US20020074123A1 - Riser isolation tool - Google Patents
Riser isolation tool Download PDFInfo
- Publication number
- US20020074123A1 US20020074123A1 US09/733,128 US73312800A US2002074123A1 US 20020074123 A1 US20020074123 A1 US 20020074123A1 US 73312800 A US73312800 A US 73312800A US 2002074123 A1 US2002074123 A1 US 2002074123A1
- Authority
- US
- United States
- Prior art keywords
- sleeve
- bore
- recess
- actuator
- riser
- 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
- 238000002955 isolation Methods 0.000 title claims abstract description 15
- 238000005553 drilling Methods 0.000 claims abstract description 57
- 239000012530 fluid Substances 0.000 claims abstract description 51
- 239000002184 metal Substances 0.000 claims description 14
- 239000013536 elastomeric material Substances 0.000 claims description 5
- 238000013022 venting Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 7
- 230000009977 dual effect Effects 0.000 abstract description 6
- 238000009434 installation Methods 0.000 abstract 1
- 230000002706 hydrostatic effect Effects 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 4
- 125000006850 spacer group Chemical group 0.000 description 4
- KJLPSBMDOIVXSN-UHFFFAOYSA-N 4-[4-[2-[4-(3,4-dicarboxyphenoxy)phenyl]propan-2-yl]phenoxy]phthalic acid Chemical compound C=1C=C(OC=2C=C(C(C(O)=O)=CC=2)C(O)=O)C=CC=1C(C)(C)C(C=C1)=CC=C1OC1=CC=C(C(O)=O)C(C(O)=O)=C1 KJLPSBMDOIVXSN-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- 239000008186 active pharmaceutical agent Substances 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004260 weight control Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B17/085—Riser connections
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/001—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor specially adapted for underwater drilling
Definitions
- My invention relates generally to a marine riser system for use in the drilling of subsea wells from a floating platform on a drilling vessel. More particularly, it relates to improvements in such systems employing dual gradient drilling techniques.
- a wellhead at the ocean floor connects to the platform at the surface by a riser system which includes, from bottom to top, a blowout preventer stack on the subsea wellhead, a lower marine riser package, a riser string made up of the individual riser joints, a telescopic joint and a diverter at the vessel.
- the purpose of the riser system is to control the well at the ocean floor, to guide the drill string and other tools into and out of the well, and to return the drilling mud and cuttings back to the drilling vessel for processing.
- the weight of the riser string is often supported by a combination of buoyancy modules carried by the individual riser joints and tensioning equipment attaching the upper end of the riser string to the drilling vessel.
- the need for support includes the weight of the drilling mud column which is circulated through the drill string, out the bit, and up the annulus between the drill string and the riser back to the drilling vessel.
- the drilling mud cools, lubricates and cleans the drill bit and carries the drilled cuttings to the surface, and the mud's hydrostatic weight controls the well bore pressure.
- the mud is an engineered fluid, so that if the hydrostatic pressure is too high, the drilling mud may be lost and damage the formation. If the hydrostatic pressure is too low, formation fluids and gasses may flow into the well, where they must be controlled by the blowout preventer equipment.
- the smaller column of mud reduces the tensioning requirements of the rig as well as the quantity of drilling mud to be carried on the rig.
- the system is also environmentally more friendly than conventional drilling, and, in the case of an unintentional drive off of the drill ship, reduces the amount of mud that would be lost to the ocean floor.
- the system is shown and described in the co-pending application as enabling the returning drilling fluid to be selectively diverted into a mud return line entering upwardly to the surface along the side of the riser string.
- this diversion is accomplished by a system which includes an “isolation” tool installed between the LMRP and the lower end of the riser string so that, during dual gradient drilling, the heavy drilling mud may be isolated from the riser annulus, but which is of such construction as to enable the well bore to be easily, alternatively, and quickly entered.
- the isolation tool comprises a housing adapted to be connected as a lower continuation of the riser and having a bore through which the drill string may extend during the drilling of the well, an annular recess about the bore, and a side port below the recess for connecting the bore to a mud return line extending alongside of the riser and leading to the surface, as in the aforementioned application.
- An insert packer including a sleeve of elastomeric material is adapted to be lowered into and raised from a landed position in the bore opposite an actuator within the housing recess having a sleeve of elastomeric material which, when retracted, occupies a position in which the insert packer may be removed, forming a continuation of the bore so as to receive a drill string therethrough.
- the actuator sleeve is responsive to the supply of control fluid thereto from an outside source to engage and contract the sleeve of the insert packer about the drill string, so that the drilling fluid flowing upwardly in the annulus between the riser and drill string is directed into the side port in the housing bore.
- the insert packer sleeve is free to expand to fully open the bore and the insert to be removed.
- the actuator sleeve has metal rings at both ends to seal with the housing recess in order to contain the control fluid.
- the insert packer sleeve also includes upper and lower metal rings, and a pin is mounted on the housing for extension inwardly of the bore to support the lower ring of the insert packer opposite the actuator sleeve. More particularly, one of the rings has an outer recess and another pin is mounted in the housing for extension inwardly of the bore to engage in the recess to hold the packer insert down in the landed position.
- the insert packer in another embodiment of the invention adapted for use when the drilling string is rotating, includes a carrier body having a recess about its inner side, and an elastomeric sleeve having a bearing ring at each end slidably rotatable within the body recess for rotation with the drill string when closed thereabout.
- the actuator includes three vertically spaced elastomeric sleeves within the recess of the housing body and separated by spacer rings in position to be contracted by control fluid supplied from an outside source to close about the outside of the carrier body, and thus form upper and lower fluid pressure chambers.
- Each of the spacer rings has a port therethrough leading to its adjacent pressure chamber, and the carrier body and bearing rings have passageways connecting at opposite ends to the upper and lower pressure chambers on the outer side of the sleeve within the recess of the carrier body, whereby control fluid may be supplied from an outside source into one port and out the other.
- control fluid will circulate through the passageways in order to contract the actuator sleeve about the insert packer sleeve and thus contract it about the drill pipe.
- Due to its rotating support within the carrier body the sleeve of the insert packer is free to rotate with the pipe. The relief of such control fluid permits the sleeve of the actuator, and thus the sleeve of the insert packer, to expand to permit the insert packer to be retrieved.
