CN205206782U - Oil casing thread connection air tightness detection packer - Google Patents
Oil casing thread connection air tightness detection packer Download PDFInfo
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- CN205206782U CN205206782U CN201521022333.0U CN201521022333U CN205206782U CN 205206782 U CN205206782 U CN 205206782U CN 201521022333 U CN201521022333 U CN 201521022333U CN 205206782 U CN205206782 U CN 205206782U
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Abstract
The utility model discloses an oil casing thread connection gas tightness detects packer, it includes top connection, packing element one, packing element two, goes up the piston, lower clutch and mandrel, and top connection, packing element one, go up the piston, lower piston, packing element two, lower clutch connect gradually, and all overlap on the mandrel, go up the piston, down the piston and constitute the working chamber with the mandrel, and it has the aperture to open on the piston down. The packer adopts a single set of power source, does not use a one-way valve system, realizes synchronous setting and high-pressure air inlet of the packer in a throttling pressure difference mode, has a simple structure, is convenient to operate, and solves the problems of complex system, complex operation and high risk caused by the adoption of a two-step mode of the existing common hermetic packer.
Description
Technical field
The utility model relates to one and to be threaded testing tool, relates in particular to a kind of high-pressure gas well oil pipe, casing threads connects high pressure gas sealing propertytest instrument.
Background technology
Along with the development of oil-gas exploration and development is with deep, the particularly Devoting Major Efforts To Developing of Sichuan, Xinjiang region deep well high pressure natural gas, need to carry out perforation, acidifying, add the operation of the reservoir reconstruction such as sand, gaslift, tubing string will bear immense pressure, HTHP high sulfur-containing natural gas is full of for a long time again in tubing string after going into operation, the general production cycle reaches more than 10 years, so require very high to the gas tightness of tubing and casing screwed connection, once tubing and casing screw thread leaks, likely cause leaking of natural gas to cause fire oil well to scrap, economic loss is huge; For densely populated area, the consequence that causes the accident is hardly imaginable especially.
The core tool that tubing and casing screwed connection gas tightness detects is pneumatic sealing test packer, when needs detect, staff is lowered into tubing and casing screwed connection position it, by setting, airtight annular space is formed in screw thread position, in this confined space, injecting gases at high pressure again, whether have Leakage Gas, thus detect the quality of screwed connection if detecting screw thread position.
At present, the working method of tubing and casing pneumatic sealing test packer has two kinds, and be all, pressurization sets to be carried out with high pressure admission testing process substep: a kind of be China National Offshore Oil Corporation is representative " tubing and casing sealing propertytest manages interior packer ", (grant number is CN203188963U), it adopts two cover dynamical systems, first by suppressing power in the hydraulic setting passage of packer, promote piston and make packing element, then moving in high pressure detection gas to packer high pressure gas experience envelope passage, pneumatic sealing test is carried out.Another kind take Xinjiang Sinopetroleum Technology Inc. as representative " a kind of threaded connection high-pressure gas seal detection tool " (publication number is CN102346089A), it adopts a set of dynamical system, in conjunction with one way valve pattern, namely, first make packer setting form confined space in screw thread position by gas pressurized, that continues that pressurization reaches one way valve opens pressure, after one-way valve opens, inject gases at high pressure to confined space, carry out the pneumatic sealing test of screw thread.The first working method, system has two cover dynamical systems, system complex, complex operation, and relatively singly overlaps dynamical system, and many high-voltage power supplies, risk is higher.The second working method, packer size is little, one-way valve system is installed thereon, also there is the problem of system complex, in addition owing to taking packer body dimension, the intensity of packer also decreases, meanwhile, pneumatic sealing test, on a bite Oil/gas Well, is the process of a continuous hundreds of time, one way valve easily damages in continuous use procedure repeatedly, there is higher security risk.
Summary of the invention
The utility model is intended to for the defect existing for above-mentioned prior art and deficiency, a kind of tubing and casing screwed connection gas tightness is provided to detect packer, it adopts singly overlaps power source, and do not use one-way valve system, realize packer setting and high pressure admission by chock pressure difference mode and synchronously carry out, structure is simple, easy to operate, solve the system complex that conventional hermetic seal packer at present adopts two step modes to cause, complex operation, the problem that risk is high.
The utility model realizes by adopting following technical proposals:
A kind of tubing and casing screwed connection gas tightness detects packer, it is characterized in that: comprise top connection, packing element one, packing element two, upper piston, lower piston, lower contact and axle, top connection, packing element one, upper piston, lower piston, packing element two, lower contact connect successively, and be all placed in axle, upper piston, lower piston and axle form working chamber, and lower piston has aperture.
Also include high pressure line, high pressure line is connected with top connection.
Compared with prior art, the beneficial effect that reaches of the utility model is as follows:
When carrying out pneumatic sealing test, hermetic seal packer is positioned over the thread position of oil pipe and lower oil pipe, after high pressure detection gas in high pressure gas pipeline flows to working chamber, flowed out by aperture, produce chock pressure difference, this pressure reduction promotes upper piston and lower piston, and extruding packing element sets on the connector of oil pipe and oil pipe composition, form confined space, external high pressure tracheae continues air feed until confined space reaches force value needed for screw thread pneumatic sealing test.After detection terminates, by the pressure release of high pressure gas pipeline, the gas in confined space working chamber flows out, and packing element loses extruding setting force, immediately deblocking, and whole operation terminates.As can be seen here, the utility model adopts and singly overlaps power source, and do not use one-way valve system, realize packer setting and high pressure admission by chock pressure difference mode synchronously to carry out, structure is simple, easy to operate, solves the system complex that conventional hermetic seal packer at present adopts two step modes to cause, complex operation, the problem that risk is high.
Accompanying drawing explanation
Below in conjunction with specification drawings and specific embodiments, the utility model is described in further detail, wherein:
Fig. 1 is the state diagram before hermetic seal packer detection
State diagram when Fig. 2 is the work of hermetic seal packer
Mark in figure: oil pipe, 14-working space, 15-axle under 1-hermetic seal packer, 2-top connection, 3-sealing ring, 4-packing element, 5-upper piston, 6-aperture, 7-lower piston, 8-lower contact, 9-confined space, 10-high pressure line, 11-thread, the upper oil pipe of 12-, 13-.
Detailed description of the invention
With reference to Figure of description 1 and 2, as preferred forms of the present utility model, it comprises top connection 2, packing element one, packing element two, upper piston 5, lower piston 7, lower contact 8, high pressure line 10 and axle 15, top connection 2, packing element one, upper piston 5, lower piston 7, packing element two, lower contact 8 connect successively, and be all placed in axle 15, upper piston 5, lower piston 7 form working chamber with axle 15, and lower piston 7 have aperture 6.High pressure line 10 is connected with top connection 2.
When carrying out pneumatic sealing test, hermetic seal packer is positioned over the thread position of oil pipe and lower oil pipe, after high pressure detection gas in high pressure gas pipeline flows to working chamber, flowed out by aperture 6, produce chock pressure difference, this pressure reduction promotes upper piston 5 and lower piston 7, and extruding packing element one and packing element two set on the connector of oil pipe and oil pipe composition, form confined space, external high pressure tracheae continues air feed until confined space reaches force value needed for screw thread pneumatic sealing test.After detection terminates, by the pressure release of high pressure gas pipeline, the gas in confined space and working chamber flows out, and packing element loses extruding setting force, immediately deblocking, and whole operation terminates.
Claims (2)
1. a tubing and casing screwed connection gas tightness detects packer, it is characterized in that: comprise top connection (2), packing element one, packing element two, upper piston (5), lower piston (7), lower contact (8) and axle (15), top connection (2), packing element one, upper piston (5), lower piston (7), packing element two, lower contact (8) connect successively, and be all placed in axle (15), upper piston (5), lower piston (7) and axle (15) form working chamber, and lower piston (7) has aperture (6).
2. a kind of tubing and casing screwed connection gas tightness according to claim 1 detects packer, and it is characterized in that: also include high pressure line (10), high pressure line (10) is connected with top connection (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521022333.0U CN205206782U (en) | 2015-12-10 | 2015-12-10 | Oil casing thread connection air tightness detection packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521022333.0U CN205206782U (en) | 2015-12-10 | 2015-12-10 | Oil casing thread connection air tightness detection packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205206782U true CN205206782U (en) | 2016-05-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521022333.0U Active CN205206782U (en) | 2015-12-10 | 2015-12-10 | Oil casing thread connection air tightness detection packer |
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| Country | Link |
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| CN (1) | CN205206782U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107702901A (en) * | 2017-09-12 | 2018-02-16 | 中国石油天然气股份有限公司 | K344 packer deblocking capability test device and method under horizontal well repeated transformation working condition |
| CN112901138A (en) * | 2019-11-17 | 2021-06-04 | 中石化石油工程技术服务有限公司 | Sleeve air-tight seal detection device |
-
2015
- 2015-12-10 CN CN201521022333.0U patent/CN205206782U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107702901A (en) * | 2017-09-12 | 2018-02-16 | 中国石油天然气股份有限公司 | K344 packer deblocking capability test device and method under horizontal well repeated transformation working condition |
| CN107702901B (en) * | 2017-09-12 | 2019-07-05 | 中国石油天然气股份有限公司 | K344 packer deblocking capability test method under horizontal well repeated transformation working condition |
| CN112901138A (en) * | 2019-11-17 | 2021-06-04 | 中石化石油工程技术服务有限公司 | Sleeve air-tight seal detection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210719 Address after: 100007 No. 9 North Main Street, Dongcheng District, Beijing, Dongzhimen Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Chuanqing Drilling Engineering Co.,Ltd. Address before: 610051 Sichuan science and Technology Department, 3 Chuan Qing Road, 1 section, Fu Qing Road, Chenghua District, Chengdu, China Patentee before: CNPC Chuanqing Drilling Engineering Co.,Ltd. |