CN202520264U - Buffer type back-off telescopic compensator - Google Patents
Buffer type back-off telescopic compensator Download PDFInfo
- Publication number
- CN202520264U CN202520264U CN 201220161626 CN201220161626U CN202520264U CN 202520264 U CN202520264 U CN 202520264U CN 201220161626 CN201220161626 CN 201220161626 CN 201220161626 U CN201220161626 U CN 201220161626U CN 202520264 U CN202520264 U CN 202520264U
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- CN
- China
- Prior art keywords
- overcoat
- telescopic compensator
- type back
- axle
- square shaft
- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to the technical field of well maintenance of oil fields and gas fields, in particular to a buffer type back-off telescopic compensator which is suitable for the well maintenance and salvage operation of the oil fields and the gas fields. The buffer type back-off telescopic compensator comprises a lower connector (1) and an upper connector (9) and is characterized in that the inner side of the upper part of the lower connector (1) is fixedly connected with one end of an outer sleeve (2) through an internal thread; the other end of the outer sleeve (2) is in threaded connection with a square sleeve (7); the inner side of the lower part of the upper connector (9) is fixedly connected with a square shaft (6) through an inner thread; and the square shaft (6) is sleeved in the square sleeve (7). The buffer type back-off telescopic compensator can perform axial compensation during back-off operation, play the role of buffering when lifting pretension force is applied, and apply continuous lifting force on a back-off salvage spear in the back-off process.
Description
Technical field
The utility model relates to oil, well workover technology field, gas field, the buffer-type back-off telescopic compensator in particularly a kind of oil, gas field well workover, the fishing.
Background technology
It is effectively down-hole accident processing method that back-off is salvaged, and telescopic compensator is used to compensate the axial displacement that produces when screw thread moves back button in the back-off fishing.Especially in not kill-job of gas well workover treatment, need in the lubricator of snubbing serving machine, carry out back-off for the tool string of raising the output tubing strings such as original pressure break, acidifying and salvage and handle.Because tubing string is very short, the elongation of tubing string is very little, the upper lifting force when the well in operation operator is difficult to hold back-off.Have, need apply a lasting upper lifting force to left hand fishing spear during back-off and could guarantee left hand fishing spear not unexpected " slipping out of the hand ", conventional telescopic compensator can't satisfy on-the-spot construction needs.
Summary of the invention
The purpose of the utility model provides a kind of buffer-type back-off telescopic compensator that increases the operability of construction; It both can play the nose balance effect in back-off operation; Can also also can in the back-off process, apply a lasting upper lifting force in the last effect of playing buffering when carrying pretension to left hand fishing spear.
The technical scheme that its technical problem that solves the utility model adopts is: buffer-type back-off telescopic compensator; Comprise lower contact and top connection; It is characterized in that: the upper inner of lower contact is fixedly connected with an end of overcoat through internal thread; The other end side of the being threaded cover of overcoat, the lower inside of top connection is fixedly connected with square shaft through internal thread, in the square shaft side of the being socketed in cover.
The endoporus of described side's cover is the regular hexagon structure, and the external diameter of square shaft matees with the endoporus of side's cover.
The upper edge of described side's cover is fixed with the nylon buffering ring.
The bottom of the described square shaft axle that has been threaded, the lower edge of the oriented outer lug in axle bottom, the bottom interior wall of the lower edge applying overcoat of axle, the inwall place, middle part of overcoat is fixed with block, is equipped with spring between the lower edge of link stopper and axle.
Described block is to be connected between overcoat and the axle through the step that is arranged on overcoat medium position inwall place.
The beneficial effect of the utility model is: owing to be socketed with square shaft in side's cover, make and can overlap co-rotation in transfer torque drive side when square shaft rotates that square shaft can also endwisely slip in side's cover simultaneously, is used to compensate the axial displacement that screw thread moves back generation when detaining.The spring of putting between overcoat and the axle simultaneously, when the telescopic compensator axial tension, axle and square shaft move upward with top connection together; The inwall that block is fixed on overcoat can not concentric shafts move together, and this moment, spring began compression, and the elastic force of spring acts on overcoat and the axle; Play cushioning effect in the process last carrying; Before back-off operation, need apply certain upper lifting force to tool string, this moment, telescopic compensator was in the state of being fully withdrawn, and spring is in the compression limit position.In the process of back-off, telescopic compensator leans on the elastic force of spring that left hand fishing spear is continuously applied upper pulling force, can avoid left hand fishing spear unexpected " slipping out of the hand ".
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is described further.
Fig. 1 is the nature structural representation of embodiment expansion loop;
Fig. 2 is the A-A sectional view of Fig. 1;
Fig. 3 is the extended state structural representation of embodiment expansion loop;
Among the figure: 1, lower contact; 2, overcoat; 3, axle; 4, spring; 5, block; 6, square shaft; 7, side's cover; 8, nylon buffering ring; 9, top connection.
