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Liquid-automatically supplemented rodless liquid-driven oil production device and oil production method

An oil production device and liquid flooding technology, which can be used in the fields of fluid production, earth-moving drilling, machine/engine, etc.

Active Publication Date: 2020-07-07
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an automatic liquid replenishment rodless liquid flooding oil production device and oil production method, which overcomes the problem of eccentric wear of the rod lifting rod tube in the prior art. The device and oil production method can realize automatic liquid replenishment and improve the service life. It can be used not only as a single well rodless liquid flooding oil production device, but also as a cluster well group lifting rodless liquid flooding oil production system. It is especially suitable for special well types such as horizontal wells, and is very important for the efficient development of cluster well groups

Method used

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  • Liquid-automatically supplemented rodless liquid-driven oil production device and oil production method
  • Liquid-automatically supplemented rodless liquid-driven oil production device and oil production method

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Embodiment Construction

[0068] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.

[0069] Such as Figure 1 to Figure 5 As shown, the present invention provides an automatic liquid replenishment rodless liquid flooding oil production device 100, including a surface power system 1, a downhole liquid flooding plunger pump structure and a pipe string structure;

[0070] The pipe string structure can transport the power fluid to the downhole liquid drive plunger pump structure and can provide a liquid flow channel for the oil well output liquid to be transported to the ground. The pipe string structure includes an outer pipe 21 and an inner pipe 22 arranged at coaxial intervals. One end of 21 is fixed to the wellhead 91 and the other end is sealed, and the inner pipe 22 is sealed and passed through the wellhead 91;...

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Abstract

The invention discloses a liquid-automatically supplemented rodless liquid-driven oil production device and an oil production method. The device comprises a ground power system, a downhole liquid-driven plunger pump structure and a pipe column structure, wherein the pipe column structure can convey power liquid to the downhole liquid-driven plunger pump structure and can provide a liquid flow channel for conveying oil well produced liquid to the ground; the downhole liquid-driven plunger pump structure comprises a pump barrel structure, wherein a first plunger and a second plunger are arrangedin the pump barrel structure; and the ground power system comprises an oil tank, wherein the oil tank can be in communication with an upper-stroke isolation cylinder and a lower-stroke isolation cylinder, and the lower-stroke isolation cylinder can supplement liquid to the upper-stroke isolation cylinder. The device and the oil production method can realize automatic liquid supplementation, prolong the service life, can be used as a single-well rodless liquid-driven oil production device, can also be used as a cluster well group cluster lifting rodless liquid-driven oil production system, areparticularly suitable for special well types such as horizontal wells, and are crucial for efficient development of a cluster well group.

Description

technical field [0001] The invention relates to the technical field of oil recovery in oil fields, in particular to an automatic fluid replenishment rodless liquid flooding oil recovery device and an oil recovery method. Background technique [0002] For a long time, the rod lift device is the absolute main body of artificial lift, and the number of wells used accounts for more than 94% of the number of oil wells in China. With the increasing number of special well types represented by horizontal wells, the eccentric wear of the rod lifting rod tube is becoming more and more serious. Therefore, technical personnel have been constantly exploring rodless lifting technology for many years. The electric drive rodless lifting technology represented by electric submersible screw pump and reciprocating electric submersible pump is expanding the test scope. In terms of liquid drive rodless lifting technology, the progress so far has been unsatisfactory, but the unique cluster well...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/00F04B47/08F04B9/105
CPCE21B43/129F04B47/08F04B9/105
Inventor 刘猛张建军马宝忠师俊峰赵瑞东张喜顺曹刚
Owner PETROCHINA CO LTD
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