Concentric tube jet pump drainage gas recovery wellhead device and drainage gas recovery method thereof

Abstract

The invention relates to the technical field of drainage gas recovery devices, in particular to concentric tube jet pump drainage gas recovery wellhead device and a drainage gas recovery method thereof. The device comprises a gas recovery tree, a gas and water separator and a plunger pump. A lower port of a casing pipe of the gas recovery tree fixedly communicates with an underground jet pump through an oil pipe, a mixed fluid pipeline communicates between a right side oil pipe gate valve of the gas recovery tree and an inlet of the gas and water separator, a power liquid pipeline communicatesbetween a water outlet in the bottom of the gas and water separator and a water inlet of the plunger pump, a high-pressure power liquid pipeline communicates between a water outlet of the plunger pump and a top gate valve of the gas recovery tree, a casing pipeline communicates with a right side casing pipe gate valve of the gas recovery tree, and a main gas transmission pipeline communicates with the outlet end of the casing pipeline. The concentric tube jet pump drainage gas recovery wellhead device is reasonable and compact in structure, and convenient to use, through combining of mechanisms such as the gas recovery tree, the gas and water separator, the plunger pump, the underground jet pump and the like, drainage gas production is achieved, the well cylinder accumulated liquid is reduced, the gas production rate is improved, and gas well production recovery can be achieved.

Description

technical field [0001] The invention relates to the technical field of drainage and gas recovery devices, and relates to a concentric tube jet pump drainage and gas recovery wellhead and a method for drainage and gas recovery. Background technique [0002] During the development of gas wells, as the formation pressure drops, the intrusion of formation water and the accumulation at the bottom of the well greatly affect the production of gas wells. When the water-gas ratio increases to a certain value, the lack of gas production and liquid carrying capacity will cause fluid accumulation in the wellbore, resulting in a decrease in gas production. In order to resume production, it is necessary to increase efficient means of drainage and gas recovery. Contents of the invention [0003] The present invention provides a concentric tube jet pump drainage gas recovery wellhead and its drainage gas recovery method, which overcomes the above-mentioned deficiencies in the prior art, ...

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Problems solved by technology

[0003] The present invention provides a concentric tube jet pump drainage gas recovery wellhead and its drainage gas recovery method, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the problem of gas production decline caused by liquid accumulation at the bottom of existing gas wells

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