WO2001040612A2 - Apparatus for hanging tubulars in wells - Google Patents

Apparatus for hanging tubulars in wells Download PDF

Info

Publication number
WO2001040612A2
WO2001040612A2 PCT/US1999/012025 US9912025W WO0140612A2 WO 2001040612 A2 WO2001040612 A2 WO 2001040612A2 US 9912025 W US9912025 W US 9912025W WO 0140612 A2 WO0140612 A2 WO 0140612A2
Authority
WO
WIPO (PCT)
Prior art keywords
hanger
cylindrical tube
swedge
well tubulars
shoulder
Prior art date
Application number
PCT/US1999/012025
Other languages
French (fr)
Other versions
WO2001040612A3 (en
Inventor
Leo D. Hudson
Original Assignee
Bestline Liner Systems, Inc.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to US8565998A priority Critical
Priority to US09/085,659 priority
Application filed by Bestline Liner Systems, Inc. filed Critical Bestline Liner Systems, Inc.
Publication of WO2001040612A2 publication Critical patent/WO2001040612A2/en
Publication of WO2001040612A3 publication Critical patent/WO2001040612A3/en

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/02Subsoil filtering
    • E21B43/10Setting of casings, screens, liners or the like in wells
    • E21B43/103Setting of casings, screens, liners or the like in wells of expandable casings, screens, liners, or the like
    • E21B43/105Expanding tools specially adapted therefor

Abstract

A hanger mechanism for well tubulars includes a cylindrical tube (10) assembled with a hydraulic ram (40) to which is attached a solid swedge (62). An inner boss (18) is provided about the interior of the cylindrical tube (10) through an axial section of the length thereof. The swedge (62) interferes with the inner boss (18) to inelastically expand the cylindrical tube (10) at that point. An outer boss (26) may extend about the same area so as to be driven out and into interfering contact with an outer tubular within the well. The outer boss (26) may have a concentrically continuous surface with or without seals (34, 36) located in grooves (32). Alternatively, axial grooves (38) may extend through the outer boss (26) so as to provide cementing circulation outwardly of the tubular string. The swedge (62) may include a body (72) with a cylindrical sleeve (74) threaded thereto. The body (72) fits within the un-swedged inner boss (18) while the sleeve (74) provides swedging engagement.

Description

Description APPARATUS FOR HANGING TUBULARS IN WELLS

Background Of The Invention

The field of the present invention is well drilling and completion systems.

Well drilling and completion equipment includes tubulars which are variously characterized as casing, tubing and liner. For universal application, they are cylindrical in shape and of a length in compliance with the American Petroleum Institute Standard 5C. The term "casing" is typically applied to tubulars which are larger in diameter and used to support the earth's encroachment when drilling a bore hole for a well. Often casing is cemented to the bore hole to define a sound structural member and to prevent migration of unwanted gases, water or other fluids outwardly of the casing. Casing is typically assembled from 40 foot long tubulars with threaded couplings. Wells can extend for several miles into the earth. As the well increases in depth, the hydraulic pressures to which the casing is subjected to increase. Decreases in casing diameter with increasing depth is common, often to avoid experiencing excessive force from such high pressures. Such decreases typically occur in step function as smaller casing is employed. "Liner" is typically made up of tubulars in an area of well production.

Liner can have portions with slots prefabricated through the wall, end closure elements and the like. Liner is typically smaller in diameter than casing and is typically placed in wells after casing to extend from casing into production zones. Other tubing may be employed within casing to bring production to the surface and for other communication within wells. This too is placed in wells after casing and has a reduced diameter.

To insure the flow of fluids with or without entrained solids are appropriately directed within wells, packers or annular seals are frequently employed to span gaps at radial steps in tubular construction within wells.

Packers are also employed to insure the blockage of pressure from unwanted areas. Additionally, structural support from above frequently is needed for such placements. The compression of tubular strings through placement on the bottom is often considered to be detrimental to the pressure integrity of the structure. Consequently, suspending liner or casing in tension is preferred. Hangers typically are used which employ wedges or other structural devices to grip the inner tubular. Combinations of packers and hangers are also used.

One system for hanging a tubular in a well includes expanding the inner tubular outwardly past the elastic limit and into an outer tubular such that the elasticity of the outer tubular draws it tight against the inner tubular.

Summary Of The Invention

The present invention is directed to hangers for well tubulars. In a first separate aspect of the present invention, a cylindrical tube includes an axial section with an interior boss. A ram is associated with a swedge to provide the capability for drawing the swedge through the axial section with the interior boss to expand the cylindrical tube. The surface of the inner boss may be circumferentially continuous and may be displaced from either end of the cylindrical tube.

In a second separate aspect of the present invention, the hanger of the first separate aspect additionally includes an outer boss associated with the axial section. This outer boss may have a circumferentially continuous surface or one with axial grooves therein. If continuous, a circumferential seal may also be provided in a circumferential groove.

In a third separate aspect of the present invention, the swedge of the first separate aspect includes a truncated conical surface. This surface extends into interference with the inner boss. A feature which may be added to permit extraction upon tubular failure is a sleeve about the body of the swedge. The sleeve is fixed relative to the cylindrical tube by a shear pin. The sleeve may be threaded onto the swedge body. Only the sleeve is in interference with the inner boss such that the body can be threaded out of the sleeve and extracted.

In a fourth separate aspect of the present invention, combinations of the foregoing aspects are contemplated.

Accordingly, it is an object of the present invention to provide improved hangers and hanger systems. Other and further objects and advantages will appear hereinafter.

Brief Description Of The Drawings

Figure 1 is a partial cross-sectional side view of a hanger. Figure 2 is a partial cross-sectional view of the hanger of Figure 1 broken into section in a larger scale.

Figure 3 is a partial cross-sectional side view of a cylindrical tube of the hanger.

Figure 4 is a partial cross-sectional side view of a cylindrical tube of the hanger.

Figure 5 is a partial cross-sectional side view of a cylindrical tube of the hanger with a second outer boss. Figure 6 is a detail in partial cross section of a swedge shown in a cylindrical tube in cross section with a release mechanism.

Detailed Description Of The Preferred Embodiments

Turning in detail to the drawings, Figure 1 illustrates a hanger mechanism capable of being assembled with a tubular string to extend downwardly therefrom in a well. A cylindrical member, or tube, is swedged outwardly into interfering association with a previously positioned tubular such as a casing. Once the cylindrical tube with the associated tubular string is positioned, a ram and swedge performing the swedging operation are removed. The cylindrical tube of the hanger, which remains, then supports the tubular string. The cylindrical tube may or may not provide a seal as well, depending upon its configuration. This hanger mechanism may be used with the method for hanging tubulars disclosed in U.S. Patent Application Serial No. 08/947,069 referred to above, the disclosure of which is incorporated herein by reference. Looking to the several components as best illustrated in Figures 2A-C, a cylindrical tube, generally designated 10, includes an axial bearing shoulder 12 at one end. A threaded end 14 is also provided for attachment of a tubular string. A second cylindrical tube 16 having male threads at both ends provides an adapter for the tubular string. An inner boss 18 extends about the interior of the cylindrical tube 10 between the ends. The inner boss 18 is 5 shown to have a concentrically continuous inner peripheral surface 20. The surface is axially discontinuous at the ends 22 and 24 of the inner boss 18 where truncated conical sections provide for the inner boss 18 to taper to the larger uniform inner diameter of the cylindrical tube 16. The surface 20 and the ends 22 and 24 define an axial section within the cylindrical tube. It may 0 be advantageous under certain circumstances to also consider the prospect of a concentrically discontinuous inner peripheral surface 20 under certain conditions. However, the swaging process is enhanced by having a balanced expansion of a continuous ring or symmetrically arranged segments. The cylindrical tube 16 is shown to include a retainer shoulder 17 which extends 5 inwardly from the uniform inner surface of the cylindrical tube 10.

An outer boss 26 is arranged in the axial section of the cylindrical tube 16. The outer boss 26 is designed to create increased locking with an outer tubular. The outer boss 26 may have a concentrically continuous outer peripheral surface 28 as illustrated in Figure 3. This outer surface 28 may 0 include axial discontinuities in the form of grooves 30 and 32 to receive seals

34 and 36. The seals may be made of particularly ductile metal, a polymer or the like. The seals 34 and 36 preferably extend somewhat from the grooves 30 and 32 in a radial direction to insure compression sealing with an outer tubular. Finally, the surface 28 may be concentrically discontinuous by 5 including axial grooves 38. Such grooves may be of value for cementing outwardly of the tubular string after placement. The axial grooves are also preferably spaced uniformly so as to provide a balanced swaging operation.

A ram, generally designated 40 is positioned above the cylindrical tube 10. The ram 40 includes a ram shoulder 42 which abuts against the axial o bearing shoulder of the cylindrical tube 10. The ram 40 is of generally known construction, including a cylinder 44 with a double piston 46 slidably positioned therein. A central bore 48 provides pressurized fluid to ports 50 and 52 to forcefully draw the double piston 46 away from the ram shoulder 42. A draw bar 54 extends downwardly from the double piston 46 through the cylindrical tube 10.

