connection.48. An apparatus, comprising: a tubular assembly including: a first tubular member; 5 a second tubular member; and a threaded connection for coupling the first tubular member to the second tubular member, the threaded connection including: one or more sealing members for sealing the interface between the first and second tubular members; 1 o wherein the tubular assembly is formed by the process of radially expanding the tubular assembly.49. The apparatus of claim 48, wherein the threaded connection comprises a pin and box threaded connection.SO. The apparatus of claim 48, wherein the sealing members are positioned adjacent to an end portion of the threaded connection.51. The apparatus of claim 48, wherein one of the sealing members is positioned 2 0 adjacent to an end portion of the threaded connection; and wherein another one of the sealing members is not positioned adjacent to an end portion of the threaded connection. 52. The apparatus of claim 48, wherein a plurality of the sealing members are 2 5 positioned adjacent to an end portion of the threaded connection.53. An apparatus, comprising: a tubular member; and a mandrel positioned within the tubular member including a conical surface 30 have an angle of attack ranging from about lO to 30 degrees.( 54. The apparatus of claim 53, wherein the tubular member includes: a first tubular member; a second tubular member; and a threaded connection for coupling the first tubular member to the second 5 tubular member, the threaded connection including: one or more sealing members for sealing the interface between the first and second tubular members.55. The apparatus of claim 53, wherein the threaded connection comprises a pin 10 and box threaded connection.56. The apparatus of claim 53, wherein the sealing members are positioned adjacent to an end portion of the threaded connection.15 57. The apparatus of claim 53, wherein one of the sealing members is positioned adjacent to an end portion of the threaded connection; and wherein another one of the sealing members is not positioned adjacent to an end portion of the threaded connection. 2 0 58. The apparatus of claim 53, wherein a plurality of the sealing members are positioned adjacent to an end portion of the threaded connection.:8c
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US13110699P | 1999-04-26 | 1999-04-26 | |
| GB0016917A GB2355738B (en) | 1999-04-26 | 2000-04-27 | Method of creating a casing with a deformable tubing |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB0318547D0 GB0318547D0 (en) | 2003-09-10 |
| GB2388393A true GB2388393A (en) | 2003-11-12 |
| GB2388393B GB2388393B (en) | 2003-12-17 |
Family
ID=29217363
Family Applications (5)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0313406A Expired - Lifetime GB2388391B (en) | 1999-04-26 | 2000-04-27 | A connection for expandable tubulars |
| GB0318550A Expired - Fee Related GB2388395B (en) | 1999-04-26 | 2000-04-27 | Expandable connector |
| GB0318545A Expired - Fee Related GB2388392B (en) | 1999-04-26 | 2000-04-27 | Expandable connector |
| GB0318549A Expired - Fee Related GB2388394B (en) | 1999-04-26 | 2000-04-27 | Expandable connector |
| GB0318547A Expired - Fee Related GB2388393B (en) | 1999-04-26 | 2000-04-27 | Expandable connector |
Family Applications Before (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0313406A Expired - Lifetime GB2388391B (en) | 1999-04-26 | 2000-04-27 | A connection for expandable tubulars |
| GB0318550A Expired - Fee Related GB2388395B (en) | 1999-04-26 | 2000-04-27 | Expandable connector |
| GB0318545A Expired - Fee Related GB2388392B (en) | 1999-04-26 | 2000-04-27 | Expandable connector |
| GB0318549A Expired - Fee Related GB2388394B (en) | 1999-04-26 | 2000-04-27 | Expandable connector |
Country Status (1)
| Country | Link |
|---|---|
| GB (5) | GB2388391B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7357188B1 (en) | 1998-12-07 | 2008-04-15 | Shell Oil Company | Mono-diameter wellbore casing |
| US7546881B2 (en) | 2001-09-07 | 2009-06-16 | Enventure Global Technology, Llc | Apparatus for radially expanding and plastically deforming a tubular member |
| WO2004081346A2 (en) | 2003-03-11 | 2004-09-23 | Enventure Global Technology | Apparatus for radially expanding and plastically deforming a tubular member |
| AU2003230589A1 (en) | 2002-04-12 | 2003-10-27 | Enventure Global Technology | Protective sleeve for threaded connections for expandable liner hanger |
| CA2482278A1 (en) | 2002-04-15 | 2003-10-30 | Enventure Global Technology | Protective sleeve for threaded connections for expandable liner hanger |
| AU2003265452A1 (en) | 2002-09-20 | 2004-04-08 | Enventure Global Technology | Pipe formability evaluation for expandable tubulars |
| US6997264B2 (en) * | 2002-10-10 | 2006-02-14 | Weatherford/Lamb, Inc. | Method of jointing and running expandable tubulars |
| US7886831B2 (en) | 2003-01-22 | 2011-02-15 | Enventure Global Technology, L.L.C. | Apparatus for radially expanding and plastically deforming a tubular member |
| CA2523862C (en) | 2003-04-17 | 2009-06-23 | Enventure Global Technology | Apparatus for radially expanding and plastically deforming a tubular member |
| US7712522B2 (en) | 2003-09-05 | 2010-05-11 | Enventure Global Technology, Llc | Expansion cone and system |
| WO2006020960A2 (en) | 2004-08-13 | 2006-02-23 | Enventure Global Technology, Llc | Expandable tubular |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2347952A (en) * | 1999-02-26 | 2000-09-20 | Shell Int Research | Apparatus for coupling a liner to a well casing |
-
2000
- 2000-04-27 GB GB0313406A patent/GB2388391B/en not_active Expired - Lifetime
- 2000-04-27 GB GB0318550A patent/GB2388395B/en not_active Expired - Fee Related
- 2000-04-27 GB GB0318545A patent/GB2388392B/en not_active Expired - Fee Related
- 2000-04-27 GB GB0318549A patent/GB2388394B/en not_active Expired - Fee Related
- 2000-04-27 GB GB0318547A patent/GB2388393B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2347952A (en) * | 1999-02-26 | 2000-09-20 | Shell Int Research | Apparatus for coupling a liner to a well casing |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0318547D0 (en) | 2003-09-10 |
| GB0318549D0 (en) | 2003-09-10 |
| GB2388395B (en) | 2003-12-17 |
| GB2388392A (en) | 2003-11-12 |
| GB0318545D0 (en) | 2003-09-10 |
| GB2388392B (en) | 2003-12-17 |
| GB2388394A (en) | 2003-11-12 |
| GB2388394B (en) | 2003-12-17 |
| GB0313406D0 (en) | 2003-07-16 |
| GB2388391A (en) | 2003-11-12 |
| GB2388391B (en) | 2003-12-17 |
| GB2388393B (en) | 2003-12-17 |
| GB2388395A (en) | 2003-11-12 |
| GB0318550D0 (en) | 2003-09-10 |
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| 732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) |
Free format text: REGISTERED BETWEEN 20141113 AND 20141119 |
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| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20170427 |