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Low-pressure gas well eddy current plunger water drainage and gas collection device

A technology for drainage gas production and low-pressure gas production, which can be used in the fields of fluid production, earth-moving drilling and production, wellbore/well components, etc.

Active Publication Date: 2015-04-15
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] With the continuous development of the Sulige gas field, some gas wells have entered the middle and late stage of low pressure and low production, and their own energy is no longer enough to push the plunger and the liquid above it to the wellhead, seriously affecting the lifting efficiency

Method used

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  • Low-pressure gas well eddy current plunger water drainage and gas collection device
  • Low-pressure gas well eddy current plunger water drainage and gas collection device
  • Low-pressure gas well eddy current plunger water drainage and gas collection device

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Embodiment

[0018] refer to Figures 1 to 8 Embodiments of the present invention are further described:

[0019] The device consists of the first vortex downhole seating device A, the second vortex downhole seating device B, the first plunger C and the second plunger D, the first plunger C is set between the first vortex downhole seating device A and the second vortex Between the downhole seating devices B, the second plunger D is arranged above the second vortex downhole seating device B.

[0020] The first vortex downhole seating device A: the outer wall below the middle step of the first vortex body 1 is covered with the first buffer spring 2 and penetrated into the first connecting cylinder 3, and the outer wall of the reduced diameter section of the lower part of the first connecting cylinder 3 is threaded to the first seating head 4 , the outer wall of the first seating head 4 is set with the first seater 5 , the inner wall of the first seater 5 is provided with steps, and the bott...

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Abstract

The invention discloses a low-pressure gas well eddy current plunger water drainage and gas collection device. The device is designed in order to effectively drain gas well accumulated liquid under the condition that the gas well energy is unchanged. The device consists of first and second eddy current underground seating devices and first and second plungers, wherein the first eddy current underground seating device is used for accelerating a gas flow at the bottom of a gas well and buffering falling impact of the first plunger; the second eddy current underground seating device is used for accelerating the middle gas flow of the gas well and buffering falling impact of the second plunger. According to the device, during well opening, the first plunger and accumulated liquid above the first plunger are pushed by the bottom gas flow of the gas well accelerated by the first eddy current underground seating device to the second eddy current underground seating device and the second plunger, the gas flow with speed loss is accelerated again by the second eddy current underground seating device in a relay manner to push the second plunger and the liquid lifted by the first plunger to smoothly reach the wellhead, so that safe and effective well liquid lift under the condition that the gas well energy is unchanged is realized.

Description

technical field [0001] The invention relates to a low-pressure gas well vortex plunger drainage and gas production device, which belongs to the technical field of drainage and gas production in oil and gas fields. Background technique [0002] At present, plunger gas lift is an effective and economical drainage gas recovery method in domestic and foreign gas fields. The plunger is used as the mechanical interface between gas and liquid, and the energy of the gas well itself is used to push the plunger to periodically lift liquid in the tubing. Effectively prevent the gas from going up and the liquid from falling back, reduce the "slip" effect of the liquid, and increase the efficiency of intermittent gas lift. [0003] With the continuous development of the Sulige gas field, some gas wells have entered the middle and late stage of low pressure and low production, and their own energy is no longer enough to push the plunger and the liquid above it to the wellhead, seriously a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/00
CPCE21B43/122
Inventor 杨旭东白晓弘于志刚刘双全田伟程小莉肖述琴卫亚明陈勇
Owner PETROCHINA CO LTD
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