CN107829706B - Recoverable packer - Google Patents
Recoverable packer Download PDFInfo
- Publication number
- CN107829706B CN107829706B CN201710917657.8A CN201710917657A CN107829706B CN 107829706 B CN107829706 B CN 107829706B CN 201710917657 A CN201710917657 A CN 201710917657A CN 107829706 B CN107829706 B CN 107829706B
- Authority
- CN
- China
- Prior art keywords
- sleeved
- ring
- wall
- piston
- outer tube
- 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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Links
- 230000008878 coupling Effects 0.000 claims abstract description 8
- 238000010168 coupling process Methods 0.000 claims abstract description 8
- 238000005859 coupling reaction Methods 0.000 claims abstract description 8
- 125000006850 spacer group Chemical group 0.000 claims description 3
- 238000004873 anchoring Methods 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- E21B33/128—Packers; Plugs with a member expanded radially by axial pressure
- E21B33/1285—Packers; Plugs with a member expanded radially by axial pressure by fluid pressure
-
- 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
- E21B33/129—Packers; Plugs with mechanical slips for hooking into the casing
- E21B33/1295—Packers; Plugs with mechanical slips for hooking into the casing actuated by fluid pressure
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)
- Joints With Sleeves (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
The invention discloses a recoverable packer, which comprises: the upper end of the central tube is sleeved with a coupling; the baffle ring is sleeved on the central tube; the split ring is sleeved on the central tube; an upper gauge ring is arranged on the upper gauge ring, the upper gauge ring is sleeved on the central pipe; the outer tube is sleeved on the central tube; a lower gauge ring sleeved on the outer pipe; the upper end rubber cylinder and the lower end rubber cylinder are sleeved on the outer tube; the two spacing rings are sleeved on the outer tube; the middle rubber cylinder is sleeved on the outer pipe; an upper shoulder pad and a lower shoulder pad; a limit piston; the piston is sleeved in the middle of the outer tube; a lock sleeve is sleeved at the lower end of the piston; a hydraulic cylinder; the upper cone is sleeved on the outer tube; the slips are sleeved on the outer pipe; a lower cone; a variable buckle joint. The recoverable packer has high bearing pressure and strong anchoring force.
Description
Technical Field
The invention relates to the technical field of packers, in particular to a recyclable packer.
Background
A packer is a downhole tool having an elastomeric sealing element and thereby sealing the annulus between various sized strings and the wellbore and between the strings and isolating the production zone for controlling production (injection) fluids and protecting the casing. The pressure-bearing capacity of the conventional recyclable packer is limited, and when a large pressure is met, the failure modes of the packer are as follows: the packing element damages, and shear pin cuts deblocking, or slips anchor not firmly and cause the packer to become invalid, influences production.
Disclosure of Invention
In view of the above-mentioned problems, it is an object of the present invention to provide a retrievable packer.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a retrievable packer, further comprising: the upper end of the central tube is sleeved with a coupling, and the lower end of the inner wall of the coupling is in threaded connection with the outer wall of the upper end of the central tube; the baffle ring is sleeved on the upper side of the central tube, the upper end of the baffle ring is fixedly connected with the central tube through a set screw, a split ring limiting groove is formed between the baffle ring and the outer wall of the central tube, a first annular bulge is formed by downward extension of the outer edge of the lower end face of the baffle ring, and an upper gauge ring limiting groove is formed between the first annular bulge and the outer wall of the central tube; the split ring is sleeved on the upper side of the central tube and is positioned in the split ring limiting groove; the upper gauge ring is sleeved on the upper side of the central tube, the upper end of the upper gauge ring is arranged in the upper gauge ring limiting groove, the upper gauge ring is fixedly connected with the baffle ring through a plurality of shear pins, and an outer tube limiting groove is formed between the lower side of the upper gauge ring and the outer wall of the central tube; the outer tube is sleeved in the middle of the central tube, the upper end of the outer tube is propped against the inner of the outer tube limiting groove, and the outer tube is connected with the central tube through a locking block; the lower gauge ring is sleeved on the upper side of the outer tube, and is positioned below the upper gauge ring; the upper end rubber cylinder and the lower end rubber cylinder are sleeved on the upper side of the outer tube in a manner of being opposite to each other, the upper end rubber cylinder and the lower end rubber cylinder are both positioned between the upper gauge ring and the lower gauge ring, and the upper end rubber cylinder is positioned above the lower end rubber cylinder; the two spacer rings are sleeved on the upper side of the outer tube in a manner of opposite to each other, and are positioned between the upper end rubber cylinder and the lower end rubber cylinder; the middle rubber cylinder is sleeved on the upper side of the outer tube, the middle rubber cylinder is positioned between the two spacing rings, a first annular groove is formed in the middle of the inner wall of the middle rubber cylinder, a rubber cylinder inner ring is sleeved on the outer tube, and the rubber cylinder inner ring is arranged in the first annular groove; the upper shoulder pad comprises a first side wall and a second side wall, the lower shoulder pad comprises a third side wall and a fourth side wall, the first side wall is sleeved on the upper gauge ring, the second side wall is sleeved on the upper end rubber barrel, the third side wall is sleeved on the lower end rubber barrel, and the fourth side wall is sleeved on the lower gauge ring; the limiting piston is sleeved on the upper side of the outer tube, the upper end of the limiting piston is propped against the lower end of the lower gauge ring, a fixed ring limiting groove is formed between the limiting piston and the outer wall of the outer tube, and a fixed ring is arranged in the fixed ring limiting groove; the piston is sleeved in the middle of the outer tube, and an opening check ring is arranged at the upper end of the piston and the lower end of the limiting piston; the outer wall of the middle part of the lock sleeve extends outwards to form an annular step, and an upper cone limit groove is formed between the step and the outer wall of the piston; the hydraulic cylinder is sleeved on the outer side of the piston, the upper end of the hydraulic cylinder is propped against the lower end of the lower shoulder pad, the lower end of the hydraulic cylinder is propped against the upper end of the step, and the hydraulic cylinder is fixedly connected with the upper gauge ring; the upper cone is sleeved on the lower side of the outer tube, the outer edge of the upper end face of the upper cone extends upwards to form a second annular bulge, the second annular bulge is arranged in the upper cone limit groove, a plurality of slip grooves are formed in the lower end face of the upper cone, and the bottom face of each slip groove is an inclined plane; the outer wall of the outer pipe is uniformly provided with a plurality of slips, the inner wall of the upper end of each slip is an inclined plane, the inclined plane of the upper end of each slip is matched with the inclined plane of the slip groove, the upper end of each slip is inserted into one slip groove, and the lower end of the upper cone is inserted between the upper ends of the slips and the outer pipe; the lower cone is sleeved on the lower side of the central pipe, the lower cone is of an annular structure with a longitudinal section in a shape of a Chinese character 'zhi', the upper ends of the lower cones are connected with the lower ends of the slips, a second annular groove is formed in the outer wall of the lower side of the central pipe, and the lower ends of the lower cones are propped in the second annular groove; the variable buckle joint is sleeved on the central tube, and the upper end of the inner wall of the variable buckle joint is in threaded connection with the lower end of the outer wall of the central tube.
The recyclable packer is characterized in that six check rings and three O-shaped rings are arranged between the outer pipe and the central pipe.
The recyclable packer is characterized in that the limiting piston is connected with the hydraulic cylinder through a plurality of shear pins.
The recyclable packer is characterized in that a check ring and two O-shaped rings are arranged between the limiting piston and the hydraulic cylinder, and a check ring and an O-shaped ring are arranged between the limiting piston and the outer tube.
The recoverable packer is characterized in that an O-shaped ring is arranged between the piston and the outer tube, and an O-shaped ring is arranged between the piston and the hydraulic cylinder.
The recoverable packer comprises a plurality of teeth arranged on the outer wall of each slip.
The recoverable packer comprises a plurality of connecting parts, wherein each connecting part is arranged at the lower end of each slip, a plurality of limiting grooves are formed in the upper end of each upper cone, and each connecting part is fixed in one limiting groove.
The recoverable packer, wherein the lock sleeve is connected with the lock ring through a set screw.
The recoverable packer is characterized in that the second annular protrusion is connected with the lock sleeve through a plurality of shear pins.
By adopting the technology, the invention has the positive effects compared with the prior art that:
(1) The recoverable packer has high bearing pressure and strong anchoring force.
(2) In the process of descending the packer, the invention can not cause the premature failure of the deblocking shear pin due to the inertia force applied to the shear pin caused by the operations of sliding drill, drilling, and the like.
Drawings
FIG. 1 is a partial cross-sectional view of a retrievable packer of the invention.
FIG. 2 is an enlarged view of the recoverable packer of the present invention at A in FIG. 1.
FIG. 3 is an enlarged view of the recoverable packer of the present invention at B in FIG. 1.
In the accompanying drawings: 1. a central tube; 2. coupling; 3. a baffle ring; 4. a first annular projection; 5. an annulus; 6. a gauge ring is arranged; 7. an outer tube; 8. a lower gauge ring; 9. an upper end rubber cylinder; 10. a lower end rubber cylinder; 11. a middle rubber cylinder; 12. an inner ring of the rubber cylinder; 13. a spacer ring; 14. an upper shoulder pad; 141. a first sidewall; 141. a second sidewall; 15. a lower shoulder pad; 151. a third sidewall; 152. a fourth sidewall; 16. a limit piston; 17. a fixing ring; 18. a piston; 19. a split retainer ring; 20. a lock sleeve; 201. a step; 21. a locking ring; 22. a hydraulic cylinder; 23. an upper cone; 231. a second annular projection; 24. a slip; 241. teeth; 25. a lower cone; 26. a second annular groove; 27. a variant buckle joint; 28. a connection part; 29. a locking piece.
Detailed Description
The invention is further described below with reference to the drawings and specific examples, which are not intended to be limiting.
FIG. 1 is a partial cross-sectional view of a retrievable packer of the present invention, FIG. 2 is an enlarged view of the retrievable packer of the present invention at A in FIG. 1, and FIG. 3 is an enlarged view of the retrievable packer of the present invention at B in FIG. 1. Referring to fig. 1, 2 and 3, there is shown a recoverable packer of a preferred embodiment, comprising: and the upper end of the central tube 1 is sleeved with a coupling 2, and the lower end of the inner wall of the coupling 2 is in threaded connection with the outer wall of the upper end of the central tube 1.
Further, as a preferred embodiment, the retrievable packer further comprises: the baffle ring 3 is sleeved on the upper side of the central tube 1, the upper end of the baffle ring 3 is fixedly connected with the central tube 1 through a set screw, a split ring limiting groove is formed between the baffle ring 3 and the outer wall of the central tube 1, the outer edge of the lower end face of the baffle ring 3 extends downwards to form a first annular bulge 4, and an upper gauge ring limiting groove is formed between the first annular bulge 4 and the outer wall of the central tube 1.
Still further, as a preferred embodiment, the retrievable packer further comprises: the split ring 5 is sleeved on the upper side of the central tube 1, and the split ring 5 is positioned in the split ring limiting groove.
Still further, as a preferred embodiment, the retrievable packer further comprises: the upper gauge ring 6 is sleeved on the upper side of the central tube 1, the upper end of the upper gauge ring 6 is arranged in an upper gauge ring limiting groove, the upper gauge ring 6 is fixedly connected with the baffle ring 3 through a plurality of shear pins, and an outer tube limiting groove is formed between the lower side of the upper gauge ring 6 and the outer wall of the central tube 1.
Additionally, as a preferred embodiment, the retrievable packer further comprises: the outer tube 7 is sleeved in the middle of the central tube 1, the upper end of the outer tube 7 is propped against the inner side of the outer tube limiting groove, and the outer tube 7 is connected with the central tube 1 through a locking block 29.
Moreover, as a preferred embodiment, the retrievable packer further comprises: and a lower gauge ring 8, wherein the lower gauge ring 8 is sleeved on the upper side of the outer tube 7, and the lower gauge ring 8 is positioned below the upper gauge ring 6.
Furthermore, as a preferred embodiment, the retrievable packer further comprises: an upper end rubber cylinder 9 and a lower end rubber cylinder 10, wherein the upper end rubber cylinder 9 and the lower end rubber cylinder 10 are sleeved on the upper side of the outer tube 7 in a mutually opposite mode, the upper end rubber cylinder 9 and the lower end rubber cylinder 10 are both positioned between the upper gauge ring 6 and the lower gauge ring 8, and the upper end rubber cylinder 9 is positioned above the lower end rubber cylinder 10.
Additionally, as a preferred embodiment, the retrievable packer further comprises: the two spacing rings 13 are sleeved on the upper side of the outer tube 7 in a manner of opposite to each other, and the two spacing rings 13 are positioned between the upper end rubber cylinder 9 and the lower end rubber cylinder 10.
Furthermore, as a preferred embodiment, wherein the recoverable packer further comprises: the middle rubber cylinder 11 is sleeved on the upper side of the outer tube 7, the middle rubber cylinder 11 is positioned between the two spacing rings 13, a first annular groove is formed in the middle of the inner wall of the middle rubber cylinder 11, a rubber cylinder inner ring 12 is sleeved on the outer tube 7, and the rubber cylinder inner ring 12 is arranged in the first annular groove.
Additionally, as a preferred embodiment, wherein the retrievable packer further comprises: an upper shoulder pad 14 and a lower shoulder pad 15, the upper shoulder pad 14 and the lower shoulder pad 15 are rubber cylinder protecting devices, the upper shoulder pad 14 comprises a first side wall 141 and a second side wall 142, the lower shoulder pad 15 comprises a third side wall 151 and a fourth side wall 152, the first side wall 141 is sleeved on the upper gauge ring 6, the second side wall 142 is sleeved on the upper end rubber cylinder 9, the third side wall 151 is sleeved on the lower end rubber cylinder 10, and the fourth side wall 152 is sleeved on the lower gauge ring 8.
Also, as a preferred embodiment, wherein the retrievable packer further comprises: the limiting piston 16 is sleeved on the upper side of the outer tube 7, the upper end of the limiting piston 16 abuts against the lower end of the lower gauge ring 8, a fixed ring limiting groove is formed between the limiting piston 16 and the outer wall of the outer tube 7, and a fixed ring 17 is arranged in the fixed ring limiting groove.
Also, as a preferred embodiment, wherein the retrievable packer further comprises: the piston 18 is sleeved in the middle of the outer tube 7, and a split washer 19 is arranged at the upper end of the piston 18 and the lower end of the limiting piston 16.
Further, as a preferred embodiment, wherein the recoverable packer further comprises: a lock sleeve 20 is sleeved on the outer wall of the lower end of the piston 18, the lock sleeve 20 is connected with the piston 18 through a lock ring 21, the outer wall of the middle part of the lock sleeve 20 extends outwards to form an annular step 201, and an upper cone limit groove is formed between the step 201 and the outer wall of the piston 18.
Still further, as a preferred embodiment, wherein the retrievable packer further comprises: the hydraulic cylinder 22 is sleeved on the outer side of the piston 18, the upper end of the hydraulic cylinder 22 abuts against the lower end of the lower shoulder pad 15, the lower end of the hydraulic cylinder 22 abuts against the upper end of the step 201, and the hydraulic cylinder 22 is fixedly connected with the upper gauge ring 6.
Still further, as a preferred embodiment, wherein the retrievable packer further comprises: an upper cone 23, the upper cone 23 is sleeved on the lower side of the outer tube 7, the outer edge of the upper end surface of the upper cone 23 extends upwards to form a second annular bulge 231, the second annular protrusion 231 is disposed in the upper cone limiting groove, and a plurality of slip grooves (not shown in the figure) are formed in the lower end face of the upper cone 23, and the bottom faces of the slip grooves are inclined planes.
Also, as a preferred embodiment, wherein the retrievable packer further comprises: the slips 24, the even outer wall a week of setting in the downside of outer tube 7 of a plurality of slips 24, the inner wall of the upper end of each slip 24 is the inclined plane, and the inclined plane of the upper end of each slip 24 matches with the inclined plane of slip groove, and in the upper end of each slip all inserted a slip groove, the lower extreme of upper cone 23 inserted between the upper end of a plurality of slips 24 and outer tube 7.
Also, as a preferred embodiment, wherein the retrievable packer further comprises: the lower cone 25 is sleeved on the lower side of the central tube 1, the lower cone 25 is of an annular structure with a longitudinal section in a shape like a Chinese character 'zhi', the upper ends of the lower cones 25 are connected with the lower ends of the slips 24, a second annular groove 26 is formed in the outer wall of the lower side of the central tube 1, the lower ends of the lower cones 25 are propped against the second annular groove 26, and when the lower cones 25 move upwards to extrude the slips 24, the slips 24 are outwards opened simultaneously through the matching of inclined planes.
Furthermore, as a preferred embodiment, wherein the recoverable packer further comprises: and the variable buckle joint 27 is sleeved on the central tube 1, and the upper end of the inner wall of the variable buckle joint 27 is in threaded connection with the lower end of the outer wall of the central tube 1.
The foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the embodiments and the protection scope of the present invention.
The present invention has the following embodiments based on the above description:
in a further embodiment of the invention, six check rings and three O-rings are arranged between the outer tube 7 and the central tube 1.
In a further embodiment of the invention, the stop piston 16 is connected to the hydraulic cylinder 22 by a plurality of shear pins.
In a further embodiment of the invention, a check ring and two O-rings are arranged between the limiting piston 16 and the hydraulic cylinder 22, and a check ring and an O-ring are arranged between the limiting piston 16 and the outer tube 7.
In a further embodiment of the invention, an O-ring is arranged between the piston 18 and the outer tube 7, and an O-ring is arranged between the piston 18 and the cylinder 22.
In a further embodiment of the present invention, a plurality of teeth 241 are provided on the outer wall of each slip 24.
In a further embodiment of the present invention, the lower end of each slip 24 has a connecting portion 28, the upper end of the upper cone 23 is provided with a plurality of limiting grooves, and each connecting portion 28 is fixed in a limiting groove.
In a further embodiment of the invention, the sleeve 20 is connected to the locking ring 21 by a set screw.
In a further embodiment of the invention, wherein the second annular projection 231 is connected to the sleeve 20 by a plurality of shear pins.
The foregoing is merely illustrative of the preferred embodiments of the present invention and is not intended to limit the embodiments and scope of the present invention, and it should be appreciated by those skilled in the art that equivalent substitutions and obvious variations may be made using the description and illustrations of the present invention, and are intended to be included in the scope of the present invention.
Claims (9)
1. A retrievable packer, comprising:
the upper end of the central tube is sleeved with a coupling, and the lower end of the inner wall of the coupling is in threaded connection with the outer wall of the upper end of the central tube;
the baffle ring is sleeved on the upper side of the central tube, the upper end of the baffle ring is fixedly connected with the central tube through a set screw, a split ring limiting groove is formed between the baffle ring and the outer wall of the central tube, a first annular bulge is formed by downward extension of the outer edge of the lower end face of the baffle ring, and an upper gauge ring limiting groove is formed between the first annular bulge and the outer wall of the central tube;
the split ring is sleeved on the upper side of the central tube and is positioned in the split ring limiting groove;
the upper gauge ring is sleeved on the upper side of the central tube, the upper end of the upper gauge ring is arranged in the upper gauge ring limiting groove, the upper gauge ring is fixedly connected with the baffle ring through a plurality of shear pins, and an outer tube limiting groove is formed between the lower side of the upper gauge ring and the outer wall of the central tube;
the outer tube is sleeved in the middle of the central tube, the upper end of the outer tube is propped against the inner of the outer tube limiting groove, and the outer tube is connected with the central tube through a locking block;
the lower gauge ring is sleeved on the upper side of the outer tube, and is positioned below the upper gauge ring;
the upper end rubber cylinder and the lower end rubber cylinder are sleeved on the upper side of the outer tube in a manner of being opposite to each other, the upper end rubber cylinder and the lower end rubber cylinder are both positioned between the upper gauge ring and the lower gauge ring, and the upper end rubber cylinder is positioned above the lower end rubber cylinder;
the two spacer rings are sleeved on the upper side of the outer tube in a manner of opposite to each other, and are positioned between the upper end rubber cylinder and the lower end rubber cylinder;
the middle rubber cylinder is sleeved on the upper side of the outer tube, the middle rubber cylinder is positioned between the two spacing rings, a first annular groove is formed in the middle of the inner wall of the middle rubber cylinder, a rubber cylinder inner ring is sleeved on the outer tube, and the rubber cylinder inner ring is arranged in the first annular groove;
the upper shoulder pad comprises a first side wall and a second side wall, the lower shoulder pad comprises a third side wall and a fourth side wall, the first side wall is sleeved on the upper gauge ring, the second side wall is sleeved on the upper end rubber barrel, the third side wall is sleeved on the lower end rubber barrel, and the fourth side wall is sleeved on the lower gauge ring;
the limiting piston is sleeved on the upper side of the outer tube, the upper end of the limiting piston is propped against the lower end of the lower gauge ring, a fixed ring limiting groove is formed between the limiting piston and the outer wall of the outer tube, and a fixed ring is arranged in the fixed ring limiting groove;
the piston is sleeved in the middle of the outer tube, and an opening check ring is arranged at the upper end of the piston and the lower end of the limiting piston;
the outer wall of the middle part of the lock sleeve extends outwards to form an annular step, and an upper cone limit groove is formed between the step and the outer wall of the piston;
the hydraulic cylinder is sleeved on the outer side of the piston, the upper end of the hydraulic cylinder is propped against the lower end of the lower shoulder pad, the lower end of the hydraulic cylinder is propped against the upper end of the step, and the hydraulic cylinder is fixedly connected with the upper gauge ring;
an upper cone sleeved on the lower side of the outer tube, the outer edge of the upper end surface of the upper cone extends upwards to form a second annular bulge, the second annular bulge is arranged in the upper cone limiting groove, a plurality of slip grooves are formed in the lower end face of the upper cone, and the bottom faces of the slip grooves are inclined planes;
the outer wall of the outer pipe is uniformly provided with a plurality of slips, the inner wall of the upper end of each slip is an inclined plane, the inclined plane of the upper end of each slip is matched with the inclined plane of the slip groove, the upper end of each slip is inserted into one slip groove, and the lower end of the upper cone is inserted between the upper ends of the slips and the outer pipe;
the lower cone is sleeved on the lower side of the central tube, the lower cone is of an annular structure with a longitudinal section in a shape of a Chinese character 'zhi', the upper ends of the lower cones are connected with the lower ends of a plurality of slips, a second annular groove is formed in the outer wall of the lower side of the central tube, and the lower end of the lower cone is propped in the second annular groove;
the variable buckle joint is sleeved on the central tube, and the upper end of the inner wall of the variable buckle joint is in threaded connection with the lower end of the outer wall of the central tube.
2. The retrievable packer of claim 1, wherein six collars and three O-rings are provided between the outer tube and the base pipe.
3. The retrievable packer of claim 1, wherein the check piston is connected to the hydraulic cylinder by a plurality of shear pins.
4. The retrievable packer of claim 1, wherein a retainer ring and two O-rings are disposed between the check piston and the hydraulic cylinder, and a retainer ring and an O-ring are disposed between the check piston and the outer tube.
5. The retrievable packer of claim 1, wherein an O-ring is disposed between the piston and the outer tube, and an O-ring is disposed between the piston and the hydraulic cylinder.
6. The retrievable packer of claim 1, wherein the outer wall of each slip defines a plurality of teeth.
7. The retrievable packer of claim 1, wherein a lower end of each slip has a connecting portion, the upper end of the upper cone defines a plurality of limit slots, each connecting portion being secured within one of the limit slots.
8. The retrievable packer of claim 1, wherein the lock sleeve and the lock ring are connected by a set screw.
9. The retrievable packer of claim 1, wherein the second annular projection and the lock sleeve are connected by a plurality of shear pins.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710917657.8A CN107829706B (en) | 2017-09-30 | 2017-09-30 | Recoverable packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710917657.8A CN107829706B (en) | 2017-09-30 | 2017-09-30 | Recoverable packer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107829706A CN107829706A (en) | 2018-03-23 |
| CN107829706B true CN107829706B (en) | 2024-04-05 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710917657.8A Active CN107829706B (en) | 2017-09-30 | 2017-09-30 | Recoverable packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107829706B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109798086A (en) * | 2019-03-01 | 2019-05-24 | 中石化石油工程技术服务有限公司 | High temperature and pressure oil/gas well Open-Hole Section insulates completion system |
| CN110735611B (en) * | 2019-11-12 | 2024-07-02 | 四机赛瓦石油钻采设备有限公司 | Sealing assembly of airtight packer |
| CN114320216B (en) * | 2022-02-16 | 2023-09-15 | 成都德维石油技术服务有限责任公司 | Packer |
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| US5701954A (en) * | 1996-03-06 | 1997-12-30 | Halliburton Energy Services, Inc. | High temperature, high pressure retrievable packer |
| CN201420529Y (en) * | 2009-01-05 | 2010-03-10 | 顾明祥 | Removable bridge plug |
| CN205225166U (en) * | 2015-12-10 | 2016-05-11 | 中国海洋石油总公司 | Self compensating formula high temperature thermal insulation packer |
| CN207673313U (en) * | 2017-09-30 | 2018-07-31 | 上海优强石油科技有限公司 | A kind of recyclable packer of high-performance |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8336615B2 (en) * | 2006-06-02 | 2012-12-25 | Bj Tool Services Ltd. | Low pressure-set packer |
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2017
- 2017-09-30 CN CN201710917657.8A patent/CN107829706B/en active Active
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|---|---|---|---|---|
| US5701954A (en) * | 1996-03-06 | 1997-12-30 | Halliburton Energy Services, Inc. | High temperature, high pressure retrievable packer |
| CN201420529Y (en) * | 2009-01-05 | 2010-03-10 | 顾明祥 | Removable bridge plug |
| CN205225166U (en) * | 2015-12-10 | 2016-05-11 | 中国海洋石油总公司 | Self compensating formula high temperature thermal insulation packer |
| CN207673313U (en) * | 2017-09-30 | 2018-07-31 | 上海优强石油科技有限公司 | A kind of recyclable packer of high-performance |
Non-Patent Citations (1)
| Title |
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| 高压单管封隔器的设计;钟功祥;阳玲;;机电产品开发与创新(第01期);62-63 * |
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