CN113153205B - Water injection packer - Google Patents
Water injection packer Download PDFInfo
- Publication number
- CN113153205B CN113153205B CN202110484510.0A CN202110484510A CN113153205B CN 113153205 B CN113153205 B CN 113153205B CN 202110484510 A CN202110484510 A CN 202110484510A CN 113153205 B CN113153205 B CN 113153205B
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- Prior art keywords
- well
- ring
- valve
- pin
- flushing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000002347 injection Methods 0.000 title claims abstract description 27
- 239000007924 injection Substances 0.000 title claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 238000011010 flushing procedure Methods 0.000 claims abstract description 53
- 230000007246 mechanism Effects 0.000 claims abstract description 34
- 238000005406 washing Methods 0.000 claims abstract description 33
- 238000007789 sealing Methods 0.000 claims abstract description 15
- 238000012856 packing Methods 0.000 claims abstract description 14
- 125000006850 spacer group Chemical group 0.000 claims abstract description 8
- 230000005540 biological transmission Effects 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- 238000004891 communication Methods 0.000 abstract description 3
- 230000000903 blocking effect Effects 0.000 abstract 3
- 238000013461 design Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 210000000078 claw Anatomy 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/126—Packers; Plugs with fluid-pressure-operated elastic cup or skirt
-
- 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
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/127—Packers; Plugs with inflatable sleeve
-
- 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
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
Landscapes
- 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)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
- Lift Valve (AREA)
Abstract
The invention provides a water injection packer which comprises an upper joint, an upper outer sleeve, a well washing mechanism, an outer pipe, a rubber cylinder, a spacer ring, an inner pipe, an upper blocking ring, a setting pin, a blocking valve, an unsetting pin, a locking mechanism, a setting piston, a sealing ring, a lower blocking ring and a lower joint, wherein the upper joint, the inner pipe and the lower joint are connected into a whole by screw threads from top to bottom; the upper end and the lower end of the inner pipe are respectively provided with a pressure transmission hole, the lower part of the upper outer sleeve is in threaded connection with the outer pipe, a well flushing mechanism is arranged inside the upper outer sleeve and comprises an upper well flushing valve, a well flushing pin, a convex packing and a lower well flushing valve, and the locking mechanism comprises a lock sleeve, a lock seat and a lock ring arranged on the lock seat. Through the water injection packer, the well flushing mechanism does not move in the setting process, effective communication of upper and lower annular spaces of the sleeve is ensured, the locking mechanism not only ensures smooth locking setting, but also prevents rebound failure, and the water injection packer also has the characteristics of simple structure, low setting pressure, safety and reliability.
Description
Technical Field
The invention relates to the technical field of underground oil production equipment, in particular to a water injection packer.
Background
In the production process of underground oil extraction, in order to improve the water injection quality of a separate injection well, people widely apply a water injection packer to an oil field.
Although the existing water injection packer can meet the basic requirements of people, the following problems are generally existed when the water injection layer is blocked and the starting pressure is high: firstly, in the packer setting process, the well washing valve is in a closed state, the oil sleeve annulus is sealed by the rubber sleeve, and the setting pressure of the packer is increased due to the incompressible water, even the reliable setting can not be carried out; and secondly, the packer usually adopts a locking claw mechanism, the thread pitch is large, and the locking claw is easy to generate adduction rebound to cause locking failure.
In order to effectively solve the problems, reduce setting pressure and ensure reliable locking setting, and further prolong the service life of a water injection string, the applicant carries out deep research on a water injection packer, and the scheme is generated.
Disclosure of Invention
In view of the above, the invention provides a water injection packer aiming at the defects of the prior art, which can effectively solve the problems of difficult setting, locking failure and the like of a high-pressure water injection layer packer and is beneficial to prolonging the service life of a water injection string.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a water injection packer comprises an upper joint, an upper outer sleeve, a well washing mechanism, an outer pipe, a rubber barrel, a spacer ring, an inner pipe, an upper retaining ring, a setting pin, a retaining valve, a deblocking pin, a locking mechanism, a setting piston, a sealing ring, a lower retaining ring and a lower joint;
the upper joint, the inner pipe and the lower joint are connected into a whole by screw threads from top to bottom; the upper end and the lower end of the inner pipe are respectively provided with a pressure transmission hole;
the lower part of the upper outer sleeve is in threaded connection with an outer pipe, and a well washing mechanism is arranged inside the upper outer sleeve;
the well washing mechanism comprises a well washing valve upper part, a well washing pin, a convex packing and a well washing valve lower part;
the upper connector is connected with the upper connector through a well washing pin on the well washing valve, and the upper part of the well washing valve is in threaded connection with the lower part of the well washing valve; the outer part of the outer pipe is sequentially sleeved with a rubber cylinder, a spacer ring, an upper baffle ring and a baffle valve from top to bottom, the upper baffle ring is connected with the outer pipe through a setting pin, and the baffle valve is limited through the outer end face of the outer pipe;
the locking mechanism comprises a lock sleeve, a lock seat and a lock ring arranged on the lock seat;
the lock seat is connected with the inner pipe through the deblocking pin, a setting piston and a sealing ring are installed between the lock sleeve and the inner pipe, the sealing ring is sleeved on the upper portion of the lower joint, and the lower portion of the lower joint is in threaded connection with a lower retaining ring.
Further, on the well-flushing valve with the top connection passes through well-flushing pin joint, on the well-flushing valve with threaded connection under the well-flushing valve, the inside on the well-flushing valve is provided with protruding type packing, the inside under the well-flushing valve is provided with interior step, be provided with the upper portion of inner tube under the well-flushing valve and can restrict the outer boss of well-flushing mechanism down distance.
Furthermore, a small-pitch sawtooth buckle is arranged between the outer part of the locking ring and the inner part of the lock sleeve, a large-pitch sawtooth buckle is arranged between the inner part of the locking ring and the outer part of the lock seat, the upper part of the lock seat is connected with the inner pipe through an unsealing pin, and a liquid discharge hole is formed in the middle of the lock sleeve.
Compared with the prior art, the invention has the beneficial effects that: the flushing mechanism comprises an upper flushing valve, a flushing pin, a convex packing and a lower flushing valve, and can ensure effective communication of annular spaces at the upper end and the lower end of a sleeve without movement in the process of setting, so that the setting pressure is reduced, and the influence of a high-pressure layer on the setting pressure is eliminated; after the setting is in place, the pressure is continuously raised to cut off the well washing pin, the well washing mechanism moves downwards to the limit station of the inner pipe, and the convex packing is matched with the inner surface of the outer pipe to seal the well washing channel, so that the setting reliability of the packer is ensured.
Secondly, the locking mechanism comprises a lock seat, a locking ring and a lock sleeve, wherein the outside of the locking ring and the inside of the lock sleeve are designed by small-pitch sawteeth, so that springback after locking is prevented; the inside of the locking ring and the outside of the locking seat adopt the design of the clearance fit of the large-pitch sawteeth, thereby ensuring the synchronous locking of the locking ring.
Thirdly, the water injection packer can effectively reduce water injection pressure and ensure reliable locking and setting, thereby prolonging the service life of a water injection string.
Drawings
FIG. 1 is a schematic view of the present invention.
In the figure: 1. an upper joint; 2. putting an outer sleeve; 3. washing the well pin; 4. a well washing valve; 5. a convex packing; 6. under a well washing valve; 7. an outer tube; 8. a rubber cylinder; 9. a spacer ring; 10. an inner tube; 11. an upper baffle ring; 12. setting the pin; 13. a stop valve; 14. unsealing the pin; 15. a lock seat; 16. a locking ring; 17. a lock sleeve; 18. setting a piston; 19. a seal ring; 20. a lower baffle ring; 21. and a lower joint.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
As shown in fig. 1, the water injection packer comprises an upper joint 1, an upper outer sleeve 2, a well washing mechanism, an outer pipe 7, a rubber cylinder 8, a spacer ring 9, an inner pipe 10, an upper retaining ring 11, a setting pin 12, a retaining valve 13, a deblocking pin 14, a locking mechanism, a setting piston 18, a sealing ring 19, a lower retaining ring 20 and a lower joint 21;
the upper joint 1, the inner pipe 10 and the lower joint 21 are connected into a whole by threads from top to bottom; the upper end and the lower end of the inner pipe 10 are respectively provided with a pressure transmission hole;
the lower part of the upper outer sleeve 2 is in threaded connection with an outer pipe 7, and a well washing mechanism is arranged inside the upper outer sleeve 2;
the well flushing mechanism comprises a well flushing valve upper part 4, a well flushing pin 3, a convex packing 5 and a well flushing valve lower part 6;
the upper well flushing valve 4 is connected with the upper connector 1 through a well flushing pin 3, and the upper well flushing valve 4 is in threaded connection with the lower well flushing valve 6; the outer part of the outer pipe 7 is sequentially sleeved with a rubber cylinder 8, a spacer ring 9, an upper retaining ring 11 and a retaining valve 13 from top to bottom, the upper retaining ring 11 is connected with the outer pipe 7 through a setting pin 12, and the retaining valve 13 is limited through the outer end face of the outer pipe 7;
the locking mechanism comprises a lock sleeve 17, a lock seat 15 and a lock ring 16 arranged on the lock seat 15;
the lock seat 15 is connected with the inner tube 10 through the deblocking pin 14, a setting piston 18 and a sealing ring 19 are installed between the lock sleeve 17 and the inner tube 10, the sealing ring 19 is sleeved on the upper portion of the lower joint 21, and the lower portion of the lower joint 21 is in threaded connection with a lower retaining ring.
The well flushing device is characterized in that the well flushing valve is provided with an upper joint 1 which is connected with the upper joint through a well flushing pin 3, the well flushing valve is provided with an upper joint 4 which is in threaded connection with a lower joint 6, the upper joint 4 of the well flushing valve is provided with a convex packing 5, the lower joint 6 of the well flushing valve is provided with an inner step, and the lower joint 6 of the well flushing valve and the upper part of the inner pipe 10 are provided with an outer boss which can limit the descending distance of the well flushing mechanism.
A small-pitch sawtooth buckle is arranged between the outer part of the lock ring 16 and the inner part of the lock sleeve 17, a large-pitch sawtooth buckle is arranged between the inner part of the lock ring 16 and the outer part of the lock seat 15, the upper part of the lock seat 15 is connected with the inner pipe 10 through the deblocking pin 14, and a liquid discharge hole is formed in the middle of the lock sleeve 17.
The upper end of the upper joint 1 is in threaded connection with an oil pipe, and the lower end of the lower joint 21 is in threaded connection with the oil pipe.
Specifically, the working principle of the invention is as follows: the inner pipe is pressurized, liquid flows into a space between a setting piston 18 and a sealing ring 19 through a pressure transfer hole at the lower part of the inner pipe 10, the setting piston 18 pushes a lock sleeve 17 and an upper retaining ring 11 to move upwards, a setting pin 12 is cut off to compress an outer pipe 7 of a rubber cylinder 8 to seal the annular space of the oil sleeve, meanwhile, a locking ring 16 is locked with the lock sleeve 17 to prevent the rubber cylinder 8 from rebounding, and the upper annular space and the lower annular space of the oil sleeve are sealed; after the setting is finished, pressure is continuously increased, liquid flows into the inner pipe 10 through a pressure transfer hole in the upper portion, a well washing pin 3 is cut off, an upper portion 4 of a well washing valve and a lower portion 6 of the well washing valve are pushed to move downwards to a limiting step outside the inner pipe 10, and meanwhile sealing is achieved through a convex packing 5.
When a well is washed, liquid flow in the oil sleeve annulus enters through the lateral hole of the outer sleeve, the upper part 4 of the well washing valve and the lower part 6 of the well washing valve are pushed to move upwards, the sealing of the convex packing 5 is relieved, and the liquid flow is transmitted to an oil layer at the lower part of the sealing rubber cylinder 8 through the inner pipe 10 and the outer pipe 7; when deblocking, the pipe column is lifted, the upper joint 1 drives the inner pipe 10 and the sealing ring 19 to move upwards, the outer pipe 7, the lock sleeve 17, the locking ring 16 and the lock seat 15 are kept still under the friction action of the rubber sleeve 8, the deblocking pin 14 is cut off, the rubber sleeve 8 rebounds, and the upper annulus and the lower annulus of the oil sleeve are communicated.
The well flushing mechanism has the advantages that the well flushing mechanism comprises a well flushing valve upper part 4, a well flushing pin 3, a convex packing 5 and a well flushing valve lower part 6, and in the process of setting, the well flushing mechanism can ensure effective communication of annular spaces at the upper end and the lower end of a sleeve without movement, so that the setting pressure is reduced, and the influence of a high-pressure layer on the setting pressure is eliminated; after the setting is in place, the well washing pin 3 is continuously sheared by lifting and pressing, the well washing mechanism descends to the limiting platform of the inner pipe 10, the convex packing 5 is matched with the inner surface of the outer pipe 7 to seal the well washing channel, and the setting reliability of the packer is guaranteed.
The locking mechanism has the advantages that the locking mechanism comprises a lock seat 15, a locking ring 16 and a lock sleeve 17, the outside of the locking ring 16 and the inside of the lock sleeve 17 adopt a small-pitch sawtooth design, and rebound after locking is prevented; the inside of the locking ring 16 and the outside of the lock seat 15 adopt the design of large-pitch sawtooth clearance fit, thereby ensuring the synchronous locking of the locking ring 16.
The water injection packer disclosed by the invention can effectively reduce the water injection pressure and ensure reliable locking setting, thereby prolonging the service life of a water injection string.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (3)
1. A water injection packer is characterized in that: the well flushing device comprises an upper joint (1), an upper outer sleeve (2), a well flushing mechanism, an outer pipe (7), a rubber cylinder (8), a spacer ring (9), an inner pipe (10), an upper retaining ring (11), a setting pin (12), a retaining valve (13), an unsealing pin (14), a locking mechanism, a setting piston (18), a sealing ring (19), a lower retaining ring (20) and a lower joint (21);
the upper joint (1), the inner pipe (10) and the lower joint (21) are connected into a whole by screw threads from top to bottom; the upper end and the lower end of the inner pipe (10) are respectively provided with a pressure transmission hole;
the lower part of the upper outer sleeve (2) is in threaded connection with an outer pipe (7), and a well washing mechanism is arranged inside the upper outer sleeve (2);
the well washing mechanism comprises a well washing valve upper part (4), a well washing pin (3), a convex packing (5) and a well washing valve lower part (6);
the upper well flushing valve (4) is connected with the upper connector (1) through a well flushing pin (3), and the upper well flushing valve (4) is in threaded connection with the lower well flushing valve (6); the outer part of the outer pipe (7) is sequentially sleeved with a rubber cylinder (8), a spacer ring (9), an upper retaining ring (11) and a retaining valve (13) from top to bottom, the upper retaining ring (11) is connected with the outer pipe (7) through a setting pin (12), and the retaining valve (13) is limited through the outer end face of the outer pipe (7);
the locking mechanism comprises a lock sleeve (17), a lock seat (15) and a lock ring (16) arranged on the lock seat (15);
the lock seat (15) is connected with the inner tube (10) through the deblocking pin (14), install between lock sleeve (17) and inner tube (10) and sit and seal piston (18) and sealing ring (19), the upper portion cover of lower clutch (21) is equipped with sealing ring (19), the lower part threaded connection of lower clutch (21) has lower link ring.
2. The water injection packer of claim 1, wherein: the flushing valve is characterized in that the flushing valve is provided with an upper connector (1) which is connected with the upper connector through a flushing pin (3), the flushing valve is provided with an upper connector (4) which is connected with a lower connector (6) through threads, the flushing valve is provided with a convex packing (5) inside the upper connector (4), the flushing valve is provided with an inner step inside the lower connector (6), and the flushing valve is provided with an outer boss capable of limiting the downward distance of the flushing mechanism on the upper portion of the inner pipe (10) and the lower connector (6).
3. The water injection packer of claim 1 or 2, wherein: a small-pitch sawtooth buckle is arranged between the outside of the locking ring (16) and the inside of the lock sleeve (17), a large-pitch sawtooth buckle is arranged between the inside of the locking ring (16) and the outside of the lock seat (15), the upper part of the lock seat (15) is connected with the inner pipe (10) through an unsealing pin (14), and a liquid discharge hole is formed in the middle of the lock sleeve (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110484510.0A CN113153205B (en) | 2021-04-30 | 2021-04-30 | Water injection packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110484510.0A CN113153205B (en) | 2021-04-30 | 2021-04-30 | Water injection packer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113153205A CN113153205A (en) | 2021-07-23 |
| CN113153205B true CN113153205B (en) | 2023-01-24 |
Family
ID=76873037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110484510.0A Active CN113153205B (en) | 2021-04-30 | 2021-04-30 | Water injection packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113153205B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116255109A (en) * | 2021-12-02 | 2023-06-13 | 大庆油田有限责任公司 | Cable packer for one-way rubber well washing mechanism of cable control water injection well |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4185690A (en) * | 1978-06-12 | 1980-01-29 | Baker International Corporation | Backsurge well cleaning tool |
| US5413180A (en) * | 1991-08-12 | 1995-05-09 | Halliburton Company | One trip backwash/sand control system with extendable washpipe isolation |
| CN2386188Y (en) * | 1999-04-02 | 2000-07-05 | 李树菊 | Layered mining washable well packer |
| CN2663649Y (en) * | 2003-10-27 | 2004-12-15 | 中国石油化工股份有限公司中原油田分公司采油工程技术研究院 | High pressure deep well water filling packer |
| CN202047784U (en) * | 2011-04-25 | 2011-11-23 | 王丽莉 | Packer |
| CN203702074U (en) * | 2013-11-25 | 2014-07-09 | 天津大港油田钻采技术开发公司 | Well flushable long rubber sleeve pressure differential water injection packer |
| CN204252931U (en) * | 2014-10-29 | 2015-04-08 | 中国石油天然气股份有限公司 | Water injection packer |
| CN210343294U (en) * | 2019-06-12 | 2020-04-17 | 中国石油化工股份有限公司 | Washable well water injection packer |
-
2021
- 2021-04-30 CN CN202110484510.0A patent/CN113153205B/en active Active
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| Publication number | Publication date |
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| CN113153205A (en) | 2021-07-23 |
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Effective date of registration: 20230630 Address after: 100728 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Patentee after: CHINA PETROLEUM & CHEMICAL Corp. Patentee after: China Petroleum Chemical Co Henan Oilfield Co. Address before: 4750 Shuangnan District, Bujiang town oil production plant, Tongbai County, Nanyang City, Henan Province Patentee before: Mao Fenghe |