Circular and automatic water replenishing and drainage and production equipment for coal-bed gas well

Abstract

The invention discloses a circular and automatic water drainage gas production process and equipment for a coal-bed gas well, so as to realize the purpose of circulating draining and producing and automatically replenishing water, draining water and producing gas. An output liquid pumped to the ground from a well enters into a comprehensive treatment tank after passing through an output liquid flow meter via an output liquid pipeline system; in the comprehensive treatment tank, solid particles in the output liquid are separated, the solid parts are arranged in a special device on the lower part to be centrally discharged; after metered by the liquid replenishing flow meter according to the requirement, the partial purified output liquid passes through a liquid replenishing channel and a special well mouth for replenishing the liquid to be replenished into the hohlraum of a shaft to stabilize a recovered liquid; the residual purified recovered liquid is discharged via an output liquid pipeline valve to achieve the purpose of purifying and discharging. The amount of the replenished liquid is automatically realized by the fact that a liquid replenishing control valve is controlled by a signal conditioning system and a computer control system according to the capability of the drainage and production equipment and the discharging condition of pulverized coal which enters into the shaft. A cleaning agent is replenished to clean the downhole equipment in fixed time.

Description

Technical field: [0001] The invention relates to a new type of coalbed methane well drainage gas extraction process and corresponding equipment, which is mainly used in the field of coalbed methane development drainage gas recovery technology, and is especially suitable for the development of coalbed methane wells with less drainage and coalbed methane wells with more coal powder and coal coke. used in . Background technique: [0002] As an unconventional natural gas resource, coalbed methane (commonly known as gas) has become an important resource in my country's energy replacement strategy. At present, coalbed methane development is divided into two methods: surface extraction and underground extraction. Coal bed methane ground pumping can not only obtain the clean energy that is urgently needed in China, but also solve the problems of water and gas outburst and gas emission pollution during coal seam mining. It is a business that benefits both the country and the people, ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to improve and optimize the existing drainage technology and optimize the existing drainage technology in view of the shortcomings of the existing drainage technology and equipment that cannot adapt to the small displacement, the pulverized coal entering the wellbore cannot be discharged to the ground, and the trouble-free operation time of the drainage equipment is short. Corresponding drainage equipment was designed, and a coalbed methane well circulation automatic replenishment drainage equipment was proposed

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