CN202338278U - Oil pipe uniflow apparatus for horizontal well - Google Patents

Oil pipe uniflow apparatus for horizontal well Download PDF

Info

Publication number
CN202338278U
CN202338278U CN 201120426454 CN201120426454U CN202338278U CN 202338278 U CN202338278 U CN 202338278U CN 201120426454 CN201120426454 CN 201120426454 CN 201120426454 U CN201120426454 U CN 201120426454U CN 202338278 U CN202338278 U CN 202338278U
Authority
CN
China
Prior art keywords
piston
top connection
oil pipe
spring
horizontal well
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
Application number
CN 201120426454
Other languages
Chinese (zh)
Inventor
张镇
张文华
贾洪战
张映辉
李洪俊
王云云
孙淑东
刘进鹏
党伟
王贵军
常青
高岑
孙晓飞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CNPC Bohai Drilling Engineering Co Ltd
Original Assignee
CNPC Bohai Drilling Engineering Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by CNPC Bohai Drilling Engineering Co Ltd filed Critical CNPC Bohai Drilling Engineering Co Ltd
Priority to CN 201120426454 priority Critical patent/CN202338278U/en
Application granted granted Critical
Publication of CN202338278U publication Critical patent/CN202338278U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to an oil pipe uniflow apparatus for a horizontal well, is used for drilling oil gas of horizontal wells, and belongs to development tools of petroleum wellhole. The oil pipe uniflow apparatus for the horizontal well comprises an upper joint, a spring, a piston and a lower joint, and is characterized in that the upper joint is in a shape of a long tube; the spring is mounted in the inner cavity of the upper joint; the piston is mounted at the bottom of the spring; the lower joint is connected with the upper joint so as to seal the piston in the lower end of the inner cavity of the upper joint; and the outer wall of the upper joint is formed with a liquid inlet hole. The tool is in a well; when the pressure out of an oil pipe is higher than the pressure in the oil pipe, the pressure pushes the piston upwards for the area difference of the piston, the lower end of the piston is separated from the lower joint, the liquid out of the oil pipe enters the oil pipe from the liquid inlet hole on the upper joint, and at this time, the spring is compressed; when pressures in and out of the oil pipe are approximately balanced, the spring pushes the piston to reset, the liquid inlet hole is closed, and the tool is in a close state, so that the inner and outer parts of the oil pipe cannot be communicated.

Description

Horizontal well is with oil pipe single current device
Technical field
The utility model relates to a kind of horizontal well with oil pipe single current device, is used for the oil-gas mining of oil development horizontal well, belongs to oil pit shaft developing instrument.
Background technology
At present, during the petroleum horizontal well construction, on oil pipe, need to connect the oil pipe single current device that horizontal well is used, can get in the oil pipe, make the oil pipe internal and external pressure balance to guarantee the outer liquid of oil pipe.Because the particularity of horizontal well, conventional oil pipe single current device structure can't satisfy on the horizontal well and use, and construction brings very big obstruction to horizontal well.
The utility model content
The purpose of the utility model is to provide a kind of horizontal well with oil pipe single current device, can guarantee that the outer liquid of oil pipe can get in the oil pipe, makes the oil pipe internal and external pressure balance, with being communicated with inside and outside the oil pipe.
The utility model adopts following technical scheme, and promptly a kind of horizontal well is made up of top connection, spring, piston and lower contact with oil pipe single current device; It is characterized in that top connection is long tubular, there is the tubing round thread box at the two ends of top connection all car, and the top connection inner chamber has circular step; Spring is installed in the top connection inner chamber below the top connection circular step, piston is installed, piston axes hollow in the top connection inner chamber of spring bottom; The external diameter of the epimere of piston is greater than the external diameter of the hypomere of piston, and the lateral wall of piston epimere contacts with the sealing of top connection intracavity sidewall, and lower contact is tubular; The upper/lower terminal of lower contact all car has the tubing round thread pin thread; The upper end of lower contact is connected with the lower end of top connection, and with the lower end of piston closes at the top connection inner chamber, the upper end step medial surface of the bottom of piston hypomere and lower contact is tightly connected; Form an annular space between top connection outer wall and the piston lower end outer wall, on the cylindric outer wall of the top connection that annular space belongs to, evenly have four radially inlet openings.
Above-mentioned horizontal well is with oil pipe single current device, in the lateral wall of piston epimere and the bottom of top connection intracavity sidewall place of being tightly connected and piston hypomere and the upper end step medial surface place of being tightly connected of lower contact " O " RunddichtringO is housed all.
The operating principle of the utility model is connected this horizontal well on the tubing string with oil pipe single current device, and together following in well with tubing string.When the pressure outside the oil pipe is higher than the pressure in the oil pipe; Because the difference in areas of piston; The force piston stroking upward that oil pipe is outer, " O " RunddichtringO of the lower end of piston and lower contact breaks away from, and the outer inlet opening of pressure in top connection of oil pipe gets in the oil pipe; At this moment, the compression spring is in confined state; When the pressure inside and outside the oil pipe during near balance, in the effect of compression spring, piston reset, the inlet opening in the top connection is closed, and horizontal well oil pipe single current device is in closed condition, can not be communicated with inside and outside making oil pipe.
The utility model has been realized the inside and outside connection of the oil pipe that needs in the horizontal well operation to characteristics research, the design of horizontal well casing programme, and the effect with way flow; Simple in structure, be communicated with, current limliting is reliable.
Description of drawings
Figure is that the horizontal well of the utility model is with oil pipe single current device structure chart
In the drawings: top connection 1, spring 2, piston 3, lower contact 4, inlet opening 5, " O " RunddichtringO 6.
The specific embodiment
Below in conjunction with accompanying drawing, the structure of the utility model is further specified, as shown in the figure; A kind of horizontal well is made up of top connection 1, spring 2, piston 3 and lower contact 4 with oil pipe single current device, it is characterized in that top connection 1 is long tubular; There is the tubing round thread box at the two ends of top connection 1 all car, and top connection 1 inner chamber has circular step, and spring 2 is installed in top connection 1 inner chamber below top connection 1 circular step; In the top connection inner chamber of spring 2 bottoms piston 3 is installed, piston 3 axle center hollows, the external diameter of the epimere of piston 3 is greater than the external diameter of the hypomere of piston 3; The lateral wall of piston 3 epimeres contacts with the sealing of top connection 1 intracavity sidewall; Lower contact 4 is tubular, and the upper/lower terminal of lower contact 4 all car has the tubing round thread pin thread, and the upper end of lower contact 4 is connected with the lower end of top connection 1; Piston 3 is enclosed in the lower end of top connection 1 inner chamber; The bottom of piston 3 hypomeres and the upper end step medial surface of lower contact 4 are tightly connected, and form an annular space between top connection 1 outer wall and the piston 3 lower end outer walls, on the cylindric outer wall of the top connection that annular space belongs to, evenly have four radially inlet openings 5.
The horizontal well of the utility model is with oil pipe single current device, in the lateral wall of piston 3 epimeres and the bottom of top connection intracavity sidewall place of being tightly connected and piston hypomere and the upper end step medial surface place of being tightly connected of lower contact " O " RunddichtringO 6 is housed all.
All and the utility model structural similarity or adopt the technical scheme of same structure design thinking all to fall into the scope of the utility model protection, the utility model has been realized the purpose of horizontal well with oil pipe single current device, and is simple in structure, connection, current limliting are reliable.

