CN108060901B - Release mechanism for open hole patching tool of equal-well-diameter expansion casing - Google Patents
Release mechanism for open hole patching tool of equal-well-diameter expansion casing Download PDFInfo
- Publication number
- CN108060901B CN108060901B CN201711169875.4A CN201711169875A CN108060901B CN 108060901 B CN108060901 B CN 108060901B CN 201711169875 A CN201711169875 A CN 201711169875A CN 108060901 B CN108060901 B CN 108060901B
- Authority
- CN
- China
- Prior art keywords
- releasing
- piston
- pawl spring
- open hole
- tool
- 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
- 238000007789 sealing Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 210000000078 claw Anatomy 0.000 description 10
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/06—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for setting packers
-
- 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
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)
- Earth Drilling (AREA)
Abstract
The invention relates to the technical field of expansion pipe open hole patching and leakage stoppage, in particular to a releasing mechanism for an open hole patching tool of an expansion casing with a constant borehole diameter. The device's outer tube lower extreme is connected the pawl spring of giving up, sends into the tubular column lower extreme and passes through the joint connection release body, and release body inner wall connects the piston through the scissor pin of giving up, is provided with a plurality of locking pieces on the release body lateral wall circumference, and the piston just corresponds the locking piece to the outer locking piece recess of piston when going down to the spacing step in the release body outside, and the pawl spring inner wall inclined plane of giving up can promote the locking piece to the locking piston in the outer locking piece recess when giving up the pawl spring. The invention realizes the releasing function and can also realize the normal closing of the reducing expansion cone, all tool accessories can be completely lifted out of a well mouth along with a feeding pipe column, no residual tool accessories are left in the well, the structural design is reasonable, the ball throwing and the back-off are not needed, the reliability is high, the operation is simple and convenient, the subsequent production measures are convenient, the production cost is reduced, the releasing success rate of the underground tool is improved, and the operation risk is reduced.
Description
The technical field is as follows:
The invention relates to the technical field of expansion pipe open hole patching and leakage stoppage, in particular to a releasing mechanism for an open hole patching tool of an expansion casing with a constant borehole diameter.
Background art:
The normal production of an oil zone is seriously influenced by the complex working conditions such as collapse, leakage and the like encountered in the drilling process of a multi-pressure system complex stratum, and the most effective treatment method in the current engineering is to adopt an equal-borehole-diameter expansion pipe technology to patch and reinforce the open hole stratum without changing the original well depth structure. The releasing mechanism is a core component of the whole expansion pipe open hole patching tool and is related to whether the subsequent hydraulic reducing expansion cone can be closed smoothly or not and whether the expansion sleeve can be expanded and suspended smoothly or not. The technical requirement of open hole patching of the equal-well-diameter expansion casing is that the releasing mechanism can realize the releasing function and cannot influence the normal closing of the reducing expansion cone. The prior releasing tool technology in China at present adopts a ball throwing type or a reverse buckling type, has single function, and cannot meet the technical requirement and the construction requirement of a constant-bore expansion pipe open hole patching plugging tool.
The invention content is as follows:
The invention aims to solve the technical problem of providing a releasing mechanism for a barefoot patching tool of an expansion casing with a constant borehole diameter, the device realizes normal closing of a reducing expansion cone while realizing a releasing function, all tool accessories can be completely lifted out of a well mouth along with a feeding pipe column, no residual tool accessories exist in the well, the structural design is reasonable, ball throwing and back-off are not needed, the reliability is high, the operation is simple and convenient, subsequent production measures are convenient, the production cost is reduced, the releasing success rate of downhole tools is improved, and the operation risk is reduced. The defect that the normal closing of the variable-diameter expansion cone is influenced while the releasing function is realized due to the single function of the conventional releasing tool is overcome.
the technical scheme adopted by the invention is as follows: a releasing mechanism for an open hole patching tool of an expandable casing with a constant borehole diameter comprises an outer pipe and a feeding pipe column; the lower end of the outer pipe is connected with a releasing claw spring, the lower end of the feeding pipe column is connected with a releasing body through a joint, the inner wall of the releasing body is connected with a piston through a releasing shear pin, a plurality of locking blocks are arranged on the side wall of the releasing body in the circumferential direction, the outer locking block groove of the piston just corresponds to the locking block when the piston moves downwards to the limit step on the inner side of the releasing body, the inner wall inclined plane of the releasing claw spring can push the locking block to lock the piston in the outer locking block groove when the releasing claw spring moves upwards, a bottom plug is sleeved on the outer side of the lower part of the piston, the bottom plug props up the releasing claw spring to limit the releasing claw spring in the inner wall groove of the expansion sleeve, the outer wall of.
