WO2012012193A1 - Method and system for sealing a wellbore - Google Patents
Method and system for sealing a wellbore Download PDFInfo
- Publication number
- WO2012012193A1 WO2012012193A1 PCT/US2011/042864 US2011042864W WO2012012193A1 WO 2012012193 A1 WO2012012193 A1 WO 2012012193A1 US 2011042864 W US2011042864 W US 2011042864W WO 2012012193 A1 WO2012012193 A1 WO 2012012193A1
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- WO
- WIPO (PCT)
- Prior art keywords
- blocks
- pipe
- seal
- seals
- static
- Prior art date
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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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/06—Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers
- E21B33/061—Ram-type blow-out preventers, e.g. with pivoting rams
- E21B33/062—Ram-type blow-out preventers, e.g. with pivoting rams with sliding rams
Definitions
- the present invention relates generally to techniques for performing wellsite operations. More specifically, the present invention relates to techniques, such as blowout preventers (BOPs) and/or ram blocks, for sealing wellbores.
- BOPs blowout preventers
- ram blocks for sealing wellbores.
- Oilfield operations are typically performed to locate and gather valuable downhole fluids.
- Oil rigs are positioned at wellsites, and downhole tools, such as drilling tools, are deployed into the ground to reach subsurface reservoirs.
- downhole tools such as drilling tools
- casings may be cemented into place within the wellbore, and the wellbore completed to initiate production of fluids from the reservoir.
- Tubing or pipes are typically positioned in the wellbore to enable the passage of subsurface fluids to the surface.
- BOPs blow out preventers
- rams and/or ram blocks that seal the wellbore.
- the present invention is directed to fulfilling these needs in the art.
- wellsite equipment e.g., various pipe diameters
- enhanced sealing e.g., various pipe diameters
- performance under deflection and/or wellsite equipment failures distribution and/or absorption of loads
- enhanced manufacturing capabilities e.g., wider tolerances
- balanced pressures e.g., load, pressure, etc.
- increased capacity e.g., load, pressure, etc.
- the present invention relates to a seal assembly for sealing a wellbore.
- the wellbore has a pipe therein for the passage of fluid therethrough and a blowout preventer (BOP) positionable about the pipe.
- BOP blowout preventer
- the seal assembly has a plurality of blocks positionable within the BOP, each of the blocks having an opening extending into a cavity therein; at least one actuator for selectively moving the blocks to a contact position surrounding the pipe of the wellbore; and a plurality of static pipe seals carried by the blocks for creating a seal about the pipe of the wellbore.
- the static pipe seals are positionable in the cavities of the blocks and flowable through the opening thereof whereby at least a portion of a pressure applied to the static pipe seals is released from the blocks.
- the seal assembly may have a plurality of dynamic pipe seals for creating a seal about the pipe of the wellbore.
- the dynamic pipe seals may be carried by the plurality of blocks and selectively extendable therefrom for sealing engagement about the pipe after the blocks are moved to the contact position whereby the dynamic pipe seals are prevented from extending between the blocks as the blocks are moved to the contact position.
- the opening of the blocks may extend through a bottom surface thereof, each of the static pipe seals flowable from the cavity and through the opening in the bottom surface.
- the seal assembly may also have an anti- extrusion ring for preventing each the static pipe seals from flowing between the blocks, an anti- extrusion plate for preventing each of the static pipe seals from flowing between the blocks, and at least one surface seal for creating a seal between the blocks and the blowout preventer.
- Each of the blocks may have a channel for receiving the at least one surface seal. At least a portion of the channel may be in a top surface of the blocks. A portion of the channel may be in a contact surface of the blocks.
- Each of the blocks may have a depression in a top surface thereof for receiving the surface seal.
- the seal assembly may also have an adapter positionable in the depression for sealing engagement with the surface seal when the blocks are moved to the contact position.
- the present invention relates to a system for sealing a wellbore.
- the wellbore has a pipe therein for the passage of fluid therethrough.
- the system has a BOP positionable about the pipe, and at least one seal assembly positionable about the BOP.
- Each of the seal assemblies have a plurality of blocks positionable within the BOP, each of the plurality of blocks having an opening extending into a cavity therein; at least one actuator for selectively moving the plurality of blocks to a contact position surrounding the pipe of the wellbore; and a plurality of static pipe seals carried by the blocks for creating a seal about the pipe of the wellbore.
- the static pipe seals being positionable in the cavities of the blocks and flowable through the opening thereof whereby at least a portion of a pressure applied to the static pipe seals is released from the blocks.
- the system may also have an adapter positionable between the at least one seal assembly and the blowout preventer.
- Each of the blocks may have a depression therein for receiving the adapter.
- the system may also have a surface seal positionable in the depression between each of the blocks and the adapter for creating a seal therebetween, at least one dynamic pipe seal, a surface seal, and/or at least one controller for selectively activating the at least one actuator.
- the present invention relates to a method for sealing a wellbore.
- the wellbore has a pipe therein for the passage of fluid therethrough.
- the method involves positioning a BOP about the pipe, the BOP having a seal assembly therein comprising a plurality of blocks, each of the blocks having an opening extending into a cavity therein and a static pipe seal in each cavity; pressing the static pipe seals into sealing engagement with the pipe by selectively moving the blocks therein to a contact position surrounding the pipe of the wellbore; and permitting at least a portion of the static pipe seals to flow through the opening of the blocks such that at least a portion of a pressure applied to the static pipe seals is released from the blocks.
- the method may also involve creating a seal about the pipe of the wellbore by selectively extending the dynamic pipe seals from the blocks and into sealing engagement about the pipe after the blocks are moved into the contact position such that the dynamic pipe seals are prevented from extending between the blocks as the blocks are moved to the contact position, selectively retracting the dynamic pipe seals and the blocks, further comprising sealing the blocks together, sealing the blocks with the blowout preventer, positioning an adapter between the blowout preventer and the blocks, and/or preventing the static pipe seals from extending between the blocks.
- Figure 1 shows a schematic view of an offshore wellsite having a BOP with a seal assembly therein according to the present invention.
- Figure 2 shows a schematic view of the BOP of Figure 1.
- Figures 3A-C show longitudinal cross-sectional views of the BOP of Figure 2 taken along line 3-3.
- the seal assembly is a dynamic seal assembly depicted in a first, second and third position, respectively, the dynamic seal assembly comprising ram blocks with dynamic pipe seals therein.
- Figures 4A-C show horizontal cross-sectional views of the BOP of Figure 2 taken along line 4-4.
- the seal assembly is a dynamic seal assembly depicted in a first, second and third position, respectively, the dynamic seal assembly comprising ram blocks with dynamic pipe seals therein.
- Figures 5A-5C show top, side and end views, respectively, of the ram blocks of Figure 4C with the dynamic pipe seals removed.
- Figures 6A-6B are detailed views of one of the ram blocks of Figures 5 A.
- Figure 6A is an inner end view of the one of the ram blocks of Figure 5 A.
- Figure 6B is a cross-sectional view of the ram block of Figure 6A taken along line 6-6, with one of the dynamic pipe seals therein.
- Figure 7 shows a detailed, schematic view of one of the dynamic pipe seals of Figure 4 A, the dynamic pipe seal having segments.
- Figures 8A-C are various schematic views of one of the segments of Figure 7.
- Figures 9A and 9B show longitudinal cross-sectional views of the BOP of Figure 2 taken along line 9-9.
- the seal assembly is a static seal assembly, with a BOP adapter, depicted in a first and second position, respectively, the static seal assembly comprising ram blocks with static pipe seals therein.
- Figures 10A and 10B show horizontal cross-sectional views of the BOP of Figure 2 taken along line 10-10.
- the seal assembly is a static seal assembly, with a BOP adapter, depicted in a first and second position, respectively, the static seal assembly comprising ram blocks with static pipe seals therein.
- Figures 1 lA-11C show top, side and end views, respectively, of the ram blocks of Figure
- Figures 12A-12B are detailed views of one of the ram blocks of Figures 11 A.
- Figure 12A is an inner end view of the one of the ram blocks of Figure 11A.
- Figure 12B is a cross- sectional view of the ram block of Figure 12A taken along line 12-12.
- Figure 13 shows an exploded view of one of the static seal assemblies of Figure 9 A.
- Figure 14 shows a schematic view of an alternate BOP of Figure 1.
- Figures 15A-15C show longitudinal cross-sectional views of the BOP of Figure 14 taken along line 15-15.
- the seal assembly is a static seal assembly depicted in a first, second and third position, respectively, the static seal assembly comprising ram blocks with static pipe seals therein.
- Figures 16A-16C show horizontal cross-sectional views of the BOP of Figure 14 taken along line 16-16.
- the seal assembly is a static seal assembly depicted in a first, second and third position, respectively, the static seal assembly comprising ram blocks with static pipe seals therein.
- Figures 17A-17C show top, side and end views, respectively, of the ram blocks of Figure
- Figures 18A-18B are detailed views of one of the ram blocks of Figures 17 A.
- Figure 18A is an inner end view of the one of the ram blocks of Figure 17A.
- Figure 18B is a cross- sectional view of the ram block of Figure 18A taken along line 18-18.
- Figure 19 is a flow chart depicting a method of sealing a wellbore.
- Figure 1 depicts an offshore wellsite 100 having a seal assembly 102 configured to seal a wellbore 105 extending into in a seabed 107.
- the seal assembly 102 is positioned in a blowout preventer (BOP) 108 that is part of a subsea system 106 positioned on the seabed 107.
- the subsea system 106 may also comprise a pipe (or tubular) 104 extending from the wellbore 105, a wellhead 110 about the wellbore 105, a conduit 112 extending from the wellbore 105 and other subsea devices, such as a stripper and a conveyance delivery system (not shown).
- the wellsite 100 is depicted as a subsea operation, it will be appreciated that the wellsite 100 may be land or water based, and the seal assembly 102 may be used in any wellsite environment.
- a surface system 120 may be used to facilitate operations at the offshore wellsite 100.
- the surface system 120 may comprise a rig 122, a platform 124 (or vessel) and a surface controller 126. Further, there may be one or more subsea controllers 128. While the surface controller 126 is shown as part of the surface system 120 at a surface location and the subsea controller 128 is shown part of the subsea system 106 in a subsea location, it will be appreciated that one or more controllers may be located at various locations to control the surface and/or subsea systems.
- the surface controller 126 and/or the subsea controller 128 may be placed in communication therewith.
- the surface controller 126, the subsea controller 128, and/or any devices at the wellsite 100 may communicate via one or more communication links 134.
