Multi-layer filtration gas-liquid separation device for low-pressure gas well

Abstract

The invention discloses a multi-layer filtration gas-liquid separation device for a low-pressure gas well, comprising a barrel; the upper end of the barrel is provided with an upper end cover, the lower end of the barrel is provided with a lower end cover, the wall of the barrel close to the upper end is provided with an intake pipe, the upper end cover is provided with an exhaust pipe, the sidewall of the lower end cover is provided with a drain pipe, a T-section filter element is disposed in the barrel and comprises a horizontally arranged connecting portion, a vertically arranged filter tube and a plurality of filter sheets arranged in the filter tube, the connecting portion connects the inner wall of the barrel to the upper end surface of the filter tube, a collection strainer bent to the lower end cover along the axis of the barrel is arranged at the bottom of the filter element in the barrel, and a corrugated strainer is mounted at the upper end of the collection strainer; by forming triple filtration through the connecting portion of the filter element, the filter tube and the multiple filter sheets, filtering performance of the device is improved; solid impurities in gas-liquid mixture are filtered doubly through the collection strainer and the corrugated strainer so as to prevent the drain pipe from being blocked.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploitation equipment, in particular to a multi-layer filter gas-liquid separation device for low-pressure gas wells. Background technique [0002] In the process of oilfield exploitation, abnormal low pressure occurred in some oilfields, which brought certain difficulties to well workover. Some gas wells were exploited at low pressure, and sand was buried in the strata, which could not be cleaned up in time, which reduced the production of gas wells or even stopped production. When downhole operations are carried out without external energy supplementation, the workover fluid pollutes the formation more and more seriously, which makes the drainage period after the action continue to prolong. Therefore, it is necessary to pressurize this type of gas wells no matter during production or liquid drainage. In the prior art, a booster unit is usually used to pressurize the gas well, and the extra...

AI Technical Summary

Problems solved by technology

In the actual use process, the separation efficiency of the gas-liquid mixture is the main problem to be solved. To solve this problem, it is mostly achieved by setting complex filter elements, which makes the structure of the gas-liquid separator complex and the production cost is high.

In addition, there are some solid impurities in the gas-liquid mixture. Excessive solid impurities will block the discharge pipe, thus affecting the use of the gas-liquid separation device.

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