CN202900220U - Novel lock claw type sleeve thermal stress compensator - Google Patents
Novel lock claw type sleeve thermal stress compensator Download PDFInfo
- Publication number
- CN202900220U CN202900220U CN 201220432120 CN201220432120U CN202900220U CN 202900220 U CN202900220 U CN 202900220U CN 201220432120 CN201220432120 CN 201220432120 CN 201220432120 U CN201220432120 U CN 201220432120U CN 202900220 U CN202900220 U CN 202900220U
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- China
- Prior art keywords
- thermal stress
- lock
- lock claw
- piston
- lock pawl
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- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to a novel lock claw type sleeve thermal stress compensator. The novel lock claw type sleeve thermal stress compensator comprises an outer cylinder and an inner cylinder, wherein, a lock sleeve is fixedly connected with the inner cylinder, a piston capable of moving is arranged between the outer cylinder and the inner cylinder, an enclosed space is formed by the outer cylinder, the inner cylinder, the lock sleeve and the piston, and a thermo-sensitive medium is filled inside the enclosed space. A lock claw is fixed on the end portion of the lock sleeve in an intermittent mode; the piston is locked through the lock claw. The novel lock claw type sleeve thermal stress compensator has the advantages that the structure is simple and the ability of bearing the tension and the pressure is strong. Only when the thermal recovery and the thermal infusion reach a certain temperature can the mechanism operate and the device work. The possibility of the operation being out of work in advance for the device does not exist. The novel lock claw type sleeve thermal stress compensator is widely used in an oil exploitation system.
Description
Technical field
The utility model relates to a kind of drilling completion downhole tool, particularly a kind of novel lock pawl formula sleeve pipe thermal stress compensation device.
Background technology
Annotating in the activities in petroleum thermal recovery, heat, generally be used for eliminating or alleviating the sleeve pipe internal stress by sleeve pipe thermal stress compensation device, is a kind of downhole tool of avoiding casing failure.The thermal stress compensation device that generally uses at present has following two kinds of structures: a kind of is the ring key formula, and its complex structure is difficult for assembling; Another kind is the shear pin formula, connects by shear pin between inner/outer tube, when the sleeve pipe expanded by heating, cuts off shear pin, and inside and outside sleeve relatively moves, and eliminates the sleeve pipe internal stress; There are the following problems for this thermal stress compensation device: be hampered in the lower tubular column process, can shift to an earlier date the shear pin pin, cause the thermal stress compensation device to lose efficacy; In addition, bear the suspending weight ability.
Summary of the invention
The purpose of this utility model is exactly in view of the foregoing defects the prior art has, provides a kind of novel lock pawl formula sleeve pipe thermal stress compensation device, piston release when being heated, under the effect of sleeve pipe internal stress, the lock pawl shrinks, and inner core, urceolus relative motion realize the compensating jacket stroke.
Its technical scheme is: comprise urceolus and inner core, wherein, lock tube is fixedly connected with inner core, and transportable piston is located between urceolus and the inner core, and described urceolus, inner core, lock tube and piston form a confined space, are filled with thermal media in confined space; The end of described lock tube connects discontinuous lock pawl, by discontinuous lock pawl piston is pinned;
Above-mentioned discontinuous lock pawl is comprised of lock pawl body, lock pawl and connector, and an end of described lock pawl body is provided with connector, and the other end is fixed 8-12 lock pawls.
The thermal media expanded by heating of confined space of the present utility model, pushing piston moves, the lock tube release, urceolus and inner core can be movable relatively, and realize the sleeve pipe thermal stress compensation.
The utility model is compared with existing thermal stress compensation device and is had following advantage:
1, the ability of bearing tension and pressure is strong;
2, in thermal recovery, when heat is annotated uniform temperature, mechanism action, device works, the possibility of having avoided in advance action of device to lose efficacy.
3, simple in structure, easily assembling.
Description of drawings
Accompanying drawing 1 is structural representation of the present utility model;
Accompanying drawing 2 is lock tube structural representation of the present utility model;
Among the upper figure: urceolus 1, lock tube 2, piston 3, inner core 4, discontinuous lock pawl 5, confined space 6; Lock pawl body 5.1, lock pawl 5.2, connector 5.3.
