CN110924891B - Movable double-rubber-core underwater annular blowout preventer - Google Patents
Movable double-rubber-core underwater annular blowout preventer Download PDFInfo
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- CN110924891B CN110924891B CN201911292574.XA CN201911292574A CN110924891B CN 110924891 B CN110924891 B CN 110924891B CN 201911292574 A CN201911292574 A CN 201911292574A CN 110924891 B CN110924891 B CN 110924891B
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- 238000005553 drilling Methods 0.000 claims abstract description 67
- 238000007789 sealing Methods 0.000 claims abstract description 16
- 230000007246 mechanism Effects 0.000 claims description 11
- 239000012141 concentrate Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 22
- 238000010276 construction Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 20
- 238000000034 method Methods 0.000 description 5
- 238000010008 shearing Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- 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
- 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
- E21B33/064—Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers specially adapted for underwater well heads
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
Abstract
The invention relates to the technical field of marine drilling equipment, and discloses a movable double-rubber-core underwater annular blowout preventer, which comprises a shell, two connecting flange plates and a drilling tool, wherein the two connecting flange plates are fixedly arranged at the top and the bottom of the shell respectively, and the drilling tool penetrates through the middle part of the shell. Through the setting of activity blowout preventer and fixed blowout preventer for carry out double sealing to the pit shaft, the well sealing effect has been strengthened, the possibility that the blowout takes place has been reduced, increase the security of drilling and workover construction operation, simultaneously through the setting of sliding sleeve, piston cylinder and oil plug two, make the activity blowout preventer reciprocate in the casing, and make the drilling tool play in the well, when drilling down, can open the gluey core among the fixed blowout preventer and close the gluey core among the activity blowout preventer, and make the activity blowout preventer follow the drilling tool and reciprocate, reduce the removal between gluey core and the drilling tool, and reduce the friction between the two.
Description
Technical Field
The invention relates to the technical field of marine drilling equipment, in particular to a movable double-rubber-core underwater annular blowout preventer.
Background
An annular blowout preventer, also called a universal blowout preventer, is an important component of a well control device, is mainly used for controlling the pressure of a well head in operations such as drilling, well workover, oil testing and the like and preventing well blowout accidents from happening, and the working principle of the annular blowout preventer is shown in the attached figure 6: let in hydraulic oil from oil plug 4 for 3 rises of piston block and extrude rubber core 2, make rubber core 2 concentrate to the middle part, form airtight space, thereby form the well head and seal, simultaneously, annular preventer's main function has: when a drilling tool is arranged in a well, annular spaces with different sizes can be sealed; when no drilling tool is arranged in the well, the well mouth can be fully closed; when drilling, coring and logging operations are carried out, if blowout occurs, an annular space formed by a kelly bar, a coring tool, a cable, a steel wire rope and the like and a shaft can be sealed; fourthly, under the matching of the pressure reducing and regulating valve and the buffer energy storage device, the drilling rod can be forcibly tripped up and down through 18-degree butt welding without fine buttons, but the drilling rod has some defects in the using process, as follows;
when a drilling tool is arranged in a well, the drilling tool is in a certain bending state, the eccentricity is large when the drilling tool is in contact with the rubber core 2, the rubber core 2 cannot seal the space where the drilling tool is located, and sealing failure is caused, meanwhile, when the rubber core 2 is in a well sealing state, the drilling tool is forcibly started and lowered for many times, the rubber core 2 is subjected to alternating shearing stress on different cylindrical sections, the shearing stress is larger when the rubber core is closer to the inner wall, and the rubber fatigue shearing strength is only 20% -30% of the static shearing strength, so that the rubber fatigue shearing failure is easily caused when the drilling tool is forcibly started and lowered for many times, the large degumming phenomenon of the inner wall of the rubber core 2 occurs, the rubber core 2 is damaged, and blowout is caused.
Disclosure of Invention
The invention provides a movable double-rubber-core underwater annular blowout preventer which has the advantages of excellent structural performance and good sealing effect and solves the problems in the background technology.
The invention provides the following technical scheme: the utility model provides a movable two rubber core annular preventer under water, includes casing, connection flange dish and drilling tool, the connection flange dish has two, and respectively fixed mounting is in the top and the bottom of casing, the drilling tool passes from the middle part of casing, the top of casing has seted up the outer tube that slides, the length of the outer tube that slides is H1, the middle part of casing has seted up movable box, the inside movable mounting of movable box has the activity blowout preventer, the last fixed surface of activity blowout preventer is connected with the inner tube that slides, the length of the inner tube that slides is H2, the bottom surface fixedly connected with piston tube of activity blowout preventer, the length of piston tube is H3, the last activity of piston tube cup joints the sleeve that slides, the top and the movable box fixed connection of sleeve that slides, fixedly connected with oil plug two on the sleeve that slides, the bottom fixed mounting of casing has the fixed blowout preventer, and is fixedly connected with the bottom end of the sliding sleeve, and the top and the bottom of the shell are respectively and fixedly provided with a supporting device.
Preferably, the movable blowout preventer and the fixed blowout preventer respectively comprise a rubber core, a piston block and an oil plug, and the specific mounting structure is the prior art, which is not described herein.
Preferably, the length H1 of the sliding outer cylinder is equal to the length H2 of the sliding inner cylinder and the length H3 of the piston cylinder, and both are 500mm-1000mm, the maximum diameter of the sliding inner cylinder is equal to the minimum diameter of the sliding outer cylinder, the sliding outer cylinder and the sliding inner cylinder are assembled in an interference fit mode, and the sliding sleeve and the piston cylinder are assembled in an interference fit mode.
Preferably, a movable cavity is formed in the movable box body, an oil pipe is movably mounted in the movable cavity, one end of the oil pipe is fixedly connected with the oil plug, and the other end of the oil pipe penetrates through the movable box body and is connected with an external hydraulic system.
Preferably, the top and the bottom of the outer wall of the movable blowout preventer are respectively and uniformly and fixedly provided with three sliding wheels, and each sliding wheel consists of a traveling wheel and a spring.
Preferably, strutting arrangement includes piston rod, link mechanism and support frame, strutting arrangement has two sets ofly and the symmetry is respectively fixed in the top and the bottom of casing, fixed mounting is upwards to the strutting arrangement at casing top soon, fixed mounting is downwards to the strutting arrangement of casing bottom soon, the total three and evenly distributed of strutting arrangement every group is on the casing, piston rod and casing interference fit, the one end of piston rod is cup jointed with link mechanism's one end activity, link mechanism's the other end is cup jointed with the middle part activity of support frame, the support frame is cup jointed with the inner wall activity of casing.
Preferably, the length of the scaffolding plus the radius of the drilling tool is greater than the radius of the wellbore.
Preferably, the bottom of the inner cavity of the movable box body is fixedly provided with a rubber cushion.
Preferably, the outer side of the top of the movable box body, the outer side of the top of the sliding inner cylinder and the movable connection part of the sliding sleeve and the piston cylinder are respectively and fixedly provided with a sealing ring.
The invention has the following beneficial effects:
1. through the setting of activity blowout preventer and fixed blowout preventer, make carry out double sealing to the pit shaft, the well sealing effect has been strengthened, the possibility that the blowout takes place has been reduced, increase the security of drilling and workover construction operation, simultaneously through the setting of sliding sleeve, piston cylinder and oil plug two, make the activity blowout preventer reciprocate in the casing, and make the drilling tool play in the well, when drilling down, can open the gluey core among the fixed blowout preventer and close the gluey core among the activity blowout preventer, and make the activity blowout preventer follow the drilling tool and reciprocate, reduce the removal between gluey core and the drilling tool, and reduce the friction between the two, increase the life of gluey core, reduce cost of maintenance.
2. Through the setting of strutting arrangement for strutting arrangement stretches the drilling tool in the casing, makes it present straight state in the casing, and makes the drilling tool concentrate to the middle part of casing, has eliminated the eccentric state of drilling tool, increases the sealed between rubber core and the drilling tool, and the leakproofness when effectively increasing the drilling tool has in the well, further reduces the possibility that sealed became invalid, has also increased the security of well drilling operation simultaneously.
Drawings
FIG. 1 is a schematic sectional elevation view of the structure of the present invention;
FIG. 2 is a schematic view of a structural support frame of the present invention;
FIG. 3 is a schematic view of the invention at A in FIG. 1;
FIG. 4 is a schematic view of the invention at B in FIG. 1;
FIG. 5 is a schematic view of the invention at C in FIG. 1;
fig. 6 is a schematic diagram of a conventional structure.
In the figure: 1. a housing; 2. a rubber core; 3. a piston block; 4. a first oil plug; 5. connecting a flange plate; 6. drilling tools; 8. a sliding outer cylinder; 9. a movable box body; 10. a sliding inner cylinder; 11. a support device; 111. a piston rod; 112. a link mechanism; 113. a support frame; 12. a movable blowout preventer; 13. fixing the blowout preventer; 14. a sliding sleeve; 15. a piston cylinder; 16. a second oil plug; 17. a sliding wheel; 18. a movable cavity; 19. And (4) an oil pipe.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, a movable double rubber core underwater annular blowout preventer comprises a housing 1, two connecting flange discs 5 and two drilling tools 6, wherein the two connecting flange discs 5 are respectively and fixedly installed at the top and the bottom of the housing 1, the drilling tool 6 penetrates through the middle of the housing 1, the top of the housing 1 is provided with a sliding outer cylinder 8, the length of the sliding outer cylinder 8 is H1, the middle of the housing 1 is provided with a movable box body 9, a movable blowout preventer 12 is movably installed in the movable box body 9, the upper surface of the movable blowout preventer 12 is fixedly connected with a sliding inner cylinder 10, the length of the sliding inner cylinder 10 is H2, the bottom surface of the movable blowout preventer 12 is fixedly connected with a piston cylinder 15, the length of the piston cylinder 15 is H3, a sliding sleeve 14 is movably sleeved on the piston cylinder 15, the top end of the sliding sleeve 14 is fixedly connected with the movable box body 9, a second oil plug 16 is fixedly connected on the sliding sleeve 14, the bottom of the shell 1 is fixedly provided with a fixed blowout preventer 13 and is fixedly connected with the bottom end of a sliding sleeve 14, and the top and the bottom of the shell 1 are respectively and fixedly provided with a support device 11.
Wherein, activity blowout preventer 12 and fixed blowout preventer 13 are prior known technology including its specific mounting structure of rubber core 2, piston piece 3 and oil plug 4 respectively, do not add here and do not add any more and describe, and both can independently seal the pit shaft, and both work together, have carried out double sealing to the pit shaft, further strengthen sealed effect, reduce the possibility that the blowout takes place.
The length H1 of the sliding outer cylinder 8 is equal to the length H2 of the sliding inner cylinder 10 and the length H3 of the piston cylinder 15, the lengths are 500mm-1000mm, the maximum diameter of the sliding inner cylinder 10 is equal to the minimum diameter of the sliding outer cylinder 8, the sliding outer cylinder 8 and the sliding inner cylinder 10 are in interference fit, the sliding sleeve 14 and the piston cylinder 15 are in interference fit, when hydraulic oil is injected between the sliding sleeve 14 and the piston cylinder 15 through the oil plug II 16, the piston cylinder 15 moves for a stroke in the sliding sleeve 14, the movable blowout preventer 12 is driven to slide, the stroke precision of the movable blowout preventer 12 is ensured, the drilling and tripping of the drilling tool 6 are accurately controlled, the control difficulty of the device is reduced, and the sealing performance of the device during sliding is ensured.
Wherein, the inside of activity box 9 has seted up movable chamber 18, and movable mounting has oil pipe 19 in the movable chamber 18, and one end and the oil plug 4 fixed connection of oil pipe 19, the other end of oil pipe 19 run through activity box 9 and be connected with outside hydraulic system.
When the movable blowout preventer 12 slides, the friction force between the outer wall of the movable blowout preventer 12 and the inner wall of the movable box body 9 is reduced, the friction loss between the outer wall of the movable blowout preventer 12 and the inner wall of the movable box body 9 is reduced, the service life of the device is prolonged, the maintenance cost is reduced, and meanwhile, the consumption of hydraulic power is reduced, and the operation cost is reduced.
Wherein, the supporting device 11 comprises a piston rod 111, a link mechanism 112 and a supporting frame 113, two groups of supporting devices 11 are respectively and symmetrically fixed at the top and the bottom of the casing 1, the supporting device 11 fixedly installed at the top of the casing 1 is turned upwards, the supporting device 11 fixedly installed at the bottom of the casing 1 is turned downwards, three groups of supporting devices 11 are uniformly distributed on the casing 1, the piston rod 111 is in interference fit with the casing 1, one end of the piston rod 111 is movably sleeved with one end of the link mechanism 112, the other end of the link mechanism 112 is movably sleeved with the middle part of the supporting frame 113, the supporting frame 113 is movably sleeved with the inner wall of the casing 1, when the drilling tool 6 enters the casing 1, the supporting device 11 at the top of the casing 1 concentrates the drilling tool 6 towards the middle part and supports upwards, the supporting device 11 at the bottom of the casing 1 also concentrates and supports downwards the drilling tool 6 towards the middle part, so that the drilling tool 6 is in a state of being straightened in the casing 1, is beneficial to the sealing of the rubber core 2.
Wherein the length of the support 113 plus the radius of the drilling tool 6 is greater than the radius of the wellbore.
Wherein, the bottom of the inner cavity of the movable box body 9 is fixedly provided with a rubber cushion, which can reduce the collision between the movable blowout preventer 12 and the movable box body 9 and increase the safety of the device.
Wherein, the outside of the top of the movable box body 9, the outside of the top of the sliding inner cylinder 10 and the movable connection part of the sliding sleeve 14 and the piston cylinder 15 are respectively and fixedly provided with a sealing ring, so that the sealing performance of the device is improved.
Principle of operation
Firstly, when a drilling tool 6 is in the well and the drilling operation is not carried out, the drilling tool 6 penetrates through the middle part of the shell 1, the supporting device 11 is pressurized firstly, the piston rod 111 pushes the connecting rod mechanism 112, the supporting frame 113 is contacted with the drilling tool 6, the supporting device 11 at the top part of the shell 1 supports the drilling tool 6 upwards, the supporting device 11 at the bottom part of the shell 1 supports the drilling tool 6 downwards, so that the drilling tool 6 in the shell 1 is straightened, and then the rubber core 2 in the movable blowout preventer 12 and the fixed blowout preventer 13 respectively seals the drilling tool 6 under the action of the piston block 3.
Secondly, when the sealed drilling tool 6 needs to be subjected to the drilling raising and lowering operation, the rubber core 2 in the fixed blowout preventer 13 is opened, the oil plug II 16 is used for pressurizing the space between the sliding sleeve 14 and the piston cylinder 15, so that the sliding sleeve 14 slides between the piston cylinder 15 and further moves along with the drilling tool 6, after the movable blowout preventer 12 moves for one stroke, the rubber core 2 in the fixed blowout preventer 13 is closed, then the movable blowout preventer 12 returns to perform the next stroke, and therefore the drilling tool 6 is repeatedly subjected to the drilling raising and lowering operation in the well sealing state.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a two rubber core of movable annular preventer under water, includes casing (1), connection ring flange (5) and drilling tool (6), connection ring flange (5) have two, and respectively fixed mounting is at the top and the bottom of casing (1), drilling tool (6) are passed from the middle part of casing (1), its characterized in that: the top of the shell (1) is provided with a sliding outer cylinder (8), the length of the sliding outer cylinder (8) is H1, the middle of the shell (1) is provided with a movable box body (9), a movable blowout preventer (12) is movably mounted inside the movable box body (9), the upper surface of the movable blowout preventer (12) is fixedly connected with a sliding inner cylinder (10), the length of the sliding inner cylinder (10) is H2, the bottom surface of the movable blowout preventer (12) is fixedly connected with a piston cylinder (15), the length of the piston cylinder (15) is H3, a sliding sleeve (14) is movably sleeved on the piston cylinder (15), the top end of the sliding sleeve (14) is fixedly connected with the movable box body (9), an oil plug II (16) is fixedly connected on the sliding sleeve (14), and a fixed blowout preventer (13) is fixedly mounted at the bottom of the shell (1), the sliding sleeve is fixedly connected with the bottom end of the sliding sleeve (14), and the top and the bottom of the shell (1) are respectively and fixedly provided with a supporting device (11); the top and the bottom of the outer wall of the movable blowout preventer (12) are respectively and uniformly and fixedly provided with three sliding wheels (17), and each sliding wheel (17) consists of a traveling wheel and a spring; when the movable blowout preventer (12) slides, reducing the friction force between the outer wall of the movable blowout preventer (12) and the inner wall of the movable box body (9);
the supporting device (11) comprises a piston rod (111), a link mechanism (112) and a supporting frame (113), two groups of supporting devices (11) are respectively and symmetrically fixed at the top and the bottom of the shell (1), the supporting device (11) fixedly installed at the top of the shell (1) rotates upwards, the supporting device (11) fixedly installed at the bottom of the shell (1) rotates downwards, three supporting devices (11) are uniformly distributed on the shell (1) in total, the piston rod (111) is in interference fit with the shell (1), one end of the piston rod (111) is movably sleeved with one end of the link mechanism (112), the other end of the link mechanism (112) is movably sleeved with the middle of the supporting frame (113), and the supporting frame (113) is movably sleeved with the inner wall of the shell (1); when the drilling tool (6) enters the shell (1), the supporting device (11) at the top of the shell (1) concentrates the drilling tool (6) towards the middle part and supports the drilling tool upwards, and the supporting device (11) at the bottom of the shell (1) also concentrates the drilling tool (6) towards the middle part and supports the drilling tool downwards, so that the drilling tool (6) is in a straight state in the shell (1), and the sealing of the rubber core (2) is facilitated;
the length of the support frame (113) plus the radius of the drilling tool (6) is greater than the radius of the shaft.
2. The moveable dual-spool subsea annular blowout preventer of claim 1, wherein: the movable blowout preventer (12) and the fixed blowout preventer (13) respectively comprise a rubber core (2), a piston block (3) and a first oil plug (4).
3. The moveable dual-spool subsea annular blowout preventer of claim 1, wherein: the length H1 of sliding outer cylinder (8) is equal to the length H2 of sliding inner cylinder (10) and the length H3 of piston cylinder (15) and is 500mm-1000mm, the maximum diameter of sliding inner cylinder (10) is the same as the minimum diameter of sliding outer cylinder (8), the assembly between sliding outer cylinder (8) and sliding inner cylinder (10) is interference fit, and the assembly between sliding sleeve (14) and piston cylinder (15) is interference fit.
4. The moveable dual-spool subsea annular blowout preventer of claim 1, wherein: the movable oil pipe is characterized in that a movable cavity (18) is formed in the movable box body (9), an oil pipe (19) is movably mounted in the movable cavity (18), one end of the oil pipe (19) is fixedly connected with the oil plug I (4), and the other end of the oil pipe (19) penetrates through the movable box body (9) and is connected with an external hydraulic system.
5. The moveable dual-spool subsea annular blowout preventer of claim 1, wherein: the bottom of the inner cavity of the movable box body (9) is fixedly provided with a rubber cushion.