- the communication links 134 may be any suitable communication means, such as hydraulic lines, pneumatic lines, wiring, fiber optics, telemetry, acoustics, wireless communication, any combination thereof, and the like.
- the seal assembly 102, BOP 108 and/or other devices at the wellsite 100 may be automatically, manually and/or selectively operated via the controllers 126 and/or 128.
- FIG 2 shows a detailed, schematic view of a BOP 108 that may be used as the BOP 108 of Figure 1.
- the BOP 108 is depicted as a cuboid-shaped device having a hole 220 therethrough for receiving the pipe 104.
- the BOP 108 is also provided with a channel 222 therethrough for receiving the seal assembly 102. While the BOP 108 is depicted as having a specific configuration, it will be appreciated that the BOP 108 may have a variety of shapes, and be provided with other devices, such as sensors (not shown).
- An example of a BOP that may be used is described in US Patent No. 5735502, the entire contents of which is hereby incorporated by reference. Another BOP that may be used is depicted in Figure 14 as will be described further herein.
- Figures 3A-7 depict a dynamic seal assembly 102a usable as the seal assembly 102 of Figures 1 and 2.
- Figures 3A-3C are longitudinal, cross-sectional views of the BOP 108 and dynamic seal assembly 102a of Figure 2 taken along line 3-3.
- Figures 4A-4C are horizontal, cross-sectional views of the BOP 108 and the dynamic seal assembly 102a of Figure 2 taken along line 4-4.
- the seal assembly 102a comprises a pair of blocks (or ram blocks) 326, each block having a dynamic pipe seal 328 therein.
- the blocks 326 are slidably movable within the BOP 108 between a non-contact position as shown in Figure 3 A and 4A, and a face-to-face contact position as shown in Figures 3B-3C and 4B-4C.
- the dynamic pipe seals 328 are slidably movable between a retracted position as shown in Figures 3A-3B and 4A-4B, and an extended position as shown in Figures 3C and 4C.
- One or more actuators 329 may be provided for selectively activating one or more of the blocks 326 and/or pipe seals 328.
- the actuator(s) 329 may be positioned in and/or about the BOP 108 for selective actuation as desired.
- the actuators 329 may be controlled by the controller(s) 126 and/or 128 ( Figure 1).
- the actuator(s) 329 may be, for example, hydraulic cylinders that move the blocks 326 together (or closes the blocks) by pushing them from behind towards each other.
- the actuator(s) 329 selectively move the blocks 326 to the contact position and the pipe seals 328 to the extended position for sealing engagement about the pipe 104.
- the actuators 329 are typically actuated shut, which pushes the blocks 326 together to create a seal about pipe 104. When the situation is over, the actuators 329 may retract the blocks 326 into the BOP to ready for the next use.
- the actuator(s) 329 may be activated based on predefined criteria (e.g., timing, sensors, data, events, etc.) and/or as desired.
- FIGS 5A-5C show top, plan and outer side views, respectively, of the blocks 326 in the face-to-face contact position.
- a pair of blocks 326 with a rectangular shape, an inlet 528 therethrough and a channel 530a therein is preferably provided.
- two or more blocks with a variety of shapes movable within the BOP 108 may be utilized.
- the inlets 528 of the blocks 326 form a hole configured to receive the pipe 104 ( Figures 1 and 2).
- the channels 530a of the blocks 326 form a continuous (and in this case circular) channel therebetween along a top surface 531 of the blocks 326.
- a surface seal 535a is positionable in the channel 530a.
- the surface seals 535a form a seal with the BOP 108 to prevent fluid from passing between the blocks 326 and the BOP 108 adjacent thereto (see, e.g., Figures 3A-3C).
- a vent or eye hole 537 is provided in each block 326 as will be described further herein.
- the blocks 326 each have a contact surface 532 that is preferably flat for face-to-face engagement therebetween.
- the inlet 528 extends through each contact surface 532 on each block 326. This configuration provides positive touching of the blocks 326 along contact surfaces 532 of adjacent blocks 326. As shown, the contact surfaces 532 preferably meet and are pressed against each other. In this position, the blocks 326 surround and form a seal about the pipe 104 which is positioned in the inlets 528.
- apertures 533a extend into side 529 of each of the blocks 326.
- apertures 533b extend into the outer end 545 of each block 326.
- the apertures 533a and 533b are configured to receive portions of the dynamic pipe seal 328 as will be described further herein.
- Figures 6A and 6B are detailed views of one of the blocks 326 (also shown in Figures 3A-3C and 4A-4C).
- Figure 6A shows a plan view of the contact surface 532 of the block 326 with the pipe seal 328 removed.
- the contact surface 532 has the inlet 528 extending
- channel 530b extends from the top surface 531 and continues along the contact surface 532 on either side of the inlet 528.
- a cavity 634 extends through the contact surface 532 and into the block 326. The cavity 634 joins portions of channel 530b on either side of the inlet 528 to form a continuous channel along the contact surface 532.
- the cavity 634 also preferably extends through block 326 for communication with aperture 533b.
- Cavity 634 is configured to receive the dynamic pipe seal 328.
- the dynamic pipe seal 328 is slidably movable within the cavity 634.
- the dynamic pipe seal 328 is preferably positionable adjacent the static pipe seal 335b in cavity 634 and the surface seal 535b in channel 530b to form a continuous seal along contact surface 532 and for sealing engagement therebetween to seal the BOP 108 (see, e.g., Figures 3B-C and 4B-C).
- Figure 6B is a cross-sectional view of block 326 of Figure 6 A taken along line 6-6 with the dynamic pipe seal 328 of Figure 7 taken along line 7-7 therein.
- This view shows the dynamic pipe seal 328 in the block 326 in the retracted position of Figures 3A-B and 4A-B.
- the pipe seal 328 In the retracted position as shown, the pipe seal 328 is positionable such that a seal end 636 is positioned behind the contact surface 532 of block 326 to prevent damage thereto as the blocks 326 are moved to the contact position as shown in Figures 3B and 4B.
- Vent hole 537 is shown as extending into channel 533b. Cavity 634 is preferably in fluid communication with vent hole 537 for passage of fluid, such as air therebetween. The vent hole 537 may release pressure from the blocks 326 as the dynamic pipe seal 328 reciprocates within the block 326. Channel 530a with surface seal 535a therein is also depicted.
- the dynamic pipe seal 328 is shown in greater detail (also shown in Figures 3A-3C and 4A-4C).
- the pipe seal 328 comprises a seal 640, a base 642 and a ram or drive shaft 644.
- the seal 640 is supported on base 642 and extends a distance therefrom.
- the drive shaft 644 is positioned adjacent base 642 on an opposite side from the seal 640.
- the drive shaft 644 may be connected to the base 642 for operation therewith.
- the seal 640, base 642 and drive shaft 644 are selectively movable within the block 326.
- Actuator 329 ( Figure 3A) may be used to move the dynamic pipe seal 328.
- the seal 640 preferably has an arcuate shaped face seal or portion 638 adapted to receive a rounded (or near rounded) pipe 104 ( Figures 1 and 2).
- the face seal 638 is preferably integral with the seal 640.
- the base 642 may be shaped to support the seal 640.
- the seal 640 may be provided with seal supports (or petals or segments) 641 for providing support to the face seal 638.
- the seal supports 641 may be positioned adjacent the face seal 638 in an interlocking formation for supporting the face seal 638 as it is pressed against pipe 104. While the seal supports 641 are depicted as discrete petals, it will be appreciated that the supports may be continuous, discrete, separate from and/or integral with the seal 640.
- each of the seal supports 641 has a body 876 with a channel 870 therethrough.
- the seal supports 641 are preferably provided with keys 872, and keyways 874 for receiving the keys 872.
- the keys 872, keyways 874 and other portions of the segments may be provided for interlocking positioning of the seal supports 641.
- a bonding agent 876 or other materials may be placed about the seal supports 641 for adhesion of the seal supports 641 to the seal 640. While the seal supports 641 as shown have interlocking bodies of a certain shape, the seal supports 641 may be in the form of a unitary ring or other shape as desired to support the seal 640 to achieve the desired sealing engagement with pipe 104.
- the seal 640 and the face seal 638 are made of an elastomeric or other material capable of sealing engagement with the pipe 104 (see, e.g., Figures 3C and 4C).
- the seal supports 641 may be made of elastomeric, plastic or other material, preferably more sturdy than the face seal 640 to provide support thereto.
- One or more gaskets or other sealing items may also be provided as desired for sealing within the BOP 108.
- the drive shaft 644 is positionable in aperture 533b of the blocks 326 and slidably movable therein.
- the drive shaft 644 is snugly positionable within the aperture 533b such that the pipe seal 328 is maintained in balance therein during actuation.
- Base 642 is also preferably snugly fit within cavity 634 to provide further support and balance thereto.
- locking arms (or dogs) 746 are preferably provided for operative interaction with the drive shaft 644.
- An actuator such as actuator 329, may be used to activate the drive shaft 644 and/or the locking arms 746.
- the locking arms 746 are slidably positionable in apertures 533a in the blocks 326.
- the drive shaft 644 has recesses 748 on opposite sides thereof for receiving the locking arms 746.
- the locking arms 746 are capable of securing the drive shaft 644 in a desired position and/or selectively preventing the drive shaft 644 from extension/retraction.
- the BOP 108 may be provided with pockets 751 for receiving the locking arms 746.
- the locking arms are movable between a locked position in the pockets 751 as shown in Figure 4C, and an unlocked position a distance therefrom as shown in Figures 4A and 4B.
- the locking arms 746 and/or pockets 751 may be configured with angled surfaces 749 to facilitate movement of the locking arms 746 relative to the pockets 751.
- the locking arms 746 are preferably configured to move into the locked position when the blocks 326 are moved to the contact position and the pipe seals 328 are moved to the seal position as shown in Figure 4C.
- the locking arms 746 are retracted to a position adjacent drive shaft 644, and the dynamic seal 328 is permitted to slidably move within the cavity 634.
- the blocks 326 With the seal assembly 102a therein) advanced to the face-to-face contact position of Figure 4B, the locking arms 746 are positioned adjacent the pockets 751.
- the locking arms 746 are then permitted to move to the locked position extending into the pockets 751 and the pipe seal 328 may be activated to move to the extended or sealed position adjacent pipe 104 as indicated by the arrows.
- the blocks 326 are preferably maintained in the face-to-face contact position and prevented from retracting.
- the actuator 329 may be used to activate the blocks 326, pipe seal 328, locking arms 746 and/or other components of the seal assembly 102a to achieve the desired movement.
- the actuator 329 may also be used to continue to apply force, maintain a given level of force, or discontinue applying force as desired.
- Seals 535b of each block 326 are also preferably pressed together for sealing engagement therebetween. As force is applied to advance the pipe seal 328, the force may also be used to provide continued motion of the drive shaft 644 to urge the pipe seal 328 against the pipe 104.
- the seal assembly 102a is preferably configured to prevent damage to the seal 640 and/or face seal 638.
- the blocks 326 are activated to move from the retracted position of Figures 3 A and 4A to the face-to-face contact position of Figures 3B and 4B with the pipe seal 328 in the retracted position as shown herein. Once the blocks 326 are moved to the contact position, and preferably locked in place with locking arms 746, the pipe seal 328 may be moved to the seal position of Figures 3C and 4C.
- the pipe seal 328 remain recessed within cavity 634 until the blocks 326 are moved to the contact position. As shown in Figures 3A and 4A, the pipe seal 328 remains in a retracted position in the cavity 634 until the blocks 326 move to the contact position of Figures 3B and 4B. Once the blocks are moved to the contact position, the pipe seals 328 may be extended for sealing engagement with pipe 104. This configuration and/or activation preferably prevents the pipe seal 328 from being extended between the blocks 326 and potentially causing damage to the blocks 326 and/or pipe seals 328 as the blocks 326 move to the contact position.
- Figures 9A-13 depicts a static seal assembly 102b usable as the seal assembly 102 of Figures 1 and 2.
- Figures 9A and 9B are longitudinal, cross-sectional views of the BOP 108 and static seal assembly 102b of Figure 2 taken along line 9-9.
- Figures 10A and 10B are horizontal, cross-sectional views of the BOP 108 and the static seal assembly 102b of Figure 2 taken along line 10-10.
- Figure lOA-C are detailed views of the static seal assembly 102b depicting the components thereof.
- the static seal assembly 102b comprises a BOP adapter 950 and a pair of blocks (or ram blocks) 926, each block having a static pipe seal 928 therein.
- the blocks 926 are slidably movable within the BOP 108 between a non-contact position as shown in Figure 9A and 10A, and a face-to-face contact position as shown in Figures 9B and 10B.
- the static pipe seal 928 is positioned in the blocks 926 and carried thereby.
- One or more actuators 329 may be provided for selectively activating the blocks 926 in the same manner as the blocks 326 and/or 1526 as described herein.
- the BOP adapter 950 is preferably a tubular member positioned in the BOP 108. As shown, the BOP 108 may be modified to receive the BOP adapter 950, for example by machining a recess 951 therein adapted to receive the BOP adapter 950.
- the BOP adapter 950 is positioned in the BOP 108 and is engaged by the blocks 926 during operation. The blocks 926 are adapted to receive the BOP adapter 950 and preferably engage the BOP adapter 950 when in the face-to-face contact position.
- a surface seal 952 may be provided in each block 926 for sealing with the BOP adapter 950.
- the blocks 926 are shown in greater detail in Figures 1 lA-11C (also shown in Figures 9A-9B and 10A-10B).
- Figures 1 lA-11C shows top, plan and outer side views, respectively, of the blocks 926 in the face-to-face contact position.
- the pair of blocks 926 preferably has a rectangular shape, with an inlet 929 and a depression 930 therein.
- two or more blocks 926 may be provided with a variety of shapes movable within the BOP 108.
- the blocks 926 each have a contact surface 932 that is preferably flat for face-to-face engagement therebetween.
- the inlet 929 extends through each contact surface 932 on each block 926. This configuration provides positive touching of the blocks 926 along contact surfaces 932 of adjacent blocks 926. As shown in Figures 11 A and 1 IB, the contact surfaces 932 preferably meet and are pressed against each other. In this position, the blocks 926 surround the pipe 104 which is positioned in the inlets 929 (see Figures 1 and 2). In the contact position as shown, the inlets 929 of the blocks 926 form a hole configured to receive the pipe 104 (see Figures 1 and 2).
- the depressions 930 of the blocks 926 form a continuous (and in this case circular) depression therebetween along a top surface 931 of the blocks 926.
- the surface seal 952 is positionable in the depression 930.
- the depressions 930 are preferably configured for receiving the surface seal 952, and for receiving the BOP adapter 950 when in the contact position.
- the surface seal 952 as shown is a semi-oval member positionable in the depression 930 for sealing engagement with the BOP adapter 950 and the BOP 108.
- the surface seal 952 is positionable in the depression 930 to form a seal with the BOP 108 and the BOP adapter 950 to prevent fluid from passing between the blocks 926 and the BOP 108 adjacent thereto.
- Figures 12A and 12B are detailed views of one of the blocks 926 (also shown in Figures 9A-9C, 1 OA- IOC and 11 A-l 1C).
- Figure 12A shows a plan view of the contact surface 932 of the block 926 with the surface seal 952 and the pipe seal 928 therein.
- Figure 12B is a cross- sectional view of block 926 of Figure 12A taken along line 12-12.
- the contact surface 932 has the inlet 929 extending therethrough.
- a cavity 1234 extends through the contact surface 932 and into the block 926 about inlet 929.
- the cavity 1234 also extends through a bottom surface 935.
- Cavity 1234 is configured to receive the static pipe seal 928.
- the static pipe seal 928 is preferably positionable in the cavity 1234 for sealing engagement with the pipe 104 when the blocks 926 are in the contact position as will be described further herein.
- the static pipe seal 928 is positioned in cavity 1234 for sealing engagement with pipe 104 (see, e.g., Figures 9B and 10B). As shown, the static pipe seal 928 is positioned in a top portion of cavity 1234 and does not fill the entire cavity 1234. While the static pipe seal 928 may be sized to file cavity 1234, cavity 1234 is preferably defined (in this case semi-circularly) to receive pipe seal 928 with additional space to permit deformation of the pipe seal 928 within the cavity 1234.
- the cavity 1234 is preferably open through the bottom surface 935 to permit the static pipe seal 928 to flow therethrough when pipe 104 is pressed against the pipe seal 928.
- an anti-extrusion ring 953 is provided in static pipe seal 928.
- the anti-extrusion ring 953 preferably prevents the static pipe seal 928 from flowing into the inlet 929 adjacent contact surface 932.
- the static pipe seal 928 is permitted to flow from cavity 934 and out opening 955 therein as the blocks 926 are moved into the contact position of Figures 9B and 10B.
- An anti-extrusion plate 937 may also be provided to further prevent the seal from flowing between the blocks 926.
- FIG. 12B and 13 the static seal assembly 102b is shown in greater detail (also shown in Figures 9A-9B and 10A-10B).
- Figure 13 provides an exploded view of the seal assembly 102b.
- the surface seal 952, static pipe seals 928 and arcuate-shaped depression 930 and cavity 1234 are depicted.
- the BOP adapter 950 is depicted as a tubular member.
- the static pipe seal 928, the surface seal 952 and any gaskets used therewith are made of an elastomeric or other material capable of sealing engagement.
- Supports, such as seal supports 641 as used with the dynamic pipe seal 328 of Figures 3A-8C may be used with the static pipe seal 928 and/or the surface seal 952.
- the blocks 926 advance to the face-to- face contact position of Figure 9B and 10B, and the blocks 326 are pressed together.
- the force applied to the blocks preferably provides continued motion to press the blocks 926 together and to urge the seals 928 against the pipe 104.
- surface seals 952 are also pressed against BOP adapter 950 for sealing engagement therewith.
- the actuator 329 may be used to activate the blocks 926 and/or other components of the seal assembly 102b to achieve the desired movement.
- the actuator 329 may also be used to continue to apply force, maintain a given level of force, or discontinue applying force as desired. Seals 928 and 952 of each block 926 are also preferably pressed together for sealing engagement therebetween.
- the seal assembly 102b is preferably configured to prevent damage to the surface seal 952 and/or static pipe seal 928.
- the blocks 926 are activated to move from the retracted position of Figures 9A and 10A to the face-to-face contact position of Figures 9B and 9B with the static pipe seal 928 in the retracted position as shown herein.
- it is further preferable that such seals remain recessed within depression 930 and cavity 1234, respectively, until the blocks 926 are moved to the contact position. Once moved, the seals 952,928 may flow in cavity 1234 (and out the bottom of block 926 if needed) and about the blocks 926 and/or pipe 104 as they are compressed.
- the pipe seal 928 are positioned in the cavity 1234 as the blocks 926 move to the contact position of Figures 9B and 10B.
- This unconfmed configuration and/or activation preferably permits the seals 928 to flow out of the blocks 926 as pressure is applied thereto.
- the static pipe seal 928 is preferably prevented from flowing between the blocks 926, but is permitted to flow out cavity 1234.
- This unconfmed configuration also allows the blocks 926 to receive a boost force applied thereto during activation, and also preferably reduces the pressure on the seals 928 and the strain on the blocks 926.
- the static pipe seal 928 is positioned in a top portion of cavity 1234 and does not fill the entire cavity. While the static pipe seal 928 may be sized to fill cavity 1234, cavity 1234 is preferably defined to receive pipe seal 928 with additional space to permit deformation of the pipe seal 928 within the cavity 1234.
- the cavity 1234 is preferably open through a bottom surface 935 of blocks 926 to permit the static pipe seal 928 to flow therethrough when pipe 104 is pressed against the pipe seal 928.
- the actuator 329 and wellbore pressure outside the blocks 926 apply a force to the blocks 926 as they are pressed together.
- the blocks 1526 are permitted to press together to distribute force therebetween.
- the pipe seals 928 are prevented from extending between the blocks 926.
- the pipe seals 928 are permitted to flow out of the blocks 926 to prevent forces applied to the blocks 926 from remaining in the blocks and potentially causing damage thereto.
- the pipe seal is configured to withstand ultra high pressure of about 30,000 psi (206.84 MPa) or more of wellbore pressure, as well as lower pressures.
- the rubber of the seals therein is preferably allowed to flow where it needs to, and is not fully confined. This configuration is provided to reduce the rubber pressure which reduces the stress in the block that contains the rubber.
- the rubber pressure may be around, for example, the pressure of the wellbore fluid.
- FIG 14 shows a detailed, schematic view of an alternate BOP 108' that may be used as the BOP 108 of Figure 1.
- the BOP 108' is depicted as having a hole 220' therethrough for receiving the pipe 104.
- the BOP 108 is also provided with two channels 222' therethrough for receiving the seal assembly (or assemblies) 102. While the BOP 108' is depicted as having a specific configuration, it will be appreciated that the BOP 108 may have a variety of shapes, and be provided with other devices, such as sensors (not shown).
- An example of a BOP that may be used is depicted in US Patent No. 5735502, previously incorporated by reference herein. Also, the BOP of Figure 2 may also be employed.
- Figures 15-17B depict a static seal assembly 102b' usable as the seal assembly 102 of Figures 1 and 2.
- Figures 15A-15C are longitudinal, cross-sectional views of the BOP 108' of Figure 14 taken along line 15-15 with the static seal assembly 102b' therein.
- Figures 16A-16C are horizontal, cross-sectional views of the BOP 108' and the static seal assembly 102b' of Figure 14 taken along line 16-16.
- Figures 18A-C are detailed views of the static seal assembly 102b' depicting the components thereof.
- the seal assembly 102b' comprises a pair of blocks (or ram blocks) 1526, each block having a static pipe seal 1528 therein.
- the blocks 1526 are slidably movable within the BOP 108' between a non-contact position as shown in Figure 15 A and 16A, and a face-to-face contact position as shown in Figures 15C and 16C.
- the static pipe seal 1528 is positioned in the blocks 1526 and carried thereby. In an intermediate position of Figures 15B and 16B, the static pipe seals 1528 of each block meet, and are then pressed together to permit the blocks 1526 to move to the face-to-face contact position of Figures 15C and 16C.
- One or more actuators 329 may be provided for selectively activating the blocks 1526 in the same manner as the blocks 326 and/or 926 as described herein.
- a surface seal 1552 may be provided in each block 1526 for sealing with the BOP 108'.
- the blocks 1526 have a cavity 1527 for receiving the surface seal 1552 and preferably engage the BOP 108' to form a seal between the BOP 108' and the blocks 1526.
- the surface seal 1552 preferably prevent leakage of fluid from the pipe 104 and between the BOP 108' and a top side of the blocks 1526.
- FIG. 17A-17C shows top, plan and outer side views, respectively, of the blocks 1526 in the face-to-face contact position.
- the pair of blocks 1526 has an octagonal shape when put together, an inlet 1729 therein and a channel 1730 therein is preferably provided.
- two or more blocks 1526 may be provided with a variety of shapes movable within the BOP 108'.
- the blocks 1526 each have a contact surface 1732 that is preferably flat for face-to-face engagement therebetween.
- the inlet 1729 extends through each contact surface 1732 on each block 1526. This configuration provides positive touching of the blocks 1526 along contact surfaces 1732 of adjacent blocks 1526. As shown in Figures 17A and 17B, the contact surfaces 1732 preferably meet and are pressed against each other. In this position, the blocks 1526 surround the pipe 104 which is positioned in the inlets 1729 (see, e.g., Figures 15A-C).
- the inlets 1729 of the blocks 1526 form a hole configured to receive the pipe 104 (see Figures 1 and 2).
- the channels 1730 of the blocks 1526 form a continuous (and in this case circular) channel therein along a top surface 1731 of the blocks 1526.
- the surface seal 1552 is positionable in the channel 1730.
- the channels 1730 are preferably configured for receiving the surface seal 1552.
- the surface seal 1552 as shown is a semi-oval member positionable in the channel 1730.
- the surface seal 1552 is positionable in the cavity 1527 to form a seal with the BOP 108' to prevent fluid from passing between the blocks 1526 and the BOP 108 adjacent thereto.
- Figures 18A and 18B are detailed views of one of the blocks 1526 (also shown in Figures 15A-15C, 16A-16C and 17A-17C).
- Figure 18A shows a plan view of the contact surface 1732 of the blocks 1526 with the surface seal 1552 and the static pipe seal 1528 therein.
- Figure 18B is a cross-sectional view of block 1526 of Figure 18A taken along line 18-18.
- the contact surface 1732 has the inlet 1729 extending therethrough.
- the cavity 1834 extends through the contact surface 1732 and into the block 1526 about inlet 1729.
- the cavity 1834 also extends through a bottom surface 1838. Cavity 1834 is configured to receive the static pipe seal 1528.
- the static pipe seal 1528 is preferably positionable in cavity 1834 for sealing engagement with the pipe 104 when the blocks 1526 are in the contact position as shown in Figures 15C and 16C.
- the static pipe seal 1528 is positioned in cavity 1834 for sealing engagement with pipe 104. As shown, the static pipe seal 1528 is positioned in a top portion of cavity 1834 and does not fill the entire cavity. While the static pipe seal 1528 may be sized to fill cavity 1834, cavity 1834 is preferably defined to receive pipe seal 1528 with additional space to permit deformation of the pipe seal 1528 within the cavity 1834. The cavity 1834 is preferably open through the bottom surface 1838 to permit the static pipe seal 1528 to flow therethrough when pipe 104 is pressed against the pipe seal 1528.
- the seal assembly 102b' is preferably configured to prevent damage to the surface seal 1552 and/or static pipe seal 1528.
- the blocks As shown in Figure 18B, an anti-extrusion ring 1853 is provided in static pipe seal 1528.
- the anti-extrusion ring 1853 preferably prevents the static pipe seal 1528 from flowing into the inlet 1729 adjacent contact surface 1732.
- the static pipe seal 1528 is permitted to flow from cavity 1834 and out opening 1855 therein as the blocks 1526 are moved into the contact position of Figures 15C and 16C.
- An anti-extrusion plate 1837 may also be provided to further prevent the seal from flowing between the blocks 1526.
- the pipe seals 1528 are positioned in the cavity 1834 as the blocks 1526 move to the contact position of Figures 15C and 16C.
- This unconfmed configuration and/or activation preferably permit the seals 1552 and 1528 to flow out of the blocks 1526 as pressure is applied thereto.
- the static pipe seal 1528 is preferably prevented from flowing between the blocks 1526, but is permitted to flow out opening 1855.
- This unconfmed configuration allows the blocks 1526 to receive a boost force applied thereto during activation to reduce the pressure on the seals, and also preferably reduces pressure on the seals 1528 and the strain on the blocks 1526.
- the actuator 329 and wellbore pressure outside the blocks 1526 apply a force to the blocks 1526 as they are pressed together.
- the blocks 1526 are permitted to press together to distribute force therebetween.
- the pipe seals 1528 are prevented from extending between the blocks 1526.
- forces applied to the pipe seal 1528 are permitted to exit the blocks 1526.
- the pipe seals 1528 are permitted to flow out of the blocks 1526 to prevent forces applied to the blocks 1526 from damaging the blocks.
- the pipe seal is configured to withstand ultra high pressure of about 30,000 psi (206.84 MPa) or more of wellbore pressure, as well as lower pressures.
- the rubber of the seals therein is preferably allowed to flow where it needs to, and is not fully confined. This configuration is provided to reduce the rubber pressure which reduces the stress in the block that contains the rubber.
- the rubber pressure may be around, for example, the pressure of the wellbore fluid.
- seal assemblies 102a,b and 102' are depicted in a specific configuration, it will be appreciated that the seal assemblies and/or BOP 108 may be inverted. Additional
- components such as gaskets, locking arms or mechanisms and/or dynamic seals, may be used in combination with and/or incorporated into the static seal assembly for operation therewith.
- static seal assembly and the dynamic seal assembly may be provided.
- Figure 19 is a flowchart depicting a method 1900 of sealing a wellbore, such as the wellbore 104 of Figure 1.
- the method involves positioning 1980 a BOP 108,108' about a pipe 104 in a wellbore 105.
- the BOP 108, 108' has a seal assembly 102 therein also positionable about the pipe 104.
- the seal assembly 102 may be a dynamic seal assembly 102a comprising blocks 326 with dynamic pipe seals 328 therein.
- the seal assembly 102 may be a static seal assembly 102b, b' comprising blocks 926, 1526 with static pipe seals 928, 1528 therein.
- Actuators are used to selectively move 1982 blocks 326, 926, 1526 of the seal assembly into the contact position surrounding the pipe of the wellbore. This movement may involve moving the blocks between a non-contact position (see, e.g., Figures 3 A, 4A, 9A, 10A, 15 A, 16A) and a face-to-face contact position (see, e.g., Figures 3B, 3C, 4B, 4C, 9B, 10B, 15C, 16C).
- the actuators may also be used to selectively move the pipe seals into sealing engagement with the pipe.
- a seal is created 1986 about the pipe by selectively extending the pipe seals 328, 928, 1528 from the blocks and into sealing engagement about the pipe after the plurality of blocks are moved into the contact position such that the plurality of pipe seals is prevented from extending between the plurality of blocks as the plurality of blocks are moved into the contact position.
- the blocks 926, 1526 each have an opening extending into a cavity therein and a pipe seal 928, 1528 therein.
- the pipe seals are pressed 1987 into sealing engagement with the pipe by selectively moving the plurality of blocks therein into a contact position surrounding the pipe of the wellbore.
- the static pipe seals 928, 1528 may be permitted to flow through the opening of the plurality of blocks such that at least a portion of a pressure applied to the plurality of pipe seals is released from the plurality of blocks.
- each of the plurality of blocks are pressed 1988 against each other and the pressing the plurality of pipe seals into sealing engagement with each other after the plurality of blocks are moved into the contact position.
- the blocks may be retracted 1990, and the process repeated 1992 as desired.
- Additional steps may also be performed, such as measuring parameters, such as pressure, force, deflection and other parameters relating to the seal assembly 102, analyzing data and adjusting wellbore operations based on the measured parameters.
- the techniques disclosed herein can be implemented for automated/autonomous applications via software configured with algorithms to perform the desired functions. These aspects can be implemented by programming one or more suitable general-purpose computers having appropriate hardware. The programming may be accomplished through the use of one or more program storage devices readable by the processor(s) and encoding one or more programs of instructions executable by the computer for performing the operations described herein.
- the program storage device may take the form of, e.g., one or more floppy disks; a CD ROM or other optical disk; a read-only memory chip (ROM); and other forms of the kind well known in the art or subsequently developed.
- the program of instructions may be "object code,” i.e., in binary form that is executable more-or-less directly by the computer; in "source code” that requires compilation or interpretation before execution; or in some intermediate form such as partially compiled code.
- object code i.e., in binary form that is executable more-or-less directly by the computer
- source code that requires compilation or interpretation before execution
- some intermediate form such as partially compiled code.
- the precise forms of the program storage device and of the encoding of instructions are immaterial here. Aspects of the invention may also be configured to perform the described functions (via appropriate hardware/software) solely on site and/or remotely controlled via an extended communication (e.g., wireless, internet, satellite, etc.) network.