The specific embodiment
1-2 by reference to the accompanying drawings, the utility model will be further described:
The utility model comprises urceolus 1 and inner core 4, wherein, lock tube 2 is fixedly connected with inner core 4, and transportable piston 3 is located between urceolus 1 and the inner core 4, described urceolus 1, inner core 4, lock tube 2 form a confined space 6 with piston 3, are filled with thermal media in confined space 6; The end of described lock tube 2 connects discontinuous lock pawl 5, by discontinuous lock pawl 5 piston 3 is pinned;
Wherein, discontinuous lock pawl 5 is comprised of lock pawl body 5.1, lock pawl 5.2 and connector 5.3, and an end of described lock pawl body 5.1 is provided with connector 5.3, and the other end is fixed 8-12 lock pawls 5, can at radial contraction, spreading, pin by the lock pawl of piston with lock tube.
In addition, an end diameter of piston 3 is thinner, cooperates with discontinuous lock pawl; The other end is thicker, contacts cooperation with barrel; Thermal media expanded by heating wherein, pushing piston moves, the lock tube release, urceolus and inner core can be movable relatively, and realize the sleeve pipe thermal stress compensation.
The utlity model has simple in structurely, the ability of bearing tension and pressure is strong, and in thermal recovery, when heat is annotated uniform temperature, mechanism just moves, and device works, and the possibility of having avoided in advance action of device to lose efficacy is widely used in the petroleum production system.
Claims (2)
1. novel lock pawl formula sleeve pipe thermal stress compensation device, it is characterized in that: comprise urceolus (1) and inner core (4), wherein, lock tube (2) is fixedly connected with inner core (4), transportable piston (3) is located between urceolus (1) and the inner core (4), described urceolus (1), inner core (4), lock tube (2) form a confined space (6) with piston (3), are filled with thermal media in confined space (6); The end of described lock tube (2) connects discontinuous lock pawl (5), by discontinuous lock pawl (5) piston (3) is pinned.
2. novel lock pawl formula sleeve pipe thermal stress compensation device according to claim 1, it is characterized in that: described discontinuous lock pawl (5) is comprised of lock pawl body (5.1), lock pawl (5.2) and connector (5.3), one end of described lock pawl body (5.1) is provided with connector (5.3), and the other end is fixed 8-12 lock pawls (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220432120 CN202900220U (en) | 2012-08-29 | 2012-08-29 | Novel lock claw type sleeve thermal stress compensator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220432120 CN202900220U (en) | 2012-08-29 | 2012-08-29 | Novel lock claw type sleeve thermal stress compensator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202900220U true CN202900220U (en) | 2013-04-24 |
Family
ID=48120903
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220432120 Expired - Fee Related CN202900220U (en) | 2012-08-29 | 2012-08-29 | Novel lock claw type sleeve thermal stress compensator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202900220U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104747150A (en) * | 2013-12-31 | 2015-07-01 | 中国石油化工集团公司 | Thermo-sensitive type heat compensator |
| CN105257222A (en) * | 2015-10-26 | 2016-01-20 | 中国石油集团西部钻探工程有限公司 | Thermo-sensitive thermal stress compensator with corrugated pipe |
| CN106223868A (en) * | 2016-08-26 | 2016-12-14 | 新疆华隆油田科技股份有限公司 | Thermal production well steam injection string telescopic compensator |
| CN115354985A (en) * | 2022-06-29 | 2022-11-18 | 中国地质大学（武汉） | Thermal-sensitive casing protection method and device for thermal injection well |
-
2012
- 2012-08-29 CN CN 201220432120 patent/CN202900220U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104747150A (en) * | 2013-12-31 | 2015-07-01 | 中国石油化工集团公司 | Thermo-sensitive type heat compensator |
| CN105257222A (en) * | 2015-10-26 | 2016-01-20 | 中国石油集团西部钻探工程有限公司 | Thermo-sensitive thermal stress compensator with corrugated pipe |
| CN105257222B (en) * | 2015-10-26 | 2017-10-17 | 中国石油集团西部钻探工程有限公司 | Heat-sensitive type bellows thermal stress compensator |
| CN106223868A (en) * | 2016-08-26 | 2016-12-14 | 新疆华隆油田科技股份有限公司 | Thermal production well steam injection string telescopic compensator |
| CN115354985A (en) * | 2022-06-29 | 2022-11-18 | 中国地质大学（武汉） | Thermal-sensitive casing protection method and device for thermal injection well |
| CN115354985B (en) * | 2022-06-29 | 2023-12-29 | 中国地质大学（武汉） | Thermal injection well thermosensitive casing protection method and device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130424 Termination date: 20180829 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |