CN201818272U - High-pressure oil and gas well anti-jack device - Google Patents
High-pressure oil and gas well anti-jack device Download PDFInfo
- Publication number
- CN201818272U CN201818272U CN2010205665155U CN201020566515U CN201818272U CN 201818272 U CN201818272 U CN 201818272U CN 2010205665155 U CN2010205665155 U CN 2010205665155U CN 201020566515 U CN201020566515 U CN 201020566515U CN 201818272 U CN201818272 U CN 201818272U
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- China
- Prior art keywords
- coupling flange
- protective sleeve
- upper coupling
- oil
- diameter
- Prior art date
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- Expired - Fee Related
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Abstract
The utility model provides an anti-jack device for a high-pressure oil and gas well, and belongs to a device used for oil field production. The anti-jack device comprises an upper coupling flange with a center hole; a protective sleeve is arranged below the upper coupling flange; a sealing ring is arranged between the upper coupling flange and the protective sleeve; the lower part of the protective sleeve is sleeved with an upper flange plate of a wellhead blowout preventor; the inner diameter of the protective sleeve is larger than the diameter of the center hole on the coupling flange; and the upper coupling flange is fixed together with the upper flange plate of the wellhead blowout preventor through a plurality of screw bolts. When in use, the anti-jack device is installed between the wellhead blowout preventor and an oil pipe elevator, the diameter of the center hole on the upper coupling flange is a slightly larger than the outer diameter of an operation pipe string, and the inner diameter of the protective sleeve is a slightly larger than the outer diameter of a collar on the operation pipe string. When oil-gas rises, the upper coupling flange can only penetrate through the operation pipe string to block off the collar, so that the operation pipe string can be prevented from rising continuously, and a casing annular space can be sealed through the protective sleeve, thereby avoiding occurrence of an accident such as incontrollable blowout and the like, and improving the safety of operation.
Description
Technical field
The utility model provides a kind of field produces device, especially a kind of anti-ejection device that is installed on the well mouth of oil well.
Background technology
In oil field oil recovery manufacturing process, some is a high-pressure oil-gas well, and down-hole pressure is higher, has the possibility of scurrying on the oil gas in the production; The long-term dead well of some second working, when boring the plug job execution, in case bore oil reservoir, the downhole oil atmospheric pressure is scurried suddenly.Scurry on the oil gas cause easily operating tool string on scurry, can cause blowout out of control when serious, have potential safety hazard.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of high-pressure oil-gas well to prevent ejection device, to improve the safety of operation.
The utility model is to realize like this, high-pressure oil-gas well is prevented ejection device, it has the last terminal pad of band centre bore, below the last terminal pad casing is arranged, between last terminal pad and the casing joint ring is arranged, the casing bottom is sleeved on the wellhead blowout preventor upper flange plate, and the internal diameter of casing is greater than the diameter of last terminal pad centre bore, and last terminal pad and wellhead blowout preventor upper flange plate are by a plurality of bolt together.
Adopt the anti-ejection device of said structure, be installed in during use between wellhead blowout preventor and the pipe elevator, the internal diameter that the diameter of last terminal pad centre bore can be slightly larger than working string external diameter, casing can be slightly larger than the external diameter of the box cupling on the working string.When scurrying on oil gas takes place, last terminal pad can only pass working string and block box cupling, and working string is scurried on can not continuing, the salable firmly oil jacket annular space of casing, thus avoided the generation of accidents such as blowout out of control, improved the safety of operation.
Description of drawings
Fig. 1 is the front view of the utility model structure.
The specific embodiment
The embodiment that provides below in conjunction with accompanying drawing illustrates concrete structure of the present utility model.
As shown in drawings, the high-pressure oil-gas well of the utility model is prevented ejection device, it has the last terminal pad 1 of band centre bore, casing 4 is arranged below the last terminal pad, joint ring 2 is arranged between last terminal pad and the casing, the casing bottom is sleeved on wellhead blowout preventor upper flange plate 5, and the internal diameter of casing is greater than the diameter of last terminal pad centre bore, and last terminal pad and wellhead blowout preventor upper flange plate are fixed together by a plurality of bolts 3.
Casing can be made with high pressure resistant elastomeric material.
The diameter of last terminal pad centre bore can be 74 millimeters, and the internal diameter of casing can be 78 millimeters.Like this, when scurrying accident on oil gas takes place, the box cupling on the working string can be blocked in the lower surface that last terminal pad is positioned at the casing inner chamber, prevents to push up on it further.
Claims (1)
1. high-pressure oil-gas well is prevented ejection device, it is characterized in that, it has the last terminal pad (1) of band centre bore, casing (4) is arranged below the last terminal pad, joint ring (2) is arranged between last terminal pad and the casing, the casing bottom is sleeved on wellhead blowout preventor upper flange plate (5), and the internal diameter of casing is greater than the diameter of last terminal pad centre bore, and last terminal pad and wellhead blowout preventor upper flange plate are fixed together by a plurality of bolts (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205665155U CN201818272U (en) | 2010-10-12 | 2010-10-12 | High-pressure oil and gas well anti-jack device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205665155U CN201818272U (en) | 2010-10-12 | 2010-10-12 | High-pressure oil and gas well anti-jack device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201818272U true CN201818272U (en) | 2011-05-04 |
Family
ID=43916234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205665155U Expired - Fee Related CN201818272U (en) | 2010-10-12 | 2010-10-12 | High-pressure oil and gas well anti-jack device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201818272U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104033119A (en) * | 2014-06-23 | 2014-09-10 | 平顶山天安煤业股份有限公司 | Device for preventing high confined water from ejecting drill |
| CN109372461A (en) * | 2018-11-27 | 2019-02-22 | 中国石油集团川庆钻探工程有限公司 | Method for resetting wellhead device out of control of blowout |
-
2010
- 2010-10-12 CN CN2010205665155U patent/CN201818272U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104033119A (en) * | 2014-06-23 | 2014-09-10 | 平顶山天安煤业股份有限公司 | Device for preventing high confined water from ejecting drill |
| CN109372461A (en) * | 2018-11-27 | 2019-02-22 | 中国石油集团川庆钻探工程有限公司 | Method for resetting wellhead device out of control of blowout |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110504 Termination date: 20111012 |