6. The moveable dual-spool subsea annular blowout preventer of claim 1, wherein: and sealing rings are respectively and fixedly arranged on the outer side of the top of the movable box body (9), the outer side of the top of the sliding inner cylinder (10) and the movable connection part of the sliding sleeve (14) and the piston cylinder (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911292574.XA CN110924891B (en) | 2019-12-12 | 2019-12-12 | Movable double-rubber-core underwater annular blowout preventer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911292574.XA CN110924891B (en) | 2019-12-12 | 2019-12-12 | Movable double-rubber-core underwater annular blowout preventer |
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| CN110924891A CN110924891A (en) | 2020-03-27 |
| CN110924891B true CN110924891B (en) | 2022-04-19 |
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| CN201911292574.XA Active CN110924891B (en) | 2019-12-12 | 2019-12-12 | Movable double-rubber-core underwater annular blowout preventer |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111622705B (en) * | 2020-07-28 | 2020-10-16 | 东营市正能石油科技有限公司 | Universal annular blowout preventer for oil field wellhead |
| CN112647888B (en) * | 2021-03-12 | 2021-08-06 | 东营政阳自动化科技有限公司 | Combined annular blowout preventer for petroleum drilling |
| CN115075766B (en) * | 2022-08-16 | 2023-05-26 | 泰州市玉鸽工索机具有限公司 | Pumping steel wire rope blowout preventer for oil field |
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| US4602794A (en) * | 1980-06-05 | 1986-07-29 | Nl Industries, Inc. | Annular blowout preventer with upper and lower spherical sealing surfaces and rigid translation element |
| CN202325373U (en) * | 2011-12-07 | 2012-07-11 | 中国石油天然气集团公司 | Rotary blowout preventer rubber core assembly applicable to rotating and sealing 51/2'' drill rod |
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| US5819851A (en) * | 1997-01-16 | 1998-10-13 | Dallas; L. Murray | Blowout preventer protector for use during high pressure oil/gas well stimulation |
| EP2016254B1 (en) * | 2006-05-08 | 2017-03-22 | Mako Rentals, Inc. | Downhole swivel apparatus and method |
| CN102108845B (en) * | 2011-03-28 | 2013-12-04 | 宝鸡石油机械有限责任公司 | Rotary blowout preventer |
| CN202300296U (en) * | 2011-10-27 | 2012-07-04 | 中国石油天然气集团公司 | Double-rubber-barrel annular blowout preventer |
| CN102828720A (en) * | 2012-08-01 | 2012-12-19 | 中国石油天然气集团公司 | Sealing packer device of continuous drilling fluid circulating system |
| CN103982155B (en) * | 2014-05-23 | 2016-02-10 | 西南石油大学 | A kind of tiltable experiment well mouth sealing device |
| CN205936429U (en) * | 2016-06-27 | 2017-02-08 | 徐玉杰 | Buffering formula drilling rod connector |
| US10287841B2 (en) * | 2017-03-13 | 2019-05-14 | Cameron International Corporation | Packer for annular blowout preventer |
| CN206957630U (en) * | 2017-05-24 | 2018-02-02 | 濮阳市宏发原工贸有限公司 | A kind of dual fail-safe annular preventer |
| CN208396677U (en) * | 2018-03-21 | 2019-01-18 | 烟台杰瑞石油装备技术有限公司 | A kind of double door blowout prevention box |
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- 2019-12-12 CN CN201911292574.XA patent/CN110924891B/en active Active
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|---|---|---|---|---|
| US4602794A (en) * | 1980-06-05 | 1986-07-29 | Nl Industries, Inc. | Annular blowout preventer with upper and lower spherical sealing surfaces and rigid translation element |
| CN102892971A (en) * | 2010-04-13 | 2013-01-23 | 控制压力营运私人有限公司 | Blowout preventer assembly |
| CN202325373U (en) * | 2011-12-07 | 2012-07-11 | 中国石油天然气集团公司 | Rotary blowout preventer rubber core assembly applicable to rotating and sealing 51/2'' drill rod |
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| CN110924891A (en) | 2020-03-27 |
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