- extended communication e.g., wireless, internet, satellite, etc.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11810143.5A EP2596206A4 (en) | 2010-07-19 | 2011-07-01 | Method and system for sealing a wellbore |
CA2806019A CA2806019C (en) | 2010-07-19 | 2011-07-01 | Method and system for sealing a wellbore |
BR112013001382A BR112013001382A2 (en) | 2010-07-19 | 2011-07-01 | sealing unit and method for sealing a wellbore |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/838,776 US8540017B2 (en) | 2010-07-19 | 2010-07-19 | Method and system for sealing a wellbore |
US12/838,776 | 2010-07-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012012193A1 true WO2012012193A1 (en) | 2012-01-26 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2011/042864 WO2012012193A1 (en) | 2010-07-19 | 2011-07-01 | Method and system for sealing a wellbore |
Country Status (5)
Country | Link |
---|---|
US (1) | US8540017B2 (en) |
EP (1) | EP2596206A4 (en) |
BR (1) | BR112013001382A2 (en) |
CA (1) | CA2806019C (en) |
WO (1) | WO2012012193A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013155191A2 (en) | 2012-04-10 | 2013-10-17 | National Oilwell Varco, L.P. | Blowout preventer seal assembly and method of using same |
WO2013155206A2 (en) | 2012-04-10 | 2013-10-17 | National Oilwell Varco, L.P. | Blowout preventer with locking ram assembly and method of using same |
US9045961B2 (en) | 2011-01-31 | 2015-06-02 | National Oilwell Varco, L.P. | Blowout preventer seal and method of using same |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8844898B2 (en) | 2009-03-31 | 2014-09-30 | National Oilwell Varco, L.P. | Blowout preventer with ram socketing |
US9428994B2 (en) | 2010-07-01 | 2016-08-30 | National Oilwell Varco, L.P. | Blowout preventer monitor with trigger sensor and method of using same |
US8540017B2 (en) * | 2010-07-19 | 2013-09-24 | National Oilwell Varco, L.P. | Method and system for sealing a wellbore |
US8544538B2 (en) * | 2010-07-19 | 2013-10-01 | National Oilwell Varco, L.P. | System and method for sealing a wellbore |
US9260932B2 (en) * | 2010-09-14 | 2016-02-16 | National Oilwell Varco, L.P. | Blowout preventer ram assembly and method of using same |
US9175538B2 (en) * | 2010-12-06 | 2015-11-03 | Hydril USA Distribution LLC | Rechargeable system for subsea force generating device and method |
NO2683912T3 (en) | 2011-03-09 | 2018-01-20 | ||
EP2726699B1 (en) | 2011-06-29 | 2015-07-15 | National Oilwell Varco, L.P. | Blowout preventer seal assembly and method of using same |
US9238950B2 (en) | 2014-01-10 | 2016-01-19 | National Oilwell Varco, L.P. | Blowout preventer with packer assembly and method of using same |
US10190380B2 (en) | 2014-05-14 | 2019-01-29 | General Electric Company | Method for monitoring a sealing element |
US9580988B2 (en) * | 2014-12-09 | 2017-02-28 | Hydril USA Distribution LLC | Variable ram packer with strain reduction features |
US9970254B2 (en) * | 2015-08-31 | 2018-05-15 | Cameron International Corporation | Blowout preventer with inflatable element |
US10161212B2 (en) * | 2015-11-24 | 2018-12-25 | Cameron International Corporation | Packer assembly with multiple different inserts for blowout preventer |
CA3013084C (en) * | 2016-02-10 | 2024-01-16 | Dreco Energy Services Ulc | Anti-extrusion seal arrangement and ram-style blowout preventer |
US10900313B2 (en) | 2016-07-26 | 2021-01-26 | Dreco Energy Services Ulc | Method and apparatus for production well pressure containment for blowout |
US11035198B2 (en) | 2017-01-16 | 2021-06-15 | Dreco Energy Services Ulc | Multifunction blowout preventer |
US10941628B2 (en) | 2017-09-25 | 2021-03-09 | Dreco Energy Services Ulc | Adjustable blowout preventer and methods of use |
US20230313629A1 (en) * | 2022-03-31 | 2023-10-05 | James LOMBARDI | Blowout preventer and components thereof |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4582293A (en) * | 1982-01-06 | 1986-04-15 | Koomey Blowout Preventers, Inc. | Hydraulically operated valves |
WO2006014895A2 (en) * | 2004-07-27 | 2006-02-09 | T-3 Property Holdings, Inc. | Shearing sealing ram |
US20060278406A1 (en) * | 2005-06-08 | 2006-12-14 | Judge Robert A | Rod lock for ram blowout preventers |
US7510002B2 (en) * | 2004-11-13 | 2009-03-31 | Hunting Cromar Limited | Apparatus and method for sealing a wellbore |
Family Cites Families (250)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2193110A (en) | 1935-09-07 | 1940-03-12 | Kirby T Penick | Blowout preventer |
US2178698A (en) | 1936-05-04 | 1939-11-07 | Arthur J Penick | Tubing head |
US2194256A (en) | 1937-05-07 | 1940-03-19 | Cameron Iron Works Inc | Multiple seal blowout preventer |
US2231613A (en) | 1940-04-03 | 1941-02-11 | Paul Stock | Blowout preventer and control head |
US2304793A (en) | 1941-06-09 | 1942-12-15 | Calpat Corp | Method of and apparatus for cutting pipe |
US2592197A (en) | 1947-10-27 | 1952-04-08 | Jr Frank J Schweitzer | Side-plug hydraulic cellar gate |
US2752119A (en) | 1952-03-24 | 1956-06-26 | Cameron Iron Works Inc | Blowout preventer |
US2690320A (en) * | 1952-04-28 | 1954-09-28 | Shaffer Tool Works | Dual type blowout preventer |
US3028917A (en) | 1955-08-04 | 1962-04-10 | Mcevoy Co | Well completion apparatus |
US3001803A (en) | 1956-05-07 | 1961-09-26 | Gray Tool Co | Wellhead |
US3040611A (en) | 1956-11-15 | 1962-06-26 | Duralumin | Guillotine shears |
US3242826A (en) | 1963-10-11 | 1966-03-29 | Shaffer Tool Works | Locking device for a fluid operated rod |
US3272222A (en) | 1963-10-28 | 1966-09-13 | Cameron Iron Works Inc | Blowout preventer |
US3434729A (en) | 1965-10-21 | 1969-03-25 | Shaffer Tool Works | Ram assembly |
US3399728A (en) | 1966-12-01 | 1968-09-03 | Allan R. Taylor | Conduit closure apparatus |
US3554480A (en) | 1968-01-16 | 1971-01-12 | Cameron Iron Works Inc | Blowout preventer |
US3572628A (en) | 1968-10-04 | 1971-03-30 | Cameron Iron Works Inc | Blowout preventer |
US3554278A (en) | 1969-07-31 | 1971-01-12 | Exxon Production Research Co | Pipe alignment apparatus |
US3561526A (en) | 1969-09-03 | 1971-02-09 | Cameron Iron Works Inc | Pipe shearing ram assembly for blowout preventer |
US3771601A (en) | 1970-07-16 | 1973-11-13 | H Garrett | Well bore blocking method |
US3647174A (en) | 1970-09-25 | 1972-03-07 | Hydril Co | Blowout preventer |
US3670761A (en) | 1970-10-13 | 1972-06-20 | Hydril Co | Blowout preventer with resistance means between the body and the piston |
US3744749A (en) | 1971-05-18 | 1973-07-10 | Hydril Co | Blowout preventer with ram support and guide means |
US3716068A (en) | 1971-06-11 | 1973-02-13 | F Addison | Surface controlled blowout arrester |
US3741296A (en) | 1971-06-14 | 1973-06-26 | Hydril Co | Replacement of sub sea blow out preventer packing units |
US3871613A (en) | 1971-09-08 | 1975-03-18 | Robert K Lerouax | Non-rotating ram rod locking assembly for blowout preventer |
GB1352260A (en) | 1971-09-29 | 1974-05-08 | Hydril Co | Blowout preventers |
GB1352258A (en) | 1971-09-29 | 1974-05-08 | Hydril Co | Blowout preventer |
US3766979A (en) | 1972-04-20 | 1973-10-23 | J Petrick | Well casing cutter and sealer |
US3946806A (en) | 1972-06-16 | 1976-03-30 | Cameron Iron Works, Inc. | Ram-type blowout preventer |
US4007905A (en) * | 1973-01-29 | 1977-02-15 | Hydril Company | Retrievable blow-out preventer ram seals |
US3863667A (en) | 1973-03-21 | 1975-02-04 | Pipe Line Development Co | Combined shear head and housing plug |
US3918478A (en) | 1974-02-11 | 1975-11-11 | Hydril Co | Blowout preventer with locking means |
US3941141A (en) | 1974-05-03 | 1976-03-02 | Robert Eddie L | Blowout preventer locking apparatus and method |
US4057887A (en) | 1974-05-06 | 1977-11-15 | Cameron Iron Works, Inc. | Pipe disconnecting apparatus |
US4007797A (en) | 1974-06-04 | 1977-02-15 | Texas Dynamatics, Inc. | Device for drilling a hole in the side wall of a bore hole |
US3922780A (en) | 1974-11-04 | 1975-12-02 | Cyril Robert Green | Cable spearing and cutting apparatus |
US3955622A (en) | 1975-06-09 | 1976-05-11 | Regan Offshore International, Inc. | Dual drill string orienting apparatus and method |
US4071935A (en) | 1975-08-07 | 1978-02-07 | Stainless Equipment Company | Method of making heat exchanger |
US4052995A (en) | 1975-08-19 | 1977-10-11 | Hydril Company | Blowout preventer ram lock and locking method |
GB1516273A (en) | 1976-03-19 | 1978-06-28 | British Gas Corp | Stopping fluid flow in pipes |
US4043389A (en) | 1976-03-29 | 1977-08-23 | Continental Oil Company | Ram-shear and slip device for well pipe |
FR2362332A1 (en) | 1976-04-29 | 1978-03-17 | Commissariat Energie Atomique | PYROTECHNICAL DEVICE FOR BLOCKING A PIPELINE |
US4076208A (en) | 1976-10-04 | 1978-02-28 | Hydril Company | Blowout preventer ram lock |
US4188860A (en) | 1978-01-03 | 1980-02-19 | Shafco Industries, Inc. | Locking mechanism |
US4162057A (en) | 1978-04-05 | 1979-07-24 | Aerojet-General Corporation | Linear retractable seal valve |
US4132267A (en) | 1978-04-06 | 1979-01-02 | Cameron Iron Works, Inc. | Pipe shearing ram assembly for blowout preventer |
US4132266A (en) | 1978-04-06 | 1979-01-02 | Cameron Iron Works, Inc. | Pipe shearing ram assembly for blowout preventer |
US4132265A (en) | 1978-04-06 | 1979-01-02 | Cameron Iron Works, Inc. | Pipe shearing ram assembly for blowout preventer |
US4229012A (en) | 1978-04-28 | 1980-10-21 | Cameron Iron Works, Inc. | Variable bore packer assembly for ram-type blowout preventers |
US4192483A (en) | 1978-12-20 | 1980-03-11 | Grove Valve And Regulator Company | One piece seat ring with O-ring seal |
US4220206A (en) | 1979-01-22 | 1980-09-02 | Winkle Denzal W Van | Quick opening closure arrangement for well completions |
US4265424A (en) | 1979-02-01 | 1981-05-05 | Cameron Iron Works, Inc. | Blowout preventer and improved ram packer structure |
US4215749A (en) | 1979-02-05 | 1980-08-05 | Acf Industries, Incorporated | Gate valve for shearing workover lines to permit shutting in of a well |
US4253638A (en) | 1979-08-02 | 1981-03-03 | Cameron Iron Works, Inc. | Blowout preventer |
US4290577A (en) | 1979-09-24 | 1981-09-22 | Hydril Company | Blowout preventer ram lock |
US4416441A (en) | 1979-10-29 | 1983-11-22 | Winkle Denzal W Van | Blowout preventer |
US4392633A (en) | 1979-10-29 | 1983-07-12 | Winkle Denzal W Van | Valve structure having movable seat means |
US4305565A (en) | 1980-04-07 | 1981-12-15 | Hydril Company | Variable position ram lock for blowout preventers |
US4313496A (en) | 1980-04-22 | 1982-02-02 | Cameron Iron Works, Inc. | Wellhead shearing apparatus |
US4323256A (en) | 1980-04-30 | 1982-04-06 | Hydril Company | Front packer seal for ram blowout preventer |
US4332367A (en) | 1980-05-02 | 1982-06-01 | Nl Industries, Inc. | Blowout preventer having a variable ram seal |
US4372527A (en) | 1980-05-05 | 1983-02-08 | Dresser Industries, Inc. | Blowout preventer |
US4438900A (en) | 1980-06-05 | 1984-03-27 | Nl Industries, Inc. | Locking mechanism for annular blowout preventer |
US4341264A (en) | 1980-10-15 | 1982-07-27 | Cameron Iron Works, Inc. | Wellhead shearing apparatus |
US4347898A (en) | 1980-11-06 | 1982-09-07 | Cameron Iron Works, Inc. | Shear ram blowout preventer |
US4437643A (en) | 1981-06-25 | 1984-03-20 | Cameron Iron Works, Inc. | Ram-type blowout preventer |
US4456215A (en) | 1982-05-07 | 1984-06-26 | Bowen Tools, Inc. | Inner seal and support rod assembly for high pressure blowout preventers |
US4492359A (en) | 1982-06-25 | 1985-01-08 | Baugh Benton F | Valve assembly |
US4444404A (en) | 1982-10-19 | 1984-04-24 | Hydril Company | Variable bore ram packing element and blowout preventer |
US4508311A (en) | 1982-11-12 | 1985-04-02 | Cameron Iron Works, Inc. | Annular blowout preventer |
US4519577A (en) | 1982-12-02 | 1985-05-28 | Koomey Blowout Preventers, Inc. | Flow controlling apparatus |
US4508313A (en) | 1982-12-02 | 1985-04-02 | Koomey Blowout Preventers, Inc. | Valves |
US4502534A (en) | 1982-12-13 | 1985-03-05 | Hydril Company | Flow diverter |
JPS59134918A (en) | 1983-01-24 | 1984-08-02 | Toshiba Corp | Latch circuit |
DE3317487A1 (en) | 1983-05-13 | 1984-11-15 | Gabrie, Duje Welter, 5170 Jülich | Positive locking system for pistons of pressure-medium cylinders |
US4518144A (en) | 1983-09-01 | 1985-05-21 | Cameron Iron Works, Inc. | Ram-type blowout preventer and packer therefor |
US4558842A (en) | 1983-09-06 | 1985-12-17 | Bowen Tools, Inc. | Connector for joining blowout preventer members |
US4540046A (en) | 1983-09-13 | 1985-09-10 | Nl Industries, Inc. | Shear ram apparatus |
US4647002A (en) | 1983-09-23 | 1987-03-03 | Hydril Company | Ram blowout preventer apparatus |
US4504037A (en) | 1983-09-26 | 1985-03-12 | Hydril Company | Ram blowout preventer securing and retracting apparatus |
US4516598A (en) | 1983-10-24 | 1985-05-14 | Stupak Adam E | Well safety valve |
US4523639A (en) | 1983-11-21 | 1985-06-18 | Koomey Blowout Preventers, Inc. | Ram type blowout preventers |
US4537250A (en) | 1983-12-14 | 1985-08-27 | Cameron Iron Works, Inc. | Shearing type blowout preventer |
US4526339A (en) | 1984-05-11 | 1985-07-02 | Universal Well Control Systems | Blowout preventer |
US4550895A (en) | 1984-09-24 | 1985-11-05 | Shaffer Donald U | Ram construction for oil well blow out preventer apparatus |
US4601232A (en) | 1985-03-01 | 1986-07-22 | Cameron Iron Works, Inc. | Rod locking device |
FR2580053B1 (en) | 1985-04-04 | 1987-09-25 | Petroles Cie Francaise | |
US4840346A (en) * | 1985-04-11 | 1989-06-20 | Memory Metals, Inc. | Apparatus for sealing a well blowout |
DE3516424A1 (en) | 1985-05-04 | 1986-11-06 | Moller, Falk von, Dipl.-Ing. (FH), 3100 Celle | Method and device for cutting through bars made of high-alloy steel |
US4612983A (en) | 1985-10-15 | 1986-09-23 | Gray Tool Company | Shear type gate valve |
US4690033A (en) | 1985-12-16 | 1987-09-01 | Winkle Denzal W Van | Self actuating locking and unlocking arrangement and method for reciprocating piston type actuators |
US4690411A (en) | 1985-12-23 | 1987-09-01 | Winkle Denzal W Van | Bonded mechanically inner connected seal arrangement for a blowout preventer |
US4646825A (en) | 1986-01-02 | 1987-03-03 | Winkle Denzal W Van | Blowout preventer, shear ram, shear blade and seal therefor |
US4655284A (en) | 1986-02-11 | 1987-04-07 | Positive Action Tool Western Limited | Well head shut-off device |
EP0242008B1 (en) | 1986-04-18 | 1991-12-27 | Cooper Industries, Inc. | Blowout preventer |
US4770387A (en) | 1986-10-24 | 1988-09-13 | Nl Industries, Inc. | Variable ram seal for blowout preventers |
US4969627A (en) | 1986-10-27 | 1990-11-13 | Cameron Iron Works Usa, Inc. | Rod locking device |
US4922423A (en) | 1987-12-10 | 1990-05-01 | Koomey Paul C | Position and seal wear indicator for valves and blowout preventers |
JPH01141905U (en) | 1988-03-23 | 1989-09-28 | ||
US4877217A (en) | 1988-10-27 | 1989-10-31 | Bowen Tools, Inc. | Fail-safe blowout preventer |
US4923005A (en) | 1989-01-05 | 1990-05-08 | Otis Engineering Corporation | System for handling reeled tubing |
CA1291923C (en) | 1989-01-16 | 1991-11-12 | Stanley W. Wachowicz | Hydraulic power system |
US4969390A (en) | 1989-05-30 | 1990-11-13 | Cooper Industries, Inc. | Rod locking device |
US4938290A (en) | 1989-06-19 | 1990-07-03 | Eastern Oil Tools Pte Ltd | Wireline blowout preventer having mechanical and hydraulic sealing |
US4923006A (en) | 1989-08-07 | 1990-05-08 | Cameron Iron Works Usa, Inc. | Insulating support for tubing string |
US4911410A (en) | 1989-07-21 | 1990-03-27 | Cameron Iron Works Usa, Inc. | Shearing gate valve |
US4997162A (en) | 1989-07-21 | 1991-03-05 | Cooper Industries, Inc. | Shearing gate valve |
US4943031A (en) | 1989-08-17 | 1990-07-24 | Drexel Oilfield Services, Inc. | Blowout preventer |
US5002130A (en) | 1990-01-29 | 1991-03-26 | Otis Engineering Corp. | System for handling reeled tubing |
US5025708A (en) | 1990-01-30 | 1991-06-25 | Baroid Technology, Inc. | Actuator with automatic lock |
US5064164A (en) | 1990-08-16 | 1991-11-12 | Baroid Technology, Inc. | Bop seal with improved metal inserts |
US5011110A (en) | 1990-08-16 | 1991-04-30 | Baroid Technology, Inc. | BOP seal with improved metal inserts |
US5056418A (en) * | 1990-10-18 | 1991-10-15 | Granger Stanley W | Self-adjusting automatic locking piston for RAM blowout preventers |
US5199493A (en) | 1991-05-03 | 1993-04-06 | Sodder George Jr | Methods and apparatus for shutting a conduit |
DE4114887A1 (en) | 1991-05-07 | 1992-11-12 | Bruns Werner | DISCONNECTING AND LOCKING DEVICE FOR PRESSURE PIPES IN CONVEYOR AND SUPPLY PLANTS |
US5150049A (en) | 1991-06-24 | 1992-09-22 | Schuetz Tool & Die, Inc. | Magnetostrictive linear displacement transducer with temperature compensation |
US5178215A (en) | 1991-07-22 | 1993-01-12 | Folsom Metal Products, Inc. | Rotary blowout preventer adaptable for use with both kelly and overhead drive mechanisms |
CA2048780C (en) | 1991-08-08 | 1997-12-16 | Edward Joseph Schartinger | Blade for cutting cylindrical structures |
US5125620A (en) | 1991-10-02 | 1992-06-30 | Hydril Company | Ram type blowout preventer having improved ram front packing |
US5199683A (en) | 1992-06-09 | 1993-04-06 | Baroid Technology, Inc. | Blowout preventer opening mechanism |
US5360061A (en) | 1992-10-14 | 1994-11-01 | Womble Lee M | Blowout preventer with tubing shear rams |
US5255890A (en) | 1992-11-12 | 1993-10-26 | Hydril Company | Ram type blowout preventer |
US5361832A (en) | 1993-06-17 | 1994-11-08 | Drexel Oilfield Services, Inc. | Annular packer and insert |
GB2280918B (en) | 1993-08-02 | 1996-12-11 | Hydril Co | Position instrumented blowout preventer |
US5320325A (en) | 1993-08-02 | 1994-06-14 | Hydril Company | Position instrumented blowout preventer |
US5400857A (en) | 1993-12-08 | 1995-03-28 | Varco Shaffer, Inc. | Oilfield tubular shear ram and method for blowout prevention |
US5501424A (en) | 1994-02-09 | 1996-03-26 | Fmc Corporation | Wire cutting insert for gate valve |
CA2145145A1 (en) | 1994-04-19 | 1995-10-20 | Richard A. Olson | Ram-type blowout preventer |
US5713581A (en) | 1994-10-03 | 1998-02-03 | Hydril Company | Fibrous seal for blowout preventer |
ES2179176T3 (en) | 1995-01-13 | 2003-01-16 | Hydril Co | SUPPRESSOR OF HIGH PRESSURE LEAK, LOW PROFILE AND LIGHT WEIGHT. |
US5515916A (en) | 1995-03-03 | 1996-05-14 | Stewart & Stevenson Services, Inc. | Blowout preventer |
US5505426A (en) | 1995-04-05 | 1996-04-09 | Varco Shaffer, Inc. | Hydraulically controlled blowout preventer |
US5590867A (en) | 1995-05-12 | 1997-01-07 | Drexel Oil Field Services, Inc. | Blowout preventer for coiled tubing |
US5566753A (en) | 1995-06-07 | 1996-10-22 | Drexel Oil Field Services, Inc. | Stripper/packer |
US5588491A (en) | 1995-08-10 | 1996-12-31 | Varco Shaffer, Inc. | Rotating blowout preventer and method |
US5575452A (en) | 1995-09-01 | 1996-11-19 | Varco Shaffer, Inc. | Blowout preventer with ram wedge locks |
US5863022A (en) | 1996-01-16 | 1999-01-26 | Van Winkle; D. Wayne | Stripper/packer and blowout preventer with split bonnet |
US5775420A (en) | 1996-03-18 | 1998-07-07 | Mitchell; Morton Lindsay | Dual string assembly for gas wells |
US5897074A (en) | 1996-07-30 | 1999-04-27 | Nuway Corporation | Moist tissue dispenser having sealing arms |
US5778918A (en) | 1996-10-18 | 1998-07-14 | Varco Shaffer, Inc. | Pilot valve with improved cage |
US5735502A (en) | 1996-12-18 | 1998-04-07 | Varco Shaffer, Inc. | BOP with partially equalized ram shafts |
US5897094A (en) | 1996-12-27 | 1999-04-27 | Varco Shaffer, Inc. | BOP with improved door connectors |
US6089526A (en) | 1997-05-01 | 2000-07-18 | Stewart & Stevenson Services, Inc. | Ram type blowout preventor |
US5944110A (en) | 1997-09-11 | 1999-08-31 | Cooper Cameron Corporation | Variable bore ram packer for a ram type blowout preventer |
US5833208A (en) | 1997-09-15 | 1998-11-10 | Jm Clipper Corporation | Inner seal for ram-type blowout preventer |
US6016880A (en) | 1997-10-02 | 2000-01-25 | Abb Vetco Gray Inc. | Rotating drilling head with spaced apart seals |
US5918851A (en) | 1998-03-03 | 1999-07-06 | Cooper Cameron Corporation | Blowout preventer ram automatic locking system |
USD425525S (en) | 1998-03-10 | 2000-05-23 | Cooper Cameron Corporation, Inc. | Insert for variable bore ram blow out preventor |
US6173770B1 (en) | 1998-11-20 | 2001-01-16 | Hydril Company | Shear ram for ram-type blowout preventer |
US6006647A (en) | 1998-05-08 | 1999-12-28 | Tuboscope I/P Inc. | Actuator with free-floating piston for a blowout preventer and the like |
US5961094A (en) | 1998-06-24 | 1999-10-05 | Tuboscope I/P Inc. | Method and apparatus for replacing a packer element |
US6012528A (en) | 1998-06-24 | 2000-01-11 | Tuboscope I/P Inc. | Method and apparatus for replacing a packer element |
US6164619A (en) | 1999-01-07 | 2000-12-26 | Tuboscope I/P, Inc. | Bi-directional sealing ram |
US6276450B1 (en) | 1999-05-02 | 2001-08-21 | Varco International, Inc. | Apparatus and method for rapid replacement of upper blowout preventers |
US6192680B1 (en) | 1999-07-15 | 2001-02-27 | Varco Shaffer, Inc. | Subsea hydraulic control system |
US6454015B1 (en) | 1999-07-15 | 2002-09-24 | Abb Vetco Gray Inc. | Shearing gate valve |
US6158505A (en) | 1999-08-30 | 2000-12-12 | Cooper Cameron Corporation | Blade seal for a shearing blind ram in a ram type blowout preventer |
OA12179A (en) | 2000-02-16 | 2006-05-09 | Performance Res & Drilling Llc | Horizontal directional drilling in wells. |
US6244336B1 (en) | 2000-03-07 | 2001-06-12 | Cooper Cameron Corporation | Double shearing rams for ram type blowout preventer |
US6244560B1 (en) | 2000-03-31 | 2001-06-12 | Varco Shaffer, Inc. | Blowout preventer ram actuating mechanism |
US6367804B1 (en) | 2000-04-14 | 2002-04-09 | Cooper Cameron Corporation | Variable bore ram packer for tapered tubular members in a ram type blowout preventer |
US6484808B2 (en) | 2000-06-09 | 2002-11-26 | Varco I/P, Inc. | Stripper/packer |
FR2810701B1 (en) | 2000-06-27 | 2002-12-13 | Hydraulique Production Systems | DOUBLE ACTING HYDRAULIC CYLINDER WITH AXIAL LOCKING DEVICE |
US6296225B1 (en) | 2000-06-29 | 2001-10-02 | Cooper Cameron Corporation | Ram bore profile for variable bore packer ram in a ram type blowout preventer |
JP4438203B2 (en) | 2000-09-12 | 2010-03-24 | 株式会社デンソー | Pipe drilling method and apparatus |
US6374925B1 (en) | 2000-09-22 | 2002-04-23 | Varco Shaffer, Inc. | Well drilling method and system |
US6510895B1 (en) | 2000-11-06 | 2003-01-28 | Fmc Technologies | Energized sealing cartridge for annulus sealing between tubular well components |
US6554016B2 (en) | 2000-12-12 | 2003-04-29 | Northland Energy Corporation | Rotating blowout preventer with independent cooling circuits and thrust bearing |
US6509733B2 (en) | 2000-12-20 | 2003-01-21 | Caterpillar Inc | Fluid cylinder with embedded positioning sensor |
US6601650B2 (en) | 2001-08-09 | 2003-08-05 | Worldwide Oilfield Machine, Inc. | Method and apparatus for replacing BOP with gate valve |
US7096960B2 (en) | 2001-05-04 | 2006-08-29 | Hydrill Company Lp | Mounts for blowout preventer bonnets |
US6845959B2 (en) * | 2001-05-04 | 2005-01-25 | Hydril Company, L.P. | Quick release blowout preventer bonnet |
US6554247B2 (en) | 2001-05-04 | 2003-04-29 | Hydril Company | Quick release blowout preventer bonnet |
US6510897B2 (en) | 2001-05-04 | 2003-01-28 | Hydril Company | Rotational mounts for blowout preventer bonnets |
US6530432B2 (en) | 2001-07-11 | 2003-03-11 | Coiled Tubing Solutions, Inc. | Oil well tubing injection system and method |
US6651746B2 (en) | 2001-11-26 | 2003-11-25 | Anthony R. Boyd | High torque and high capacity rotatable center core and floatable sealed body assemblies with universals ram applications and method |
EP1319800B1 (en) | 2001-12-12 | 2006-02-22 | Cooper Cameron Corporation | Borehole equipment position detection system |
BR0206084B1 (en) | 2001-12-17 | 2013-08-27 | "subsea production system, and cutting module adapted to cut pipe in a well." | |
US6834721B2 (en) | 2002-01-14 | 2004-12-28 | Halliburton Energy Services, Inc. | System for disconnecting coiled tubing |
NO316189B1 (en) | 2002-01-16 | 2003-12-22 | Norsk Hydro As | Riser control device |
WO2003070565A2 (en) | 2002-02-19 | 2003-08-28 | Preston Fox | Subsea intervention system, method and components thereof |
US6742597B2 (en) | 2002-05-20 | 2004-06-01 | Varco I/P | Safety check valve for coiled tubing |
US6719042B2 (en) | 2002-07-08 | 2004-04-13 | Varco Shaffer, Inc. | Shear ram assembly |
US20040021269A1 (en) | 2002-08-01 | 2004-02-05 | Cooper Cameron Corporation | Compact insert for variable bore ram packer in a ram type blowout preventer |
US6843463B1 (en) | 2002-08-30 | 2005-01-18 | Varco I/P/ Inc. | Pressure regulated slip ram on a coil tubing blowout preventer |
US6955357B2 (en) | 2002-10-07 | 2005-10-18 | Cooper Cameron Corporation | Extended range variable bore ram packer for a ram type blowout preventer |
US20040124380A1 (en) | 2002-10-29 | 2004-07-01 | Van Winkle Denzal Wayne | Articulated slip ram for tapered coiled tubing |
CA2411129C (en) | 2002-11-05 | 2006-06-27 | Vanoil Equipment Inc. | Method of sealing pressure within a blowout preventer and a blowout preventer |
US7023199B2 (en) | 2002-12-31 | 2006-04-04 | Caterpillar Inc. | Position sensing cylinder cap for ease of service and assembly |
US6857634B2 (en) | 2003-02-20 | 2005-02-22 | Varco Shaffer, Inc. | BOP assembly with metal inserts |
WO2004099656A1 (en) | 2003-05-02 | 2004-11-18 | Varian, Inc. | Gate valve |
US6974135B2 (en) | 2003-07-11 | 2005-12-13 | Varco I/P Inc. | Variable bore ram |
