Non-closed continuous lifting plunger drainage device and non-closed continuous lifting plunger drainage construction method

A plunger, continuous technology, applied in the field of natural gas development, can solve the problems affecting the production efficiency of gas wells, and achieve the effect of prolonging the self-spraying period and improving the ability

Pending Publication Date: 2019-01-11
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

This method leads to intermittent production of gas wells, which affects the production efficiency of gas wells to a certain extent

Method used

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  • Non-closed continuous lifting plunger drainage device and non-closed continuous lifting plunger drainage construction method

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Embodiment Construction

[0014] In order to better understand the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0015] The invention aims at putting the plunger into the production pipe string without shutting down the well and waiting for the plunger to go down when the gas well is in production. In the case of normal production, it can still be smoothly lowered to the position of the retainer. Under the action of its own gravity and inertia, when the plunger of the projectile shrinks down to the position of the retainer, the lower plunger of the plunger hits the retainer. , so that the upper and lower bullets expand, form a seal with the inner wall of the pipe string, and run upwards under the upward pressure of the gas well wellbore, so as to realize the drainage and recovery technology that the gas well is put in without shutting down the well, and the bullets are automatically opened after they are in place...

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Abstract

The invention provides a non-closed continuous lifting plunger drainage device and a non-closed continuous lifting plunger drainage construction method. The device is mainly composed of key parts suchas a fishing head, an upper ejector rod, an upper elastic block, a lower elastic block and a lower ejector rod which are sequentially connected from up to down, wherein the upper and lower elastic blocks are in a contracted state when a plunger is placed in a production pipe string, the outer diameter is small, when a gas well is in a normal production state, the plunger can still smoothly enterthe position of a locker, under the action of gravity and inertia, when the plunger descends to the position of the locker, a lower ejector rod of the plunger knocks against the locker, the upper andlower elastic blocks are made to expand to form sealing with an inner wall of the pipe string, the plunger under the action of the uplink pressure of a gas wellbore, non-closed gas well delivery is achieved, after the plunger is at the proper place, the elastic blocks are automatically opened to achieve the automatic lifting drainage technology. The device is advantaged in that continuous gas wellexploitation can be achieved, and gas well production efficiency is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of natural gas development, and in particular relates to a non-shut-in type continuous lifting plunger drainage device and a construction method. Background technique [0002] With the prolongation of the production time of the gas well, the production of the gas well will decrease due to the insufficient supply capacity of the formation, which will reduce the gas flow rate in the wellbore and cannot carry out the liquid accumulation at the bottom of the well, and eventually water flooding will occur, so that the gas well will be forced to shut down , have a great impact on the profitable development of gas wells. There are many gas well drainage and gas recovery technologies, which are suitable for different production stages of gas wells. Among them, the plunger drainage technology can make full use of formation energy, prolong the self-spraying cycle of gas wells, and has low one-time investment and low m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/00
CPCE21B43/122
Inventor 荣莽徐冠军王大江徐兴权蔡凌孙志扬
Owner CHINA PETROLEUM & CHEM CORP
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