And a sealing ring is arranged in the outer sealing groove at the upper end of the piston.
The inner wall inclined plane of the releasing pawl spring is designed into a 45-degree inclined plane, and the locking block is arranged at the upper end of the 45-degree inclined plane of the releasing pawl spring.
the invention has the beneficial effects that: the invention realizes the releasing function and can also realize the normal closing of the reducing expansion cone, all tool accessories can be completely lifted out of a well mouth along with a feeding pipe column, no residual tool accessories are left in the well, the structural design is reasonable, the ball throwing and the back-off are not needed, the reliability is high, the operation is simple and convenient, the subsequent production measures are convenient, the production cost is reduced, the releasing success rate of the underground tool is improved, and the operation risk is reduced.
Description of the drawings:
the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic diagram of the invention after releasing.
The specific implementation mode is as follows:
as shown in fig. 1 and 2, the releasing mechanism for the open hole patching tool of the equal-well-diameter expansion casing comprises an outer pipe 2 and a sending pipe column 3; the lower end of the outer pipe 2 is connected with a releasing claw spring 11, the lower end of the feeding pipe column 3 is connected with a releasing body 8 through a joint 4, the inner wall of the releasing body 8 is connected with a piston 6 through a releasing shear pin 10, a plurality of locking blocks 9 are circumferentially arranged on the side wall of the releasing body 8, an outer locking block groove 7 of the piston 6 is right opposite to a corresponding locking block 9 when the piston 6 moves downwards to an inner side limit step of the releasing body 8, the locking block 9 can be pushed to lock the piston 6 in the outer locking block groove 7 by an inner wall inclined plane of the releasing claw spring 11 when the releasing claw spring 11 moves upwards, a bottom plug 12 is sleeved on the outer side of the lower portion of the piston 6, the bottom plug 12 props the releasing claw spring 11 to enable the releasing claw spring 11 to be limited in the inner wall groove of the expansion sleeve 1, a bottom plug limit step is.
A sealing ring 5 is arranged in the outer sealing groove at the upper end of the piston 6.
The inner wall inclined plane of the releasing pawl spring 11 is designed to be a 45-degree inclined plane, and the locking block 9 is arranged at the upper end of the 45-degree inclined plane of the releasing pawl spring 11.
When the device is used, the expansion casing 1 is conveyed to a specified complex stratum position by the conveying pipe column 3, clear water is pressurized, when the pressure reaches a set value, the releasing shear pin 10 is sheared, the piston 6 descends to the position of a limit step of the releasing body 8, the bottom plug 12 is pushed away from the releasing pawl spring 11, the releasing pawl spring 11 loses the effective support of the bottom plug 12, the outer pipe 2 ascends, the releasing pawl spring 11 contracts to realize the effective separation of the outer pipe 2 and the expansion casing 1, the inclined surface of the inner wall of the releasing pawl spring 11 extrudes the locking block 9 when the outer pipe 2 ascends, and the locking block 9 falls into the groove 7 of the outer locking block. The expansion cone sheet positioned on the upper part of the outer pipe 2 and the expansion cone sheet on the feeding pipe column 3 are closed when the outer pipe 2 moves upwards, and the reducing cone integrally moves upwards to expand the pipe under the action of hydraulic pressure. The piston 6 and the bottom plug 12 move upwards along with the feeding pipe column 3 to complete the expansion suspension of the equal-well-diameter expansion casing pipe, and finally the whole body is lifted out of the well.
It should be understood that the detailed description of the present invention is only for illustrating the present invention and is not limited by the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention can be modified or substituted equally to achieve the same technical effects; as long as the use requirements are met, the method is within the protection scope of the invention.
Claims (3)
1. A releasing mechanism for an open hole patching tool of an expandable casing with a constant borehole diameter comprises an outer pipe (2) and a feeding pipe column (3); the method is characterized in that: the lower end of the outer pipe (2) is connected with a releasing pawl spring (11), the lower end of the feeding pipe column (3) is connected with a releasing body (8) through a joint (4), the inner wall of the releasing body (8) is connected with a piston (6) through a releasing shear pin (10), a plurality of locking blocks (9) are arranged on the circumferential direction of the side wall of the releasing body (8), an outer locking block groove (7) of the piston (6) is just opposite to a corresponding locking block (9) when the piston (6) descends to a limiting step on the inner side of the releasing body (8), the inner wall inclined plane of the releasing pawl spring (11) can push the locking block (9) to lock the piston (6) in the outer locking block groove (7) when the releasing pawl spring (11) ascends, a bottom plug (12) is sleeved on the outer side of the lower part of the piston (6), the bottom plug (12) props the releasing pawl spring (11) to limit the releasing pawl spring (11) in the inner wall groove of the expansion sleeve (1), a bottom, the lower end of the bottom plug (12) is provided with a locking nut (13).
2. The release mechanism for an open hole patch tool for an expandable casing with a constant borehole diameter as defined in claim 1, wherein: and a sealing ring (5) is arranged in the outer sealing groove at the upper end of the piston (6).
3. The release mechanism for an open hole patch tool for an expandable casing with a constant borehole diameter as defined in claim 1, wherein: the inner wall inclined plane of the releasing pawl spring (11) is designed to be a 45-degree inclined plane, and the locking block (9) is arranged at the upper end of the 45-degree inclined plane of the releasing pawl spring (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711169875.4A CN108060901B (en) | 2017-11-22 | 2017-11-22 | Release mechanism for open hole patching tool of equal-well-diameter expansion casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711169875.4A CN108060901B (en) | 2017-11-22 | 2017-11-22 | Release mechanism for open hole patching tool of equal-well-diameter expansion casing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108060901A CN108060901A (en) | 2018-05-22 |
| CN108060901B true CN108060901B (en) | 2019-12-13 |
Family
ID=62135001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711169875.4A Active CN108060901B (en) | 2017-11-22 | 2017-11-22 | Release mechanism for open hole patching tool of equal-well-diameter expansion casing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108060901B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114482907B (en) * | 2022-01-25 | 2024-06-25 | 中海油田服务股份有限公司 | Oil well operation tool |
| CN114961620A (en) * | 2022-08-02 | 2022-08-30 | 中石化胜利石油工程有限公司钻井工艺研究院 | Releasing device for hydraulic expansion pipe |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202047772U (en) * | 2011-05-25 | 2011-11-23 | 中国石油天然气股份有限公司 | Expansion and fishing integrated expansion pipe assembly |
| CN202194605U (en) * | 2011-06-23 | 2012-04-18 | 中国石油化工股份有限公司 | Hand release device for casing patch reinforcement |
| WO2014207085A1 (en) * | 2013-06-27 | 2014-12-31 | Welltec A/S | Patch setting tool |
| CN104989306A (en) * | 2015-08-06 | 2015-10-21 | 中国石油集团长城钻探工程有限公司 | Releasable screen tube hanger |
| CN206000501U (en) * | 2016-08-16 | 2017-03-08 | 中国石油化工股份有限公司 | A kind of suspension type self-expanding blocks tubing string |
-
2017
- 2017-11-22 CN CN201711169875.4A patent/CN108060901B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202047772U (en) * | 2011-05-25 | 2011-11-23 | 中国石油天然气股份有限公司 | Expansion and fishing integrated expansion pipe assembly |
| CN202194605U (en) * | 2011-06-23 | 2012-04-18 | 中国石油化工股份有限公司 | Hand release device for casing patch reinforcement |
| WO2014207085A1 (en) * | 2013-06-27 | 2014-12-31 | Welltec A/S | Patch setting tool |
| CN104989306A (en) * | 2015-08-06 | 2015-10-21 | 中国石油集团长城钻探工程有限公司 | Releasable screen tube hanger |
| CN206000501U (en) * | 2016-08-16 | 2017-03-08 | 中国石油化工股份有限公司 | A kind of suspension type self-expanding blocks tubing string |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108060901A (en) | 2018-05-22 |
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| PB01 | Publication | ||
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| TR01 | Transfer of patent right | ||
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Effective date of registration: 20201023 Address after: No. 6, liupukang, Xicheng District, Beijing 100120 Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: China National Petroleum Corporation Great Wall Drilling Engineering Co.,Ltd. Address before: 124010 Xinglongtai, Liaoning Province, oil street, No. 96, No. Patentee before: China National Petroleum Corporation Great Wall Drilling Engineering Co.,Ltd. |