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Plunger

A plunger and jacket technology, applied in the field of gas production tools, can solve the problems that the plunger cannot slide freely, it is difficult to adapt to deep wells or ultra-deep wells, etc., and achieve the effect of increasing the scope of use and improving the effect of drainage and gas production

Active Publication Date: 2020-06-02
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the exploration and development of oil and gas wells has been developing towards deep and ultra-deep layers, but the plunger in the prior art cannot slide freely in the variable-diameter combined tubing string, so it is difficult to adapt to deep or ultra-deep wells

Method used

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with accompanying drawing.

[0033] figure 1 A plunger 100 according to the invention is shown. Such as figure 1 As shown, the plunger 100 includes a fishing neck 1 , an upper casing 5 , a lower casing 9 and a cartridge assembly 30 . Wherein, the salvage neck 1 is columnar. The upper casing 5 is cylindrical, arranged at the lower end of the fishing neck 1, and can move axially relative to the fishing neck 1. A first communication hole 103 communicating with the inside and outside is provided on the wall of the upper casing 5 . The lower jacket 9 is cylindrical and is arranged on the lower end of the upper jacket 5 , and its inner cavity communicates with the inner cavity of the upper jacket 5 . Furthermore, the lower casing 9 is configured to be able to move relative to the upper casing 5 in the axial direction. A second communication hole 110 is provided on the wall of the lower outer casing 9 t...

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PUM

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Abstract

The invention relates to a plunger. The plunger comprises a fishing neck, a cylindrical upper outer sleeve, a cylindrical lower outer sleeve and a rubber cylinder assembly, wherein the cylindrical upper outer sleeve is arranged at the lower end of the fishing neck and can move axially relative to the fishing neck, and a first communication hole communicating inside and outside is formed in the wall of the upper outer sleeve, the cylindrical lower outer sleeve is arranged at the lower end of the upper outer sleeve in a communicating mode and can move axially relative to the upper outer sleeve,and a second communication hole communicating inside and outside is formed in the wall of the lower outer sleeve; one end of the rubber cylinder assembly is arranged on the outer wall of the upper outer sleeve and the other end of the rubber cylinder assembly is arranged on the lower outer sleeve, the rubber cylinder assembly is provided with a rubber cylinder, the second communication hole and the first communication hole are cut off at the inner cavity of the lower outer sleeve and the rubber cylinder is stressed to expand in the first state, and the second communication hole communicates with the first communication hole in the inner cavity of the lower outer sleeve and the rubber cylinder is retracted in the second state. The plunger can be suitable for the variable-diameter oil pipe,the application range of the plunger can be improved, and the plunger is particularly suitable for deep and ultra-deep oil and gas wells.

Description

technical field [0001] The invention relates to the technical field of gas extraction tools, in particular to a plunger. Background technique [0002] The plunger gas lift technology uses the plunger as the mechanical interface between gas and liquid, and uses the energy of the gas well itself to push the plunger to lift the liquid periodically in the tubing, which can effectively prevent the gas from moving up and the liquid from falling back, and reduce the "slipping" effect of the liquid , play the role of aiding drainage and increase the efficiency of intermittent gas lift. [0003] At present, the exploration and development of oil and gas wells has been developing towards deep and ultra-deep layers, but the plunger in the prior art cannot slide freely in the variable-diameter composite tubing string, so it is difficult to adapt to deep or ultra-deep wells. Therefore, it is necessary to invent a plunger to adapt to the variable diameter combined oil pipe. Contents of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B53/14E21B33/127
CPCF04B53/14F04B53/143E21B33/127
Inventor 胡顺渠侯治民陈晨刘涛刘通
Owner CHINA PETROLEUM & CHEM CORP
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