The draw bar 54 extends to a threaded pin end 56 to attach to the socket end 58 of a pipe section 60. A solid swedge, generally designated 62, is maintained on the draw bar 54 by the pipe section 60. The swedge 62 includes a central bore 64 to receive the draw bar 54, a truncated conical section 66 and a cylindrical section 68. A bevel 70 adjacent the cylindrical section 68 defines a truncated conical surface as well. The cylindrical section 68 and a portion of the truncated conical section 66 have a dimension wider than the interior surface of the inner boss 18. Consequently, as the swedge 62 is drawn by the ram 40 through the interior boss 18, the outer boss 26 is driven outwardly beyond the yield point of the cylindrical tube 10 into an outer tubular member. The remaining interior of the cylindrical tube 10 to either side of the axial section is large enough to accommodate the full dimension of the swedge 62. the retainer shoulder 17 on the cylindrical tube 16 receives the bevel 70 to prevent the swedge 62 from sliding downwardly through the cylindrical tube 10. Until forcefully drawn by the ram 40, the swedge 62 can support the cylindrical tube 10 and the extending tubular string as the overall assembly is lowered into a well. Figure 6 illustrates a second configuration of the swedge 62. In this second configuration, the swedge 62 includes a body 72 and a sleeve 74. The sleeve 74 is threaded onto the periphery of the body. The truncated conical section 66 includes a portion defined by the body 72 and a portion defined by the sleeve 74. Preferably, the body 72 fits through the un- swedged inner boss 18 while the sleeve 74 expands the inner boss 18 sufficiently for setting within the outer tubular member. The sleeve 74 is initially fixed from rotating relative to the cylindrical tube 10 by means of a sheer pin 76. If a failure occurs within the well and the cylindrical tube 10 with the drill string cannot be removed and the swedge 62 cannot be drawn clear therefrom, rotational torque can be exerted through drill pipe coupled with the ram 40 to rotate the body 72 from the sleeve 74 and extracted. In normal operation, the operation of the ram 40 draws the swedge 62 upwardly through the cylindrical tube 10 so as to sheer the pin 76. In operation, a tubular string is assembled at the surface with the cylindrical tube 16 being at the top. The cylindrical tube 10, the ram 40 and the swedge 62 are assembled and threaded to the upper end of the cylindrical tube 16. Drill pipe is then coupled with the upper end of the ram 40 and the entire assemble is lowered to the appropriate depth. Hydraulic pressure is exerted through the drill pipe to drive the ram 40. The ram 40 draws the swedge 62 through the inner boss 18 to expand the wall of the cylindrical tube 10 outwardly into an interference relationship with an outer tubular such as a casing. Once the swedge 62 has passed across the inner boss 18, it is free. At this time, the drill pipe, the ram and the swedge can be lifted from the well. Depending on the configuration of the cylindrical tube 10 and, where applied, the outer boss 26, sealing or flow passages are effected. Further, the outside of the axial section, typically including the outer boss 26 may be wrapped with ductile metal sheet, polymer or other packing material which may be desired to place between the swedged axial section of the cylindrical tube 10 and the outer tubular.

Accordingly, an improved apparatus is disclosed for the hanging of tubulars within a well. While embodiments and applications of this invention have been shown and described, it would be apparent to those skilled in the art that many more modifications are possible without departing from the inventive concepts herein. The invention, therefore is not to be restricted except in the spirit of the appended claims.

Claims

Claims:
1. A hanger for well tubulars, comprising a cylindrical tube including an axial bearing shoulder and an axial section having an inner boss; a ram including a ram shoulder positionable abutting the axial bearing shoulder and a draw bar extendible past the axial bearing shoulder into the cylindrical tube with the ram shoulder abutting the axial bearing shoulder; a swedge fixable to the draw bar in the cylindrical tube with the inner boss being between the swedge and the axial bearing shoulder with the ram shoulder abutting the axial bearing shoulder.
2. The hanger for well tubulars of claim 1 , the axial section further having an outer boss.
3. The hanger for well tubulars of claim 2, the outer boss including axially extending grooves therethrough.
4. The hanger for well tubulars of claim 1 , the outer peripheral surface of the outer boss being continuous.
5. The hanger for well tubulars of claim 4 further comprising at least one seal extending circumferentially fully about the continuous outer peripheral surface.
6. The hanger for well tubulars of claim 1 , the inner surface of the inner boss being circumferentially continuous.
7. The hanger for well tubulars of claim 1 , the swedge including a first truncated conical surface.
8. The hanger for well tubulars of claim 7, the inner boss including a second truncated conical surface at the end of the axial section adjacent the swedge with the ram shoulder abutting the axial bearing shoulder.
9. The hanger for well tubulars of claim 1 , the cylindrical tube further including a retainer shoulder facing the axial section on the inside of the cylindrical tube with the swedge between the axial section and the retainer shoulder with the ram shoulder abutting the axial bearing shoulder, the swedge outside dimension being greater than the retainer shoulder inside dimension.
10. The hanger for well tubulars of claim 9 further comprising a second cylindrical tube coupled with the cylindrical tube and including the retainer shoulder.
11. The hanger for well tubulars of claim 1 , the ram being haudraulic and including a plurality of pistons hydraulically coupled in parallel.
12. The hanger for well tubulars of claim 1 , the axial section being spaced from either end of the cylindrical tube.
13. The hanger for well tubulars of claim 1 , the swedge including a body and a sleeve positioned about a portion of the body, the body outside dimension being no greater than and the sleeve outside dimension being greater than the inner boss inside dimension.
14. The hanger for well tubulars of claim 13, the swedge including a truncated conical surface, the body defining a portion of the truncated conical surface and the sleeve defining a portion of the truncated conical surface.
15. The hanger for well tubulars of claim 13, the sleeve being threaded onto the body.
16. The hanger for well tubulars of claim 15 further comprising a shear pin extending between the cylindrical tube and the sleeve.
PCT/US1999/012025 1998-05-28 1999-05-28 Apparatus for hanging tubulars in wells WO2001040612A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US8565998A true 1998-05-28 1998-05-28
US09/085,659 1998-05-28

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AU45018/01A AU4501801A (en) 1998-05-28 1999-05-28 Apparatus for hanging tubulars in wells

Publications (2)

Publication Number Publication Date
WO2001040612A2 true WO2001040612A2 (en) 2001-06-07
WO2001040612A3 WO2001040612A3 (en) 2002-01-03

Family

ID=22193110

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1999/012025 WO2001040612A2 (en) 1998-05-28 1999-05-28 Apparatus for hanging tubulars in wells

Country Status (2)

Country Link
AU (1) AU4501801A (en)
WO (1) WO2001040612A2 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3776307A (en) * 1972-08-24 1973-12-04 Gearhart Owen Industries Apparatus for setting a large bore packer in a well
WO1997017526A2 (en) * 1995-11-09 1997-05-15 Petroline Wellsystems Limited Downhole assembly for installing an expandable tubing

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3776307A (en) * 1972-08-24 1973-12-04 Gearhart Owen Industries Apparatus for setting a large bore packer in a well
WO1997017526A2 (en) * 1995-11-09 1997-05-15 Petroline Wellsystems Limited Downhole assembly for installing an expandable tubing

Also Published As

Publication number Publication date
AU4501801A (en) 2001-06-12
WO2001040612A3 (en) 2002-01-03

Similar Documents

Publication Publication Date Title
US6648075B2 (en) Method and apparatus for expandable liner hanger with bypass
RU2521238C2 (en) Anchor and hydraulic setting device in assembly
US6568471B1 (en) Liner hanger
AU2003252894B2 (en) High Expansion Packer
EP1399644B1 (en) Method for preparing wellbore casing for installation
US6513600B2 (en) Apparatus and method for packing or anchoring an inner tubular within a casing
US6527049B2 (en) Apparatus and method for isolating a section of tubing
JP3441072B2 (en) How to create a well in the formation
US3797864A (en) Combined metal and elastomer seal
CA2508434C (en) Expandable liner hanger system and method
US5944102A (en) High temperature high pressure retrievable packer
US7228896B2 (en) Ribbed sealing element and method of use
US6102117A (en) Retrievable high pressure, high temperature packer apparatus with anti-extrusion system
US7441606B2 (en) Expandable fluted liner hanger and packer system
US6877567B2 (en) Expansion set liner hanger and method of setting same
US8047281B2 (en) Sleeve for expandable tubular threaded connection and method of expanding tubular thereof
US5685369A (en) Metal seal well packer
US20030106698A1 (en) Apparatus and methods for separating and joining tubulars in a wellbore
US3987854A (en) Gravel packing apparatus and method
CA2459538C (en) Method for creating a polished bore receptacle
RU2293834C2 (en) System for reinforcing a section of well borehole
US6902008B2 (en) Bi-directionally boosting and internal pressure trapping packing element system
CA2462195C (en) Expandable packer
US7475735B2 (en) Tubular hanger and method of lining a drilled bore
US2189697A (en) Cement retainer

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A2

Designated state(s): AE AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): GH GM KE LS MW SD SL SZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

AK Designated states

Kind code of ref document: A3

Designated state(s): AE AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A3

Designated state(s): GH GM KE LS MW SD SL SZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

122 Ep: pct application non-entry in european phase