US7225793B2 (en) | 2003-08-14 | 2007-06-05 | Electrojet, Inc. | Engine timing control with intake air pressure sensor |
GB0319317D0 (en) | 2003-08-16 | 2003-09-17 | Maris Tdm Ltd | Method and apparatus for drilling |
US7100892B2 (en) | 2003-08-26 | 2006-09-05 | Kitz Sct Corporation | Non-rubbing gate valve for semiconductor fabrication apparatus |
US7159652B2 (en) | 2003-09-04 | 2007-01-09 | Oil States Energy Services, Inc. | Drilling flange and independent screwed wellhead with metal-to-metal seal and method of use |
US7036613B2 (en) | 2003-09-12 | 2006-05-02 | Reedhycalog, L.P. | Lip seal for roller cone drill bit |
US7011159B2 (en) | 2003-09-16 | 2006-03-14 | Hydril Company, L.P. | Compact mid-grip fastener |
GB2411191B (en) | 2003-10-09 | 2006-07-19 | Varco Int | Variable size coil tubing gripping elements |
CA2445468C (en) | 2003-10-17 | 2008-04-01 | L. Murray Dallas | Metal ring gasket for a threaded union |
US7287544B2 (en) | 2003-10-21 | 2007-10-30 | Varco I/P, Inc. | Triple valve blow out preventer |
WO2005045547A1 (en) | 2003-11-10 | 2005-05-19 | Tokyo Denki University | Solar photovoltaic power generation apparatus |
PL2518259T3 (en) | 2003-12-31 | 2014-12-31 | Varco I/P Inc | Instrumented internal blowout preventer valve for measuring drill string drilling parameters |
US7334634B1 (en) | 2004-02-02 | 2008-02-26 | Leo William Abel | High pressure adaptor assembly for use on blow out preventors |
US7395867B2 (en) | 2004-03-17 | 2008-07-08 | Stinger Wellhead Protection, Inc. | Hybrid wellhead system and method of use |
US20050242519A1 (en) | 2004-04-29 | 2005-11-03 | Koleilat Bashir M | Wedge seal |
US7051989B2 (en) | 2004-04-30 | 2006-05-30 | Varco I/P, Inc. | Blowout preventer and movable ram block support |
US6969042B2 (en) | 2004-05-01 | 2005-11-29 | Varco I/P, Inc. | Blowout preventer and ram actuator |
US7121185B2 (en) | 2004-05-28 | 2006-10-17 | Caterpillar Inc. | Hydraulic cylinder having a snubbing valve |
US7051990B2 (en) | 2004-07-01 | 2006-05-30 | Varco I/P, Inc. | Blowout preventer and movable bonnet support |
US7354026B2 (en) | 2004-08-17 | 2008-04-08 | Cameron International Corporation | Unitary blade seal for a shearing blind ram in a ram type blowout preventer |
US20060076526A1 (en) | 2004-10-13 | 2006-04-13 | Varco I/P, Inc. | Anodic Protective Seal in a Blowout Preventer |
US7703739B2 (en) | 2004-11-01 | 2010-04-27 | Hydril Usa Manufacturing Llc | Ram BOP shear device |
US7234530B2 (en) | 2004-11-01 | 2007-06-26 | Hydril Company Lp | Ram BOP shear device |
US7243713B2 (en) | 2004-11-29 | 2007-07-17 | National-Oilwell Dht, L.P. | Shear/seal ram assembly for a ram-type blowout prevention system |
US7360603B2 (en) | 2004-11-30 | 2008-04-22 | Varco I/P, Inc. | Methods and apparatuses for wellbore operations |
US7350587B2 (en) | 2004-11-30 | 2008-04-01 | Varco I/P, Inc. | Pipe guide |
US7055594B1 (en) | 2004-11-30 | 2006-06-06 | Varco I/P, Inc. | Pipe gripper and top drive systems |
JP2006187817A (en) | 2004-12-28 | 2006-07-20 | Fuji Photo Film Co Ltd | Guillotine cutter and tape sticking device |
US20060144586A1 (en) | 2004-12-30 | 2006-07-06 | Cooper Cameron Corporation | Shearing blind ram assembly with a fish pocket |
US7195224B2 (en) | 2005-02-01 | 2007-03-27 | Varco I/P, Inc. | Blowout preventer and locking mechanism |
US7464765B2 (en) | 2005-08-24 | 2008-12-16 | National-Oilwell Dht, L.P. | Inner guide seal assembly and method for a ram type BOP system |
US7523644B2 (en) | 2005-09-08 | 2009-04-28 | Varco I/P | Method and apparatus for verifying the integrity of a joint seal |
US7216872B1 (en) | 2005-10-28 | 2007-05-15 | Oceaneering International, Inc. | Seal for use with pipe and flange assemblies |
US7331562B2 (en) | 2005-11-07 | 2008-02-19 | Varco I/P, Inc. | Blowout preventer with breech assembly |
US7410003B2 (en) | 2005-11-18 | 2008-08-12 | Bj Services Company | Dual purpose blow out preventer |
CN201008733Y (en) | 2005-12-08 | 2008-01-23 | 张宜冰 | Portable spelling-puzzle award shooting game device |
US7673674B2 (en) | 2006-01-31 | 2010-03-09 | Stream-Flo Industries Ltd. | Polish rod clamping device |
US20080189954A1 (en) | 2006-04-04 | 2008-08-14 | Yung Sheng Lin | Pipe cutter |
US8113544B2 (en) | 2006-04-07 | 2012-02-14 | Hydril Usa Manufacturing Llc | Rotating fluid union |
US7367396B2 (en) | 2006-04-25 | 2008-05-06 | Varco I/P, Inc. | Blowout preventers and methods of use |
US7401664B2 (en) | 2006-04-28 | 2008-07-22 | Varco I/P | Top drive systems |
US7487848B2 (en) | 2006-04-28 | 2009-02-10 | Varco I/P, Inc. | Multi-seal for top drive shaft |
US7181808B1 (en) | 2006-05-31 | 2007-02-27 | Denzal Wayne Van Winkle | Buckle or clasp |
US20080040070A1 (en) | 2006-08-11 | 2008-02-14 | Varco I/P, Inc. | Position Indicator for a Blowout Preventer |
US7520129B2 (en) | 2006-11-07 | 2009-04-21 | Varco I/P, Inc. | Subsea pressure accumulator systems |
US8740174B2 (en) | 2006-12-12 | 2014-06-03 | Hydril Usa Manufacturing Llc | Dual-direction ram-type blowout preventer seal |
US7926501B2 (en) | 2007-02-07 | 2011-04-19 | National Oilwell Varco L.P. | Subsea pressure systems for fluid recovery |
US8464525B2 (en) | 2007-02-07 | 2013-06-18 | National Oilwell Varco, L.P. | Subsea power fluid recovery systems |
US7832706B2 (en) | 2007-02-16 | 2010-11-16 | Hydrill USA Manufacturing LLC | RAM BOP position sensor |
US7980305B2 (en) * | 2007-02-16 | 2011-07-19 | Hydril Usa Manufacturing Llc | Ram BOP position sensor |
US7798466B2 (en) | 2007-04-27 | 2010-09-21 | Varco I/P, Inc. | Ram locking blowout preventer |
CA2599402C (en) | 2007-08-28 | 2015-05-05 | Darwell Industries Ltd. | Method of forming a blowout preventer body |
US8033338B2 (en) | 2008-01-22 | 2011-10-11 | National Oilwell Varco, L.P. | Wellbore continuous circulation systems and method |
US8181697B2 (en) | 2008-08-15 | 2012-05-22 | National Oilwell Varco L.P. | Multi-function multi-hole drilling rig |
US8844898B2 (en) | 2009-03-31 | 2014-09-30 | National Oilwell Varco, L.P. | Blowout preventer with ram socketing |
US8567490B2 (en) | 2009-06-19 | 2013-10-29 | National Oilwell Varco, L.P. | Shear seal blowout preventer |
US7967299B2 (en) | 2009-07-16 | 2011-06-28 | National Oilwell Varco, L.P. | Body to bonnet seal on a blowout preventer |
US8540017B2 (en) * | 2010-07-19 | 2013-09-24 | National Oilwell Varco, L.P. | Method and system for sealing a wellbore |
-
2010
- 2010-07-19 US US12/838,776 patent/US8540017B2/en active Active
-
2011
- 2011-07-01 BR BR112013001382A patent/BR112013001382A2/en not_active Application Discontinuation
- 2011-07-01 CA CA2806019A patent/CA2806019C/en not_active Expired - Fee Related
- 2011-07-01 EP EP11810143.5A patent/EP2596206A4/en not_active Withdrawn
- 2011-07-01 WO PCT/US2011/042864 patent/WO2012012193A1/en active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4582293A (en) * | 1982-01-06 | 1986-04-15 | Koomey Blowout Preventers, Inc. | Hydraulically operated valves |
WO2006014895A2 (en) * | 2004-07-27 | 2006-02-09 | T-3 Property Holdings, Inc. | Shearing sealing ram |
US7510002B2 (en) * | 2004-11-13 | 2009-03-31 | Hunting Cromar Limited | Apparatus and method for sealing a wellbore |
US20060278406A1 (en) * | 2005-06-08 | 2006-12-14 | Judge Robert A | Rod lock for ram blowout preventers |
Non-Patent Citations (1)
Title |
---|
See also references of EP2596206A4 * |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
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US9045961B2 (en) | 2011-01-31 | 2015-06-02 | National Oilwell Varco, L.P. | Blowout preventer seal and method of using same |
WO2013155191A2 (en) | 2012-04-10 | 2013-10-17 | National Oilwell Varco, L.P. | Blowout preventer seal assembly and method of using same |
WO2013155206A2 (en) | 2012-04-10 | 2013-10-17 | National Oilwell Varco, L.P. | Blowout preventer with locking ram assembly and method of using same |
US9175541B2 (en) | 2012-04-10 | 2015-11-03 | National Oilwell Varco, L.P. | Blowout preventer seal assembly and method of using same |
USRE47771E1 (en) | 2012-04-10 | 2019-12-17 | National Oilwell Varco, L.P. | Blowout preventer with locking ram assembly and method of using same |
Also Published As
Publication number | Publication date |
---|---|
BR112013001382A2 (en) | 2016-05-24 |
CA2806019A1 (en) | 2012-01-26 |
EP2596206A4 (en) | 2017-12-20 |
US20120012340A1 (en) | 2012-01-19 |
EP2596206A1 (en) | 2013-05-29 |
CA2806019C (en) | 2017-01-24 |
US8540017B2 (en) | 2013-09-24 |
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