- the carrier body has a main portion in which one end of the recess is formed, and a retainer portion removably connected to the main portion and on which the other end of the recess is formed, whereby the sleeve and bearing rings of the insert packer may be installed or removed upon removal of the retainer portion.
- a pin is mounted on the housing for movement inwardly of the bore to support the carrier body, and there is a recess in the outer side of the body into which another pin mounted on the housing body is adapted to be moved to hold the packer insert in landed position and out of the recess to free the carrier body and insert packer sleeve for removal from the housing bore.
- FIG. 1 is a side view of the drilling system extending between a drill ship and the subsea wellhead at the ocean floor;
- FIG. 2 is a vertical sectional view of the first mentioned embodiment of the riser isolation tool on the upper end of the lower marine riser package, with the insert packer sleeve closed about a drill string on the right side to divert drill fluid into a side outlet and removed from the left side to permit conventional drilling;
- FIG. 3 is an enlarged sectional view of the isolation tool of FIG. 2 including arrows illustrating fluid paths of the control fluid for operation of the insert packer sleeve as well as the pin for selectively holding the insert packer down in landed position;
- FIG. 4 is another view of the isolation tool of FIGS. 2 and 3 with a diagrammatic illustration of the control systems within a pod of a blowout preventer control system for operating both the insert packer and support and hold down pins;
- FIG. 5 is a sectional view of the rotating embodiment of the isolation tool and including arrows illustrating fluid paths of the operating fluid system therefor;
- FIG. 6 is a another sectional view of the tool of FIG. 5 and also showing the control systems disposed within a blowout preventer pod;
- FIGS. 7A and 7B are enlarged sectional views of the left and right sides respectively of the tool of FIGS. 5 and 6 and showing, respectively, positions of its insert packer and actuator during successive stages of operation;
- FIG. 8 is a detailed sectional view of the running tool for the insert packer, with one side in elevation and the other is section.
- the drilling riser system is shown diagrammatically in FIG. 1 to include, from top to bottom, a diverter system D aboard the drill ship, a riser tensioner RT, a telescopic joint TJ, a middle flex joint MFJ, and a drilling riser DR made up of individual riser joints through which a drill string DS extends into the well through a blowout preventer on the ocean floor.
- the lower end of the riser is connected by a lower marine riser package LMRP to the upper end of the subsea wellhead by a blowout preventer BOP stack.
- buoyancy modules BM are mounted on at least certain of the riser joints so as to support the drilling riser, along with riser tensioner on the vessel.
- the isolation tool IT installed on the LMRP includes a tubular housing H having a bore 24 connecting to the lower end of the drilling riser with the bore of the LMRP below it.
- An insert packer IP is adapted to be installed within the bore of the housing in position to be contracted into sealing engagement about the drill string DS extending therethrough, as shown on the right side of FIG. 2.
- the insert packer is shown removed from the well bore of the housing on the left side of FIG. 2, whereby the bore is fully open for normal drilling operations.
- the insert packer IP comprises an elastomeric sleeve 25 having metal rings 26 and 27 on the upper and lower ends which forms a smooth continuation of the housing bore in the expanded portion.
- the insert packer IP is moved between contracted and expanded positions by an actuator comprising an elastomeric sleeve 36 having metal rings 46 at its opposite end and received within the recess R in the bore of the housing to surround the insert packer IP installed in the housing bore.
- the upper end of the housing recess R is closed by a flange 39 at its upper end which may be removed to permit the actuator to be installed or replaced for repair.
- a side port 30 formed in a main body portion beneath the recess connects with a mud return line so that, as will be described, when the insert packer is closed, drilling mud may be diverted into it.
- the inner diameter of the expanded actuator sleeve 36 opens the annulus about a drill string to form a smooth continuation of the housing bore 24 .
- the housing of the IT also supports the bending and tension load requirements of the riser system.
- the removable insert packer is run in or retrieved from the housing by a running tool RT (See FIG. 8) that is added to the drill pipe string DS, as described to follow.
- a set of hydraulically operated pins 48 or bolts is carried by the housing so that, when moved inwardly, they provide a landing shoulder in the housing bore to position the insert packer opposite the actuator.
- a second set of hydraulically operated pins 58 carried by the housing fit one adapted to be moved into an annular groove 56 about the insert packer to lock it in place to prevent its up or down movement in the bore. An upward pull on the drill string can confirm the lock down.
- the hold down pins are, of course, retracted as the insert is lowered onto or raised from the support pins. When the support pins are withdrawn, shear pins SP (FIG. 8) between the running tool and insert packer may be sheared allowing the drill string to continue to the bottom of the hole and commence drilling.
- the annulus 28 between the housing bore and the insert packer may be sealed off by contraction of the actuator sleeve 36 by means of fluid pressure from accumulator 44 supplied to the recess about the sleeve through port 42 to close about the drill string to seal off well fluid in the annulus above and below it.
- the pressure is such as to allow the pipe and its tool joints to pass through it while maintaining a seal (stripping) in either direction.
- the actuator 36 also includes metal rings 46 at both ends of sleeve 36 , each carrying a seal ring thereabout to seal off the recess to contain actuating fluid in the recess.
- FIG. 4 shows the tool IT of FIGS. 1 to 3 with a typical hydraulic control system mounted in a subsea control pods the supply end exhaust of control fluid.
- the system includes control valve CV, a remotely settable pressure regulator R, and an accumulator 44 located near or on the IT to control flow to and from the actuator in the recess in the body bore as well as to and from operator for pins 48 and 58 .
- the pressure applied through line 42 to the outer diameter of the actuator sleeve 36 displaces it inwardly to close the actuator sleeve on the sleeve of the insert packing. Additional pressure applied to the actuator sleeve displaces the insert packer sleeve inwardly causing it to seal on the drill pipe.
- the accumulator allows the insert packer to open up easily to allow tool joints to be stripped though it.
- valves 75 A and 75 B control the supply and return of control fluid to and from operators for pins 48 and 58 .
- FIGS. 5 and 6 show the rotating form RIT of the isolation tool which accommodates pipe rotation, and includes an actuator having three annular elastomeric sleeves AP 1 , AP 2 , and AP 3 mounted in the recess R of its housing bore in position to be hydraulically energized to engage and seal against a rotating insert packer. As shown in FIGS. 7A and 7B, these sleeves, when so energized, isolate two annular bands between the actuator which connect with an outside service of control fluid through lines for the operation of the insert packer.