The specific embodiment
Embodiment 1: shown in this buffer-type back-off telescopic compensator nature structural representation of Fig. 1; Comprise lower contact 1 and top connection 9, the upper inner of lower contact 1 is fixedly connected with an end of overcoat 2 through internal thread, the other end side of the being threaded cover 7 of overcoat 2; The lower inside of top connection 9 is fixedly connected with square shaft 6 through internal thread; In square shaft 6 sides of the being socketed in cover 7, shown in the A-A sectional view of Fig. 2, the endoporus of side's cover 7 is the regular hexagon structure; The external diameter of square shaft 6 matees with the endoporus of side's cover 7; Such structure makes can overlap 7 co-rotation in transfer torque drive side when square shaft 6 rotates, and square shaft 6 can also endwisely slip in side's cover 7 simultaneously, is used to compensate the axial displacement that screw thread moves back generation when detaining.
The bottom of square shaft 6 axle 3 that has been threaded, the lower edge of the oriented outer lug in axle 3 bottoms, the bottom interior wall of the lower edge applying overcoat 2 of axle 3; The middle part inwall of overcoat 2 goes out to be fixed with block 5, is equipped with spring 4 between the lower edge of link stopper 5 and axle 3, when the telescopic compensator axial tension; See Fig. 3; Axle 3 moves upward with top connection 9 with square shaft 6 together, and the inwall that block 5 is fixed on overcoat 2 can not concentric shafts 3 move together, and this moment, spring 4 began compression; The elastic force of spring 4 acts on overcoat 2 and the axle 3, plays cushioning effect in the process last carrying.
Before back-off operation, need apply certain upper lifting force to tool string, this moment, telescopic compensator was in the state of being fully withdrawn, and spring 4 is in the compression limit position.In the process of back-off, telescopic compensator leans on the elastic force of spring 4 that left hand fishing spear is continuously applied upper pulling force, can avoid left hand fishing spear unexpected " slipping out of the hand ".
Embodiment 2: present embodiment and embodiment 1 structure are basic identical; Difference is that the upper edge of the cover 7 in the side is fixed with nylon buffering ring 8; After back-off success, side's cover 7 is moving on fast the elastic force effect under, nylon buffering ring 8 can the side of avoiding overlap 7 and top connection 9 between rigid shock.Block 5 is to be connected between overcoat 2 and the axle 3 through the step that is arranged on overcoat 2 medium position inwall places simultaneously, and owing to the effect of step can not concentric shafts 3 be moved together.
Parts that present embodiment is not described in detail and structure belong to well-known components and the common structure or the conventional means of the industry, here not narration one by one.
Claims (5)
1. buffer-type back-off telescopic compensator; Comprise lower contact (1) and top connection (9); It is characterized in that: the upper inner of lower contact (1) is fixedly connected with an end of overcoat (2) through internal thread; The other end side of the being threaded cover (7) of overcoat (2), the lower inside of top connection (9) is fixedly connected with square shaft (6) through internal thread, in square shaft (6) side's of being socketed in cover (7).
2. buffer-type back-off telescopic compensator according to claim 1 is characterized in that: the endoporus of described side's cover (7) is the regular hexagon structure, and the external diameter of square shaft (6) matees with the endoporus of side's cover (7).
3. buffer-type back-off telescopic compensator according to claim 1 is characterized in that: the upper edge of described side's cover (7) is fixed with nylon buffering ring (8).
4. buffer-type back-off telescopic compensator according to claim 1; It is characterized in that: the bottom of described square shaft (6) axle (3) that has been threaded; The lower edge of the oriented outer lug in axle (3) bottom; The bottom interior wall of the lower edge applying overcoat (2) of axle (3), the inwall place, middle part of overcoat (2) is fixed with block (5), is equipped with spring (4) between the lower edge of link stopper (5) and axle (3).
5. buffer-type back-off telescopic compensator according to claim 4 is characterized in that: described block (5) is to be connected between overcoat (2) and the axle (3) through the step that is arranged on overcoat (2) medium position inwall place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220161626 CN202520264U (en) | 2012-04-17 | 2012-04-17 | Buffer type back-off telescopic compensator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220161626 CN202520264U (en) | 2012-04-17 | 2012-04-17 | Buffer type back-off telescopic compensator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202520264U true CN202520264U (en) | 2012-11-07 |
Family
ID=47103217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220161626 Expired - Fee Related CN202520264U (en) | 2012-04-17 | 2012-04-17 | Buffer type back-off telescopic compensator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202520264U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103527125A (en) * | 2013-10-24 | 2014-01-22 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Backoff combination tool and method for pulling out tool with large diameter in gas well under pressure |
| CN112761581A (en) * | 2021-01-29 | 2021-05-07 | 大庆好乐知科技开发有限公司 | Soluble self-expanding type hot washing device without pressing oil layer |
-
2012
- 2012-04-17 CN CN 201220161626 patent/CN202520264U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103527125A (en) * | 2013-10-24 | 2014-01-22 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Backoff combination tool and method for pulling out tool with large diameter in gas well under pressure |
| CN103527125B (en) * | 2013-10-24 | 2016-04-20 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Major diameter tool method in a kind of back-off combination tool and with pressure gas well well |
| CN112761581A (en) * | 2021-01-29 | 2021-05-07 | 大庆好乐知科技开发有限公司 | Soluble self-expanding type hot washing device without pressing oil layer |
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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: 20121107 Termination date: 20210417 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |