CN101158272A - Oil well shearing type casing tube break prevention compensation pipe - Google Patents
Oil well shearing type casing tube break prevention compensation pipe Download PDFInfo
- Publication number
- CN101158272A CN101158272A CNA2007101353509A CN200710135350A CN101158272A CN 101158272 A CN101158272 A CN 101158272A CN A2007101353509 A CNA2007101353509 A CN A2007101353509A CN 200710135350 A CN200710135350 A CN 200710135350A CN 101158272 A CN101158272 A CN 101158272A
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- Prior art keywords
- pipe
- bushing
- oil well
- well
- oil
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Abstract
The invention relates to an anti-breaking flexible pipe used for an oil well cutting-styled bushing, in particular to a pipe used for a part which is above a concrete face and on an outside of the oil layer bushing of a water-injection zone of an oil field so as to prevent that after water is injected to the well a stratum rises to damage the bushing. The invention mainly adopts a bushing connection loop on an inner pipe, and the loop is connected with an upper bushing and is arranged in an outer pipe. A seal ring and a spring are arranged between the outer pipe and an inner pipe; a pin is arranged on an upper part, and the lower end of the outer pipe is connected with a lower coupling which is connected with pipelines under-well. The invention has simple, compact and proper structure, and can prevent that after water is injected to well the stratum rises to damage the bushing for once the stratum rises the flexible pipe breaks away from the inner pipe and slides by a certain distance so as to keep the bushing from breaking, and the oil well still can keep safe production.
Description
Technical field
The present invention relates to a kind of oil well shearing type casing tube break prevention compensation pipe, specifically be used for more than the outer cement face of production string pipe in oil-field flooding oil district, prevent to rise on the stratum after oil well is because of water filling and damage sleeve pipe.
Background technology
In oil field development, owing to water filling or other reason, payzone upper formation topping up is sprained press liter, cause not interval isolation casing failure, production string is fragile, makes the oil well can not ordinary production.
Summary of the invention
The objective of the invention is to overcome above-mentioned weak point, thereby a kind of oil well shearing type casing tube break prevention compensation pipe is provided, in the oil field development operation, pipe broke away from the interior barrel bolt nail of telescoping tube was cut off when rising on the stratum, can prevent casing failure.
Main solution of the present invention is achieved in that
The present invention mainly adopts splice sleeve box cupling on inner pipe, and connects with upper sleeve, and interior pipe places outer tube, in the middle of outer tube and interior pipe, joint ring is installed, spring, and pin is housed on top, the outer tube lower end connects with lower contact, and joint connects parts casing pipe down down.
Compared with the prior art the present invention has the following advantages:
The present invention is simple, compact and reasonable for structure; Can prevent to rise on the stratum after oil well is because of water filling and damage sleeve pipe, at production string, the above adding of cement sealing face casing tube break prevention compensation pipe, when rising on the stratum, pipe breaks away from the telescoping tube, and a segment distance slides, can prevent casing failure, oil well still can keep safety in production.
Description of drawings
Fig. 1 is a structural representation of the present invention.
The specific embodiment
Embodiment during following the present invention incites somebody to action in conjunction with the accompanying drawings is further described:
The present invention mainly is made up of casing coupling 1, interior pipe 2, outer tube 3, pin 4, spring 5, joint ring 6 and lower contact 7 etc.
The present invention mainly adopts and connect casing coupling 1 on interior pipe 2, and connect with upper sleeve, and concentric locking collar is connected in the outer tube 3, upper and lower part between outer tube 3 and interior pipe 2 is equipped with joint ring 6 and spring 5, and one group of pin 4 is housed on top, outer tube 3 lower ends connect with lower contact 7, and lower contact 7 connects parts casing pipe down.
Operating principle of the present invention:
When rising on the stratum; connect and be solidificated in sleeve pipe in the stratum also along with rising; between interior pipe 2 and outer tube 3, produce axial load; (determined by the pin size) to cut off pin when this load reaches setting, interior pipe and outer tube produce the segment distance that relatively moves, and discharge load; the protection upper sleeve is not broken; the effect of spring is the vibration that the buffering pin ruptures suddenly and produces, and sealing holding tube internal pressure still can be kept the safety in production oil well.
Claims (1)
1. oil well shearing type casing tube break prevention compensation pipe, it is characterized in that adopting at interior pipe (2) and go up connection casing coupling (1), interior pipe (2) is placed in the outer tube (3), at middle joint ring (6) and the spring (5) of being equipped with of outer tube (3) and interior pipe (2), and pin (4) is housed on top, and outer tube (3) lower end connects with lower contact (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101353509A CN101158272A (en) | 2007-11-07 | 2007-11-07 | Oil well shearing type casing tube break prevention compensation pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101353509A CN101158272A (en) | 2007-11-07 | 2007-11-07 | Oil well shearing type casing tube break prevention compensation pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101158272A true CN101158272A (en) | 2008-04-09 |
Family
ID=39306487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101353509A Pending CN101158272A (en) | 2007-11-07 | 2007-11-07 | Oil well shearing type casing tube break prevention compensation pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101158272A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016101680A1 (en) * | 2014-12-24 | 2016-06-30 | 新奥气化采煤有限公司 | Underground gasification well-cementing method and well structure |
| CN109250888A (en) * | 2018-11-21 | 2019-01-22 | 璁稿嘲 | A kind of sludge treatment equipment |
| CN114293926A (en) * | 2022-01-12 | 2022-04-08 | 淮北工业建筑设计院有限责任公司 | Anti-breaking well protection pipe |
-
2007
- 2007-11-07 CN CNA2007101353509A patent/CN101158272A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016101680A1 (en) * | 2014-12-24 | 2016-06-30 | 新奥气化采煤有限公司 | Underground gasification well-cementing method and well structure |
| CN109250888A (en) * | 2018-11-21 | 2019-01-22 | 璁稿嘲 | A kind of sludge treatment equipment |
| CN114293926A (en) * | 2022-01-12 | 2022-04-08 | 淮北工业建筑设计院有限责任公司 | Anti-breaking well protection pipe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20080409 |