CN2797618Y - Wellhead sealing device for single crank, double-stroke and flexible rope type oil sucking system - Google Patents

Wellhead sealing device for single crank, double-stroke and flexible rope type oil sucking system Download PDF

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Publication number
CN2797618Y
CN2797618Y CN 200520109279 CN200520109279U CN2797618Y CN 2797618 Y CN2797618 Y CN 2797618Y CN 200520109279 CN200520109279 CN 200520109279 CN 200520109279 U CN200520109279 U CN 200520109279U CN 2797618 Y CN2797618 Y CN 2797618Y
Authority
CN
China
Prior art keywords
oil
big
flexible rope
crank
plunger
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 200520109279
Other languages
Chinese (zh)
Inventor
张佳民
韩修庭
胡松华
焦振强
贾维娜
任华
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.)
Daqing Oilfield Co Ltd
Original Assignee
Daqing Oilfield 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 Daqing Oilfield Co Ltd filed Critical Daqing Oilfield Co Ltd
Priority to CN 200520109279 priority Critical patent/CN2797618Y/en
Application granted granted Critical
Publication of CN2797618Y publication Critical patent/CN2797618Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to a wellhead sealing device for a single crank, double-stroke and flexible rope type oil pumping system, which mainly solves the problem that a rope of a rope type oil pumping machine is difficult to seal a wellhead. The utility model is characterized in that a lower big cross joint (1) is connected with an upper big cross joint (2) which is provided with an upper oil tube hanger (3) inside; a pump barrel (4) which is positioned in an oil tube and is provided with a plunger (5) inside is connected under the upper oil tube hanger (3); the top and the bottom of the plunger (5) are respectively connected with the oil pumping machine and an oil-well pump through chains (6). When in use, the wellhead sealing device for a single crank, double-stroke and flexible rope type oil sucking system not only has good sealing performance, but also can play a pumping-assisting role.

Description

Single crank double stroke flexible rope oil pumping system well mouth sealing device
Technical field:
The utility model relates to used well mouth sealing device in the oil recovery field, oil field, especially single crank double stroke flexible rope oil pumping system well mouth sealing device.
Background technology:
Because single crank double stroke flexible rope beam-pumping unit has been banned sucker rod, change rope into and drive the downhole pump motion, and the sealing difficulty of rope at the well head place increases, and easily produces leakage phenomenon, influences ordinary production, is unfavorable for environmental protection.
The utility model content:
In order to overcome the deficiency of flexible rope beam-pumping unit rope and well head difficult sealing, the utility model provides a kind of single crank double stroke flexible rope oil pumping system well mouth sealing device, this single crank double stroke flexible rope oil pumping system well mouth sealing device is at when work good seal not only, and can also work the effect of taking out that helps when work.
The technical solution of the utility model is: tubing hanger under this single crank double stroke flexible rope oil pumping system well mouth sealing device comprises in the big four and continuous oil pipe thereof, be connected with big four on the following big four, last big four is built-in with tubing hanger, be connected with the pump barrel that places in the oil pipe under the last tubing hanger, pump barrel is built-in with plunger, and plunger links to each other with oil pumper and oil well pump respectively by chain up and down.
Above-mentioned last tubing hanger links to each other by taper pipe thread with pump barrel.
The beneficial effect that the utlity model has is: this single crank double stroke flexible rope oil pumping system well mouth sealing device is owing to adopted such scheme, by plunger well liquid is separated in well head, solved the problem of flexible rope beam-pumping unit rope and well head difficult sealing, and in the repeating motion up and down of plunger, because the pressure reduction of plunger lower end is greater than the pressure reduction of upper end, thereby play the effect of taking out that helps, reduce the lifting force of oil pumper, reduce energy consumption of electrical machinery, effectively reduce production costs.
Description of drawings:
Accompanying drawing 1 is a structural representation of the present utility model.
Big four under the 1-among the figure, the last big four of 2-, the last tubing hanger of 3-, 4-pump barrel, 5-plunger, 6-chain.
The specific embodiment:
Below in conjunction with accompanying drawing will the utility model is described in further detail:
By shown in Figure 1, tubing hanger under this single crank double stroke flexible rope oil pumping system well mouth sealing device comprises in the big four 1 and continuous oil pipe thereof, be connected with big four 2 on the following big four 1, last big four 2 is built-in with tubing hanger 3, last tubing hanger 3 times is connected with pump barrel 4 by taper pipe thread, pump barrel 4 places in the oil pipe, and pump barrel 4 is built-in with plunger 5, and plunger 5 links to each other with oil pumper and oil well pump respectively by chain 6 up and down.Because plunger 5 pumps in pump barrel 4, well liquid to be separated in well head, well liquid can only flow out from the ring cavity between pump barrel 4 and oil pipe, thereby plays sealing function; Again since the pressure reduction of plunger 5 lower ends greater than the pressure reduction of plunger 5 upper ends, when oil pumper moves upward, the well hydraulic coupling of plunger 5 lower ends has a lifting force that makes progress, so just reduced oil pumper load-carrying load, play the effect of taking out that helps, reduced the motor power consumption of oil pumper, effectively reduced production costs.

Claims (2)

1, a kind of single crank double stroke flexible rope oil pumping system well mouth sealing device, tubing hanger under comprising in the big four (1) and continuous oil pipe thereof, it is characterized in that: be connected with big four (2) on the following big four (1), last big four (2) is built-in with tubing hanger (3), be connected with the pump barrel (4) that places in the oil pipe under the last tubing hanger (3), pump barrel (4) is built-in with plunger (5), and plunger (5) links to each other with oil pumper and oil well pump respectively by chain (6) up and down.
2, single crank double stroke flexible rope oil pumping system well mouth sealing device according to claim 1 is characterized in that: go up tubing hanger (3) and link to each other by taper pipe thread with pump barrel (4).
CN 200520109279 2005-06-01 2005-06-01 Wellhead sealing device for single crank, double-stroke and flexible rope type oil sucking system Expired - Fee Related CN2797618Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200520109279 CN2797618Y (en) 2005-06-01 2005-06-01 Wellhead sealing device for single crank, double-stroke and flexible rope type oil sucking system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 200520109279 CN2797618Y (en) 2005-06-01 2005-06-01 Wellhead sealing device for single crank, double-stroke and flexible rope type oil sucking system

Publications (1)

Publication Number Publication Date
CN2797618Y true CN2797618Y (en) 2006-07-19

Family

ID=36868858

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 200520109279 Expired - Fee Related CN2797618Y (en) 2005-06-01 2005-06-01 Wellhead sealing device for single crank, double-stroke and flexible rope type oil sucking system

Country Status (1)

Country Link
CN (1) CN2797618Y (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101382051B (en) * 2008-10-19 2012-02-22 马子奇 Hollow stem water-mixed wellhead device
CN101550813B (en) * 2009-05-15 2013-02-27 张佳民 Low-level seal assembly in wellhead

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101382051B (en) * 2008-10-19 2012-02-22 马子奇 Hollow stem water-mixed wellhead device
CN101550813B (en) * 2009-05-15 2013-02-27 张佳民 Low-level seal assembly in wellhead

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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: 20060719

Termination date: 20140601