CN205206782U - Oil jacket pipe threaded connection gas leakproofness detects packer - Google Patents

Oil jacket pipe threaded connection gas leakproofness detects packer Download PDF

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Publication number
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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China
Prior art keywords
piston
packing
packer
pressure
connection
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CN201521022333.0U
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Chinese (zh)
Inventor
韩雄
刘飞
曾小军
杨光练
涂敖
曾建忠
卢齐
王峰
郭鸣
何博
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China National Petroleum Corp
CNPC Chuanqing Drilling Engineering Co Ltd
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CNPC Chuanqing Drilling Engineering Co Ltd
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Priority to CN201521022333.0U priority Critical patent/CN205206782U/en
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Abstract

The utility model discloses an oil jacket pipe threaded connection gas leakproofness detects packer, it includes top connection, packing element no. 1, packing element no. 2, upper piston, lower piston, lower clutch and mandrel, top connection, packing element no. 1, upper piston, lower piston, packing element no. 2, lower clutch connect gradually, and all overlap on the mandrel, upper piston, lower piston and mandrel constitution working chamber, and division have the aperture on the lower piston. Its adopts and singly to overlap the power supply, and does not use the check valve system, realize that packer setting and high -pressure air inflow go on in step through throttle pressure differential mode, simple structure, and convenient operation, it is complicated to have solved at present the system that airtight packer commonly used adopted two steps of modes to cause, complex operation, problem that the risk is high.

Description

A kind of tubing and casing screwed connection gas tightness detects packer
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).
CN201521022333.0U 2015-12-10 2015-12-10 Oil jacket pipe threaded connection gas leakproofness detects packer Active CN205206782U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201521022333.0U CN205206782U (en) 2015-12-10 2015-12-10 Oil jacket pipe threaded connection gas leakproofness detects packer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201521022333.0U CN205206782U (en) 2015-12-10 2015-12-10 Oil jacket pipe threaded connection gas leakproofness detects packer

Publications (1)

Publication Number Publication Date
CN205206782U true CN205206782U (en) 2016-05-04

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Application Number Title Priority Date Filing Date
CN201521022333.0U Active CN205206782U (en) 2015-12-10 2015-12-10 Oil jacket pipe threaded connection gas leakproofness detects packer

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Cited By (1)

* Cited by examiner, † Cited by third party
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 A kind of horizontal well repeats K344 removing seal for packer ability test device and methods under transformation operating mode

Cited By (2)

* Cited by examiner, † Cited by third party
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 A kind of horizontal well repeats K344 removing seal for packer ability test device and methods under transformation operating mode
CN107702901B (en) * 2017-09-12 2019-07-05 中国石油天然气股份有限公司 A kind of horizontal well repeats K344 removing seal for packer ability test method under transformation operating condition

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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.