Claims (2)

1. a horizontal well is made up of top connection (1), spring (2), piston (3) and lower contact (4) with oil pipe single current device, it is characterized in that top connection (1) is long tubular; There is the tubing round thread box at the two ends of top connection (1) all car; Top connection (1) inner chamber has circular step, and spring (2) is installed in top connection (1) inner chamber below top connection (1) circular step, in the top connection inner chamber of spring (2) bottom piston (3) is installed; Piston (3) axle center hollow; The external diameter of the epimere of piston (3) is greater than the external diameter of the hypomere of piston (3), and the lateral wall of piston (3) epimere contacts with the sealing of top connection (1) intracavity sidewall, and lower contact (4) is tubular; The upper/lower terminal of lower contact (4) all car has the tubing round thread pin thread; The upper end of lower contact (4) is connected with the lower end of top connection (1), and piston (3) is enclosed in the lower end of top connection (1) inner chamber, and the bottom of piston (3) hypomere and the upper end step medial surface of lower contact (4) are tightly connected; Form an annular space between top connection (1) outer wall and piston (3) the lower end outer wall, on the cylindric outer wall of the top connection that annular space belongs to, evenly have four radially inlet openings (5).
2. horizontal well as claimed in claim 1 is with oil pipe single current device, it is characterized in that the lateral wall of described piston (3) epimere and the bottom of top connection (1) intracavity sidewall place of being tightly connected and piston (3) hypomere and the upper end step medial surface place of being tightly connected of lower contact (4) all be equipped with " O " RunddichtringO (6).
CN 201120426454 2011-11-02 2011-11-02 Oil pipe uniflow apparatus for horizontal well Expired - Fee Related CN202338278U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201120426454 CN202338278U (en) 2011-11-02 2011-11-02 Oil pipe uniflow apparatus for horizontal well

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201120426454 CN202338278U (en) 2011-11-02 2011-11-02 Oil pipe uniflow apparatus for horizontal well

Publications (1)

Publication Number Publication Date
CN202338278U true CN202338278U (en) 2012-07-18

Family

ID=46486971

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201120426454 Expired - Fee Related CN202338278U (en) 2011-11-02 2011-11-02 Oil pipe uniflow apparatus for horizontal well

Country Status (1)

Country Link
CN (1) CN202338278U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104196491A (en) * 2014-08-20 2014-12-10 何富全 Oil-water well hydraulic power assisted oil sleeve technological communication device
CN111874853A (en) * 2020-08-11 2020-11-03 南雄科大科技有限公司 Light-cured resin coating filling device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104196491A (en) * 2014-08-20 2014-12-10 何富全 Oil-water well hydraulic power assisted oil sleeve technological communication device
CN104196491B (en) * 2014-08-20 2016-07-06 何富全 Oil water well hydraulic power-assisted oil jacket technique intercommunicating device
CN111874853A (en) * 2020-08-11 2020-11-03 南雄科大科技有限公司 Light-cured resin coating filling device

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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: 20120718

Termination date: 20151102

EXPY Termination of patent right or utility model