- the three annular sleeves AP 1 , AP 2 , and AP 3 are separated by metal spacer rings 37 and 38 between them are removably retained in recess R of housing by an upper adapter flange AP.
- Rings 31 A are disposed above and below packer AP 1
- rings 31 C above and below annular packer AP carry seal rings which engage the recess to isolate the bands from one another.
- the rotating insert packer RIP lands on the inner ends of the positioning pins PP when extended, and lock down pins LP are, when extended, received in groove G about a carrier body C of the packer insert to hold it opposite the actuator.
- the carrier body has a recess R to receive an elastomeric sleeve ES having metal bearing rings 41 and 42 at its ends and rotatable with drill pipe within the carrier within the carrier body recess.
- control valve 79 A within the control pod enables hydraulic pressure to be supplied to or exhausted from ports 36 to control the movement of sleeve segments AP 1 , AP 2 , and AP 3 toward or from the carrier body C of the insert packer.
- the rotating insert packer sleeve has bearings 41 at each end of the body for rotation within tapered shoulders at both ends on the carrier recess. Seal rings 40 seal between the metal rings of the RIP at both ends above and below the bearings in passageways shown to connect with the outer side of the insert packer between them.
- control fluid is supplied through ports 36 to the bands about the outside of the rotating actuator sleeve segments. Fluid from another source is then introduced through ports in ring 37 into annular bands between sleeves AP 1 and AP 2 through passageways in the carrier body and between it and the sleeve within its recess, and then returns to the operating system through the port in the ring 38 to a passageway through the carrier body into an annulus. Control fluid thus flows through passageways between the carrier body recess and bearing rings on the ends of insert packer sleeves to circulate through lines 50 A and 50 B to the back of the insert packer sleeve to close it on the drill pipe, as shown in FIG.
- Control valve CV in the control pod enables operating fluid to pass, selectively moving the insert packer sleeve between the positions of FIGS. 7A and 7B.
- the control pod also contains two valves 77 A and 77 B for controlling operators of the locking and positioning pins, in an obvious manner.
- the system also contains a remotely settable back pressure regulator.
- hydraulic pressure applied to the AP 1 , AP 2 and AP 3 rings displaces them against the insert packer carrier body sealing across the annulus between insert packer and actuator.
- Control fluid is applied to the rotating insert packer and regulated by the back pressure regulator to move the insert packer sleeve inward causing it to seal on the drill pipe.
- the flow of control fluid between the insert packer and carrier body is remotely regulated to meet the cooling requirements of the tool.
- the accumulator allows the tool joints to be stripped through.
- the isolation tools enable drilling fluid from the annulus to be diverted into the mud return lines as shown in FIG. 2 to be pumped to the surface during dual gradient drilling.
- nitrogen or other low density media may be injected into the mud return line.
- the tool may be operated to permit conventional drilling.
- the running tool RT shown in FIG. 8 is added to the drill string for use in running or pulling the insert packer of either type of isolation tool. Thus, no special trips are required to run or pull them.
- the fluted design facilitates horizontal drilling, and is run and retrieved on a small external upset 57 on the tool.
- the insert is secured to tool by shear pins SP, which are threaded through the insert metal rings into holes located in the tool.
- the insert is run in on drill pipe and landed on the inner ends of the extended positioning pins.
- the locking pins are engaged and an over pull taken to insure lock down.
- the positioning pins are then retracted and the weight of the drill string used to break the shear pins to permit lowering of the string.
- the insert is retrieved on the drill string by retracting the hold down pins after the running tool reaches the insert.
- the running tool and insert bore would be designed for the drill string being used.
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
Description
- My invention relates generally to a marine riser system for use in the drilling of subsea wells from a floating platform on a drilling vessel. More particularly, it relates to improvements in such systems employing dual gradient drilling techniques.
- This application claims the benefit of the filing date of my Provisional Application No. 60/169,878, filed Dec. 12, 1999, and assigned to the assignee of the present application.
- In the conventional drilling of a subsea well, a wellhead at the ocean floor connects to the platform at the surface by a riser system which includes, from bottom to top, a blowout preventer stack on the subsea wellhead, a lower marine riser package, a riser string made up of the individual riser joints, a telescopic joint and a diverter at the vessel. The purpose of the riser system is to control the well at the ocean floor, to guide the drill string and other tools into and out of the well, and to return the drilling mud and cuttings back to the drilling vessel for processing.
- The weight of the riser string is often supported by a combination of buoyancy modules carried by the individual riser joints and tensioning equipment attaching the upper end of the riser string to the drilling vessel. The need for support includes the weight of the drilling mud column which is circulated through the drill string, out the bit, and up the annulus between the drill string and the riser back to the drilling vessel.
- The drilling mud cools, lubricates and cleans the drill bit and carries the drilled cuttings to the surface, and the mud's hydrostatic weight controls the well bore pressure. The mud is an engineered fluid, so that if the hydrostatic pressure is too high, the drilling mud may be lost and damage the formation. If the hydrostatic pressure is too low, formation fluids and gasses may flow into the well, where they must be controlled by the blowout preventer equipment.
- In deep subsea wells, it is difficult to control the hydrostatic head of the drilling mud, and small changes in the density of the drilling fluid can cause large differences in downhole pressure. In one procedure proposed to address this problem, known as riserless drilling, the drilling mud is returned to the drilling vessel by being either pumped and/or gas lifted from the subsea BOP to the surface. This is an attempt to remove the effects of the hydrostatic head from the top of the subsea wellhead, and is usually accomplished by having a second mud return riser in addition to the annulus within the drilling riserthrough which the drill string extends. Since most drilling vessels can only handle one riser at a time, this is a time consuming and difficult task.
- Another procedure is known as underbalanced or dual gradient drilling in which nitrogen gas is added to the drilling fluid at the subsea level. The density of the aired up mud can then be controlled in an attempt to give the desired hydrostatic head at the subsea wellhead. In this system, the mud also returns to the drilling vessel through the annulus between the drill string and the riser, and a rotating blowout preventer is required at the surface to contain the gas in the annulus. In true underbalanced or dual gradient drilling, the pressure is normally less than the formation pressure. Under these conditions, the rate of drill penetration into the formation is greatly increased.
- A co-pending patent application, serial number 09/618,883, filed Jul. 18, 2000, entitled “System and Method for Drilling Deep Water Subsea Wells”, and assigned the assignee of this application, discloses a procedure for handling the returning drilling mud without the shortcomings of the above described procedures. More particularly, it not only avoids the need for a second riser, as well as the obvious risks of collapse of the riser pipe attendant to underbalanced drilling, but also reduces the flow area available to the returning mud to thereby increase the velocity of the mud and thus aid in removing the cuttings from the well bore. The smaller column of mud reduces the tensioning requirements of the rig as well as the quantity of drilling mud to be carried on the rig. The system is also environmentally more friendly than conventional drilling, and, in the case of an unintentional drive off of the drill ship, reduces the amount of mud that would be lost to the ocean floor.
- More particularly, the system is shown and described in the co-pending application as enabling the returning drilling fluid to be selectively diverted into a mud return line entering upwardly to the surface along the side of the riser string. Thus, in accordance with my invention, this diversion is accomplished by a system which includes an “isolation” tool installed between the LMRP and the lower end of the riser string so that, during dual gradient drilling, the heavy drilling mud may be isolated from the riser annulus, but which is of such construction as to enable the well bore to be easily, alternatively, and quickly entered.
- Thus, in accordance with its illustrated and preferred embodiments, the isolation tool comprises a housing adapted to be connected as a lower continuation of the riser and having a bore through which the drill string may extend during the drilling of the well, an annular recess about the bore, and a side port below the recess for connecting the bore to a mud return line extending alongside of the riser and leading to the surface, as in the aforementioned application. An insert packer including a sleeve of elastomeric material is adapted to be lowered into and raised from a landed position in the bore opposite an actuator within the housing recess having a sleeve of elastomeric material which, when retracted, occupies a position in which the insert packer may be removed, forming a continuation of the bore so as to receive a drill string therethrough. When the insert packer is in place, the actuator sleeve is responsive to the supply of control fluid thereto from an outside source to engage and contract the sleeve of the insert packer about the drill string, so that the drilling fluid flowing upwardly in the annulus between the riser and drill string is directed into the side port in the housing bore. In response to the exhaust of the control fluid, the insert packer sleeve is free to expand to fully open the bore and the insert to be removed.
- In one form, the actuator sleeve has metal rings at both ends to seal with the housing recess in order to contain the control fluid. The insert packer sleeve also includes upper and lower metal rings, and a pin is mounted on the housing for extension inwardly of the bore to support the lower ring of the insert packer opposite the actuator sleeve. More particularly, one of the rings has an outer recess and another pin is mounted in the housing for extension inwardly of the bore to engage in the recess to hold the packer insert down in the landed position.
- In another embodiment of the invention adapted for use when the drilling string is rotating, the insert packer includes a carrier body having a recess about its inner side, and an elastomeric sleeve having a bearing ring at each end slidably rotatable within the body recess for rotation with the drill string when closed thereabout. More particularly, the actuator includes three vertically spaced elastomeric sleeves within the recess of the housing body and separated by spacer rings in position to be contracted by control fluid supplied from an outside source to close about the outside of the carrier body, and thus form upper and lower fluid pressure chambers.
- Each of the spacer rings has a port therethrough leading to its adjacent pressure chamber, and the carrier body and bearing rings have passageways connecting at opposite ends to the upper and lower pressure chambers on the outer side of the sleeve within the recess of the carrier body, whereby control fluid may be supplied from an outside source into one port and out the other. Thus, when the actuator sleeves are contracted about the carrier body, control fluid will circulate through the passageways in order to contract the actuator sleeve about the insert packer sleeve and thus contract it about the drill pipe. Due to its rotating support within the carrier body, the sleeve of the insert packer is free to rotate with the pipe. The relief of such control fluid permits the sleeve of the actuator, and thus the sleeve of the insert packer, to expand to permit the insert packer to be retrieved.
- Preferably, the carrier body has a main portion in which one end of the recess is formed, and a retainer portion removably connected to the main portion and on which the other end of the recess is formed, whereby the sleeve and bearing rings of the insert packer may be installed or removed upon removal of the retainer portion. More particularly, a pin is mounted on the housing for movement inwardly of the bore to support the carrier body, and there is a recess in the outer side of the body into which another pin mounted on the housing body is adapted to be moved to hold the packer insert in landed position and out of the recess to free the carrier body and insert packer sleeve for removal from the housing bore.
- With reference now to the drawings, wherein like reference characters are used throughout to designate the like parts:
- FIG. 1 is a side view of the drilling system extending between a drill ship and the subsea wellhead at the ocean floor;
- FIG. 2 is a vertical sectional view of the first mentioned embodiment of the riser isolation tool on the upper end of the lower marine riser package, with the insert packer sleeve closed about a drill string on the right side to divert drill fluid into a side outlet and removed from the left side to permit conventional drilling;
- FIG. 3 is an enlarged sectional view of the isolation tool of FIG. 2 including arrows illustrating fluid paths of the control fluid for operation of the insert packer sleeve as well as the pin for selectively holding the insert packer down in landed position;
- FIG. 4 is another view of the isolation tool of FIGS. 2 and 3 with a diagrammatic illustration of the control systems within a pod of a blowout preventer control system for operating both the insert packer and support and hold down pins;
- FIG. 5 is a sectional view of the rotating embodiment of the isolation tool and including arrows illustrating fluid paths of the operating fluid system therefor;
- FIG. 6 is a another sectional view of the tool of FIG. 5 and also showing the control systems disposed within a blowout preventer pod;
- FIGS. 7A and 7B are enlarged sectional views of the left and right sides respectively of the tool of FIGS. 5 and 6 and showing, respectively, positions of its insert packer and actuator during successive stages of operation; and
- FIG. 8 is a detailed sectional view of the running tool for the insert packer, with one side in elevation and the other is section.
- With reference to the details of the above described drawings, the drilling riser system is shown diagrammatically in FIG. 1 to include, from top to bottom, a diverter system D aboard the drill ship, a riser tensioner RT, a telescopic joint TJ, a middle flex joint MFJ, and a drilling riser DR made up of individual riser joints through which a drill string DS extends into the well through a blowout preventer on the ocean floor. The lower end of the riser is connected by a lower marine riser package LMRP to the upper end of the subsea wellhead by a blowout preventer BOP stack. As shown, buoyancy modules BM are mounted on at least certain of the riser joints so as to support the drilling riser, along with riser tensioner on the vessel.
- As shown in FIG. 2, for example, the isolation tool IT installed on the LMRP includes a tubular housing H having a
bore 24 connecting to the lower end of the drilling riser with the bore of the LMRP below it. An insert packer IP is adapted to be installed within the bore of the housing in position to be contracted into sealing engagement about the drill string DS extending therethrough, as shown on the right side of FIG. 2. The insert packer is shown removed from the well bore of the housing on the left side of FIG. 2, whereby the bore is fully open for normal drilling operations. - The insert packer IP comprises an
elastomeric sleeve 25 havingmetal rings elastomeric sleeve 36 havingmetal rings 46 at its opposite end and received within the recess R in the bore of the housing to surround the insert packer IP installed in the housing bore. The upper end of the housing recess R is closed by aflange 39 at its upper end which may be removed to permit the actuator to be installed or replaced for repair. As above mentioned, aside port 30 formed in a main body portion beneath the recess connects with a mud return line so that, as will be described, when the insert packer is closed, drilling mud may be diverted into it. - With the insert removed, the inner diameter of the expanded
actuator sleeve 36 opens the annulus about a drill string to form a smooth continuation of thehousing bore 24. In either mode, the housing of the IT also supports the bending and tension load requirements of the riser system. The removable insert packer is run in or retrieved from the housing by a running tool RT (See FIG. 8) that is added to the drill pipe string DS, as described to follow. - As shown in FIG. 3, a set of hydraulically operated
pins 48 or bolts is carried by the housing so that, when moved inwardly, they provide a landing shoulder in the housing bore to position the insert packer opposite the actuator. A second set of hydraulically operatedpins 58 carried by the housing fit one adapted to be moved into anannular groove 56 about the insert packer to lock it in place to prevent its up or down movement in the bore. An upward pull on the drill string can confirm the lock down. The hold down pins are, of course, retracted as the insert is lowered onto or raised from the support pins. When the support pins are withdrawn, shear pins SP (FIG. 8) between the running tool and insert packer may be sheared allowing the drill string to continue to the bottom of the hole and commence drilling. - The
annulus 28 between the housing bore and the insert packer may be sealed off by contraction of theactuator sleeve 36 by means of fluid pressure fromaccumulator 44 supplied to the recess about the sleeve throughport 42 to close about the drill string to seal off well fluid in the annulus above and below it. The pressure is such as to allow the pipe and its tool joints to pass through it while maintaining a seal (stripping) in either direction. Theactuator 36 also includes metal rings 46 at both ends ofsleeve 36, each carrying a seal ring thereabout to seal off the recess to contain actuating fluid in the recess. - FIG. 4 shows the tool IT of FIGS.1 to 3 with a typical hydraulic control system mounted in a subsea control pods the supply end exhaust of control fluid. The system includes control valve CV, a remotely settable pressure regulator R, and an
accumulator 44 located near or on the IT to control flow to and from the actuator in the recess in the body bore as well as to and from operator forpins line 42 to the outer diameter of theactuator sleeve 36 displaces it inwardly to close the actuator sleeve on the sleeve of the insert packing. Additional pressure applied to the actuator sleeve displaces the insert packer sleeve inwardly causing it to seal on the drill pipe. The accumulator allows the insert packer to open up easily to allow tool joints to be stripped though it. As also shown in schematically in FIG. 4,valves pins - FIGS. 5 and 6 show the rotating form RIT of the isolation tool which accommodates pipe rotation, and includes an actuator having three annular elastomeric sleeves AP1, AP2, and AP3 mounted in the recess R of its housing bore in position to be hydraulically energized to engage and seal against a rotating insert packer. As shown in FIGS. 7A and 7B, these sleeves, when so energized, isolate two annular bands between the actuator which connect with an outside service of control fluid through lines for the operation of the insert packer.
- More particularly, the three annular sleeves AP1, AP2, and AP3 are separated by metal spacer rings 37 and 38 between them are removably retained in recess R of housing by an upper adapter flange AP.
Rings 31A are disposed above and below packer AP1, rings 31 B above and below packer AP2, and rings 31C above and below annular packer AP carry seal rings which engage the recess to isolate the bands from one another. - The rotating insert packer RIP lands on the inner ends of the positioning pins PP when extended, and lock down pins LP are, when extended, received in groove G about a carrier body C of the packer insert to hold it opposite the actuator. The carrier body has a recess R to receive an elastomeric sleeve ES having metal bearing rings41 and 42 at its ends and rotatable with drill pipe within the carrier within the carrier body recess. As shown in FIG. 6,
control valve 79A within the control pod enables hydraulic pressure to be supplied to or exhausted fromports 36 to control the movement of sleeve segments AP1, AP2, and AP3 toward or from the carrier body C of the insert packer. When the sleeves are moved inwardly, they form the two annular bands about the carrier body, so that control fluid is confined to pass completely around the insert position. The rotating insert packer sleeve hasbearings 41 at each end of the body for rotation within tapered shoulders at both ends on the carrier recess. Seal rings 40 seal between the metal rings of the RIP at both ends above and below the bearings in passageways shown to connect with the outer side of the insert packer between them. - With spacer rings37 and 38 are disposed between metal rings at opposite ends of adjacent sleeve segments, control fluid is supplied through
ports 36 to the bands about the outside of the rotating actuator sleeve segments. Fluid from another source is then introduced through ports inring 37 into annular bands between sleeves AP1 and AP2 through passageways in the carrier body and between it and the sleeve within its recess, and then returns to the operating system through the port in thering 38 to a passageway through the carrier body into an annulus. Control fluid thus flows through passageways between the carrier body recess and bearing rings on the ends of insert packer sleeves to circulate throughlines valves - Since the rotating bearing rings of the insert packer are swept around with the rotating pipe, they travel over freshly wetted and cooled surfaces. Composite bearings may be used in the passageways as well as needle bearings or tapered roller bearings. The size of the packer, within the insert, is chosen to minimize the heat generated in rotation.
- To summarize briefly, hydraulic pressure applied to the AP1, AP2 and AP3 rings displaces them against the insert packer carrier body sealing across the annulus between insert packer and actuator. Control fluid is applied to the rotating insert packer and regulated by the back pressure regulator to move the insert packer sleeve inward causing it to seal on the drill pipe. The flow of control fluid between the insert packer and carrier body is remotely regulated to meet the cooling requirements of the tool. The accumulator allows the tool joints to be stripped through.
- As more fully described in the above mentioned pending application, the isolation tools enable drilling fluid from the annulus to be diverted into the mud return lines as shown in FIG. 2 to be pumped to the surface during dual gradient drilling. As also shown in FIG. 2, nitrogen or other low density media may be injected into the mud return line. Alternatively, the tool may be operated to permit conventional drilling.
- The running tool RT shown in FIG. 8 is added to the drill string for use in running or pulling the insert packer of either type of isolation tool. Thus, no special trips are required to run or pull them. There are
spiral flutes 56 about the tool to allow well fluid to pass by the insert packer P as it is run or retrieved. The fluted design facilitates horizontal drilling, and is run and retrieved on a small external upset 57 on the tool. The insert is secured to tool by shear pins SP, which are threaded through the insert metal rings into holes located in the tool. - The insert is run in on drill pipe and landed on the inner ends of the extended positioning pins. The locking pins are engaged and an over pull taken to insure lock down. The positioning pins are then retracted and the weight of the drill string used to break the shear pins to permit lowering of the string. The insert is retrieved on the drill string by retracting the hold down pins after the running tool reaches the insert. The running tool and insert bore would be designed for the drill string being used.
- It will be understood that certain features and subcombinations are of utility and may be employed without reference to other features and subcombinations. This is contemplated by and is within the scope of the claims.
- As many possible embodiments may be made of the invention without departing from the scope thereof, it is to be understood that all matter herein set forth or shown in the accompanying drawings is to be interpreted as illustrative and not in a limiting sense.
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/733,128 US6450262B1 (en) | 1999-12-09 | 2000-12-08 | Riser isolation tool |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US16987899P | 1999-12-09 | 1999-12-09 | |
US09/733,128 US6450262B1 (en) | 1999-12-09 | 2000-12-08 | Riser isolation tool |
Publications (2)
Publication Number | Publication Date |
---|---|
US20020074123A1 true US20020074123A1 (en) | 2002-06-20 |
US6450262B1 US6450262B1 (en) | 2002-09-17 |
Family
ID=26865473
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/733,128 Expired - Lifetime US6450262B1 (en) | 1999-12-09 | 2000-12-08 | Riser isolation tool |
Country Status (1)
Country | Link |
---|---|
US (1) | US6450262B1 (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090025936A1 (en) * | 2004-02-26 | 2009-01-29 | Des Enhanced Recovery Limited | Connection system for subsea flow interface equipment |
WO2009051620A1 (en) * | 2007-10-18 | 2009-04-23 | Williams John R | Stripper rubber with integral retracting retention member connection apparatus |
US7992643B2 (en) | 2003-05-31 | 2011-08-09 | Cameron Systems (Ireland) Limited | Apparatus and method for recovering fluids from a well and/or injecting fluids into a well |
US8066063B2 (en) | 2006-09-13 | 2011-11-29 | Cameron International Corporation | Capillary injector |
US8104541B2 (en) | 2006-12-18 | 2012-01-31 | Cameron International Corporation | Apparatus and method for processing fluids from a well |
WO2011104279A3 (en) * | 2010-02-24 | 2012-05-03 | Managed Pressure Operations Pte. Limited | Drilling system and method of operating a drilling system |
US8297360B2 (en) | 2006-12-18 | 2012-10-30 | Cameron International Corporation | Apparatus and method for processing fluids from a well |
US9500053B2 (en) | 2013-12-17 | 2016-11-22 | Managed Pressure Operations Pte. Ltd. | Drilling system and method of operating a drilling system |
US9506300B2 (en) | 2011-04-21 | 2016-11-29 | Managed Pressure Operations Pte Ltd. | Slip joint and method of operating a slip joint |
WO2018212823A1 (en) * | 2017-05-17 | 2018-11-22 | Weatherford Technology Holdings, Llc | Pressure control device for use with a subterranean well |
US10435966B2 (en) | 2013-12-17 | 2019-10-08 | Managed Pressure Operations Pte Ltd | Apparatus and method for degassing drilling fluids |
CN115012864A (en) * | 2022-06-02 | 2022-09-06 | 中国石油化工股份有限公司 | Device for replacing wellhead of gas well without killing well |
Families Citing this family (34)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9930450D0 (en) * | 1999-12-23 | 2000-02-16 | Eboroil Sa | Subsea well intervention vessel |
US6843331B2 (en) * | 2001-02-15 | 2005-01-18 | De Boer Luc | Method and apparatus for varying the density of drilling fluids in deep water oil drilling applications |
US7992655B2 (en) * | 2001-02-15 | 2011-08-09 | Dual Gradient Systems, Llc | Dual gradient drilling method and apparatus with multiple concentric drill tubes and blowout preventers |
WO2004018832A1 (en) * | 2002-08-21 | 2004-03-04 | Hoeiland Oddgeir | A method and device by a displacement tool |
US7836946B2 (en) | 2002-10-31 | 2010-11-23 | Weatherford/Lamb, Inc. | Rotating control head radial seal protection and leak detection systems |
US6938707B2 (en) * | 2003-05-15 | 2005-09-06 | Chevron U.S.A. Inc. | Method and system for minimizing circulating fluid return losses during drilling of a well bore |
US7032691B2 (en) * | 2003-10-30 | 2006-04-25 | Stena Drilling Ltd. | Underbalanced well drilling and production |
US8826988B2 (en) | 2004-11-23 | 2014-09-09 | Weatherford/Lamb, Inc. | Latch position indicator system and method |
US7926593B2 (en) | 2004-11-23 | 2011-04-19 | Weatherford/Lamb, Inc. | Rotating control device docking station |
BR122017010168B1 (en) * | 2005-10-20 | 2018-06-26 | Transocean Sedco Forex Ventures Ltd. | METHOD TO CONTROL PRESSURE AND / OR DENSITY OF A DRILLING FLUID |
CA2867384C (en) | 2006-11-07 | 2016-06-07 | Charles R. Orbell | Method of drilling by installing multiple annular seals between a riser and a string |
US7997345B2 (en) | 2007-10-19 | 2011-08-16 | Weatherford/Lamb, Inc. | Universal marine diverter converter |
US8286734B2 (en) | 2007-10-23 | 2012-10-16 | Weatherford/Lamb, Inc. | Low profile rotating control device |
US8844652B2 (en) | 2007-10-23 | 2014-09-30 | Weatherford/Lamb, Inc. | Interlocking low profile rotating control device |
US8281875B2 (en) * | 2008-12-19 | 2012-10-09 | Halliburton Energy Services, Inc. | Pressure and flow control in drilling operations |
US8322432B2 (en) | 2009-01-15 | 2012-12-04 | Weatherford/Lamb, Inc. | Subsea internal riser rotating control device system and method |
US9359853B2 (en) | 2009-01-15 | 2016-06-07 | Weatherford Technology Holdings, Llc | Acoustically controlled subsea latching and sealing system and method for an oilfield device |
US9567843B2 (en) * | 2009-07-30 | 2017-02-14 | Halliburton Energy Services, Inc. | Well drilling methods with event detection |
US8347983B2 (en) | 2009-07-31 | 2013-01-08 | Weatherford/Lamb, Inc. | Drilling with a high pressure rotating control device |
US8746348B2 (en) * | 2010-02-18 | 2014-06-10 | Chevron U.S.A. Inc. | Apparatus, system and method for releasing fluids from a subsea riser |
US8347982B2 (en) | 2010-04-16 | 2013-01-08 | Weatherford/Lamb, Inc. | System and method for managing heave pressure from a floating rig |
US8201628B2 (en) | 2010-04-27 | 2012-06-19 | Halliburton Energy Services, Inc. | Wellbore pressure control with segregated fluid columns |
US8820405B2 (en) | 2010-04-27 | 2014-09-02 | Halliburton Energy Services, Inc. | Segregating flowable materials in a well |
US9175542B2 (en) | 2010-06-28 | 2015-11-03 | Weatherford/Lamb, Inc. | Lubricating seal for use with a tubular |
GB2549210B (en) | 2011-03-23 | 2018-07-25 | Managed Pressure Operations | Blow out preventer |
US9249638B2 (en) | 2011-04-08 | 2016-02-02 | Halliburton Energy Services, Inc. | Wellbore pressure control with optimized pressure drilling |
MY168333A (en) | 2011-04-08 | 2018-10-30 | Halliburton Energy Services Inc | Automatic standpipe pressure control in drilling |
US9080407B2 (en) | 2011-05-09 | 2015-07-14 | Halliburton Energy Services, Inc. | Pressure and flow control in drilling operations |
US9670755B1 (en) * | 2011-06-14 | 2017-06-06 | Trendsetter Engineering, Inc. | Pump module systems for preventing or reducing release of hydrocarbons from a subsea formation |
EP2753787A4 (en) | 2011-09-08 | 2016-07-13 | Halliburton Energy Services Inc | High temperature drilling with lower temperature rated tools |
WO2013123141A2 (en) | 2012-02-14 | 2013-08-22 | Chevron U.S.A. Inc. | Systems and methods for managing pressure in a wellbore |
US9441426B2 (en) | 2013-05-24 | 2016-09-13 | Oil States Industries, Inc. | Elastomeric sleeve-enabled telescopic joint for a marine drilling riser |
EP3128120B1 (en) * | 2014-05-13 | 2021-08-11 | Weatherford Technology Holdings, LLC | Marine diverter system |
WO2018031296A1 (en) * | 2016-08-11 | 2018-02-15 | Noble Drilling Services Inc. | Method for assembling and disassembling marine riser and auxiliary lines and well pressure control system |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4632188A (en) * | 1985-09-04 | 1986-12-30 | Atlantic Richfield Company | Subsea wellhead apparatus |
GB8925075D0 (en) * | 1989-11-07 | 1989-12-28 | British Petroleum Co Plc | Sub-sea well injection system |
US6325159B1 (en) * | 1998-03-27 | 2001-12-04 | Hydril Company | Offshore drilling system |
US6230824B1 (en) * | 1998-03-27 | 2001-05-15 | Hydril Company | Rotating subsea diverter |
-
2000
- 2000-12-08 US US09/733,128 patent/US6450262B1/en not_active Expired - Lifetime
Cited By (37)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8167049B2 (en) | 2002-07-16 | 2012-05-01 | Cameron Systems (Ireland) Limited | Apparatus and method for recovering fluids from a well and/or injecting fluids into a well |
US10107069B2 (en) | 2002-07-16 | 2018-10-23 | Onesubsea Ip Uk Limited | Apparatus and method for recovering fluids from a well and/or injecting fluids into a well |
US9556710B2 (en) | 2002-07-16 | 2017-01-31 | Onesubsea Ip Uk Limited | Apparatus and method for recovering fluids from a well and/or injecting fluids into a well |
US8746332B2 (en) | 2002-07-16 | 2014-06-10 | Cameron Systems (Ireland) Limited | Apparatus and method for recovering fluids from a well and/or injecting fluids into a well |
US8733436B2 (en) | 2002-07-16 | 2014-05-27 | Cameron Systems (Ireland) Limited | Apparatus and method for recovering fluids from a well and/or injecting fluids into a well |
US8469086B2 (en) | 2002-07-16 | 2013-06-25 | Cameron Systems (Ireland) Limited | Apparatus and method for recovering fluids from a well and/or injecting fluids into a well |
US8573306B2 (en) | 2003-05-31 | 2013-11-05 | Cameron Systems (Ireland) Limited | Apparatus and method for recovering fluids from a well and/or injecting fluids into a well |
US7992633B2 (en) | 2003-05-31 | 2011-08-09 | Cameron Systems (Ireland) Limited | Apparatus and method for recovering fluids from a well and/or injecting fluids into a well |
US7992643B2 (en) | 2003-05-31 | 2011-08-09 | Cameron Systems (Ireland) Limited | Apparatus and method for recovering fluids from a well and/or injecting fluids into a well |
US8122948B2 (en) | 2003-05-31 | 2012-02-28 | Cameron Systems (Ireland) Limited | Apparatus and method for recovering fluids from a well and/or injecting fluids into a well |
US8091630B2 (en) | 2003-05-31 | 2012-01-10 | Cameron Systems (Ireland) Limited | Apparatus and method for recovering fluids from a well and/or injecting fluids into a well |
US8622138B2 (en) | 2003-05-31 | 2014-01-07 | Cameron Systems (Ireland) Limited | Apparatus and method for recovering fluids from a well and/or injecting fluids into a well |
US8220535B2 (en) | 2003-05-31 | 2012-07-17 | Cameron Systems (Ireland) Limited | Apparatus and method for recovering fluids from a well and/or injecting fluids into a well |
US8272435B2 (en) | 2003-05-31 | 2012-09-25 | Cameron Systems (Ireland) Limited | Apparatus and method for recovering fluids from a well and/or injecting fluids into a well |
US8281864B2 (en) | 2003-05-31 | 2012-10-09 | Cameron Systems (Ireland) Limited | Apparatus and method for recovering fluids from a well and/or injecting fluids into a well |
US8540018B2 (en) | 2003-05-31 | 2013-09-24 | Cameron Systems (Ireland) Limited | Apparatus and method for recovering fluids from a well and/or injecting fluids into a well |
US8066067B2 (en) | 2003-05-31 | 2011-11-29 | Cameron International Corporation | Apparatus and method for recovering fluids from a well and/or injecting fluids into a well |
US8066076B2 (en) * | 2004-02-26 | 2011-11-29 | Cameron Systems (Ireland) Limited | Connection system for subsea flow interface equipment |
US20090025936A1 (en) * | 2004-02-26 | 2009-01-29 | Des Enhanced Recovery Limited | Connection system for subsea flow interface equipment |
US9260944B2 (en) | 2004-02-26 | 2016-02-16 | Onesubsea Ip Uk Limited | Connection system for subsea flow interface equipment |
US8776891B2 (en) | 2004-02-26 | 2014-07-15 | Cameron Systems (Ireland) Limited | Connection system for subsea flow interface equipment |
US8066063B2 (en) | 2006-09-13 | 2011-11-29 | Cameron International Corporation | Capillary injector |
US8776893B2 (en) | 2006-12-18 | 2014-07-15 | Cameron International Corporation | Apparatus and method for processing fluids from a well |
US9291021B2 (en) | 2006-12-18 | 2016-03-22 | Onesubsea Ip Uk Limited | Apparatus and method for processing fluids from a well |
US8297360B2 (en) | 2006-12-18 | 2012-10-30 | Cameron International Corporation | Apparatus and method for processing fluids from a well |
US8104541B2 (en) | 2006-12-18 | 2012-01-31 | Cameron International Corporation | Apparatus and method for processing fluids from a well |
WO2009051620A1 (en) * | 2007-10-18 | 2009-04-23 | Williams John R | Stripper rubber with integral retracting retention member connection apparatus |
US8973674B2 (en) | 2010-02-24 | 2015-03-10 | Managed Pressure Operations Pte Ltd. | Drilling system and method of operating a drilling system |
WO2011104279A3 (en) * | 2010-02-24 | 2012-05-03 | Managed Pressure Operations Pte. Limited | Drilling system and method of operating a drilling system |
US9506300B2 (en) | 2011-04-21 | 2016-11-29 | Managed Pressure Operations Pte Ltd. | Slip joint and method of operating a slip joint |
US9500053B2 (en) | 2013-12-17 | 2016-11-22 | Managed Pressure Operations Pte. Ltd. | Drilling system and method of operating a drilling system |
US9845649B2 (en) | 2013-12-17 | 2017-12-19 | Managed Pressure Operations Pte. Ltd. | Drilling system and method of operating a drilling system |
US10435966B2 (en) | 2013-12-17 | 2019-10-08 | Managed Pressure Operations Pte Ltd | Apparatus and method for degassing drilling fluids |
WO2018212823A1 (en) * | 2017-05-17 | 2018-11-22 | Weatherford Technology Holdings, Llc | Pressure control device for use with a subterranean well |
GB2573457A (en) * | 2017-05-17 | 2019-11-06 | Weatherford Tech Holdings Llc | Pressure control device for use with a subterranean well |
GB2573457B (en) * | 2017-05-17 | 2020-04-29 | Weatherford Tech Holdings Llc | Pressure control device for use with a subterranean well |
CN115012864A (en) * | 2022-06-02 | 2022-09-06 | 中国石油化工股份有限公司 | Device for replacing wellhead of gas well without killing well |
Also Published As
Publication number | Publication date |
---|---|
US6450262B1 (en) | 2002-09-17 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6450262B1 (en) | Riser isolation tool | |
US6315051B1 (en) | Continuous circulation drilling method | |
CA2867393C (en) | Method of drilling with a riser string by installing multiple annular seals | |
EP2150680B1 (en) | Rotating control device docking station | |
EP3221552B1 (en) | Annular isolation device for managed pressure drilling | |
US4630680A (en) | Well control method and apparatus | |
US10273766B1 (en) | Plug and play connection system for a below-tension-ring managed pressure drilling system | |
US6102125A (en) | Coiled tubing workover riser | |
AU2014205204B2 (en) | Jetting tool | |
NO345357B1 (en) | A heave compensating system for a floating drilling vessel | |
WO2019168981A1 (en) | Running tool assembly and method | |
WO2023235469A1 (en) | Riserless marine package |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: STEWART & STEVENSON SERVICES, INC., TEXAS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:REGAN, ALBERT M.;REEL/FRAME:013064/0442 Effective date: 20020523 |
|
STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
|
AS | Assignment |
Owner name: COOPER CAMERON CORPORATION, TEXAS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:STEWART & STEVENSON SERVICES, INC.;REEL/FRAME:013691/0886 Effective date: 20020913 |
|
FPAY | Fee payment |
Year of fee payment: 4 |
|
FPAY | Fee payment |
Year of fee payment: 8 |
|
FPAY | Fee payment |
Year of fee payment: 12 |