Coal bed gas exploitation anti-reflection device and method

Abstract

The invention relates to the technical field of coal bed gas exploitation, and provides a coal bed gas exploitation anti-reflection device and method. The coal bed gas exploitation anti-reflection device comprises an oil pipe suitable for being installed in a drill hole, a piston and a lower fixing block are arranged on the lower portion of the oil pipe, a stamping chamber is arranged between the piston and the lower fixing block, and a first through hole is formed in the lower fixing block; the high-voltage switch assembly is mounted at the first through hole, and the high-voltage switch assembly enables the first through hole to be switched between a conduction state in which the first through hole is communicated with the drill hole and a closed state in which the first through hole is isolated from the drill hole; the high-pressure liquid conveying assembly is communicated with the upper part of the oil pipe; and the gas conveying assembly communicates with the stamping chamber through a gas conveying pipeline, and a switch element is arranged on the gas conveying pipeline. According to the coal bed gas exploitation anti-reflection device, continuous impact on the coal bed is achieved, the permeability of the coal bed is rapidly improved, the coal bed gas extraction efficiency is improved, and the coal bed gas exploitation anti-reflection device has no requirement for a water source and is easy to operate, low in cost and small in stratum pollution.

Description

technical field [0001] The present application relates to the technical field of coalbed methane mining, and in particular, to a device and method for increasing the permeability of coalbed methane mining. Background technique [0002] Coalbed methane refers to the presence of methane (CH) in coal measures. 4 ) as the main component, mainly adsorbed on the surface of coal matrix particles, and partially freed in coal pores or dissolved in coal seam water. Hydrocarbon gas is an associated mineral resource of coal and belongs to the category of unconventional natural gas; Coalbed methane is also called coal mine gas. If it is not effectively drained and drained before coal mining, it may bring unsafe factors to coal mining and seriously restrict the safe production of coal mines. Therefore, both from the perspective of coalbed methane exploitation and coal mine gas control, it is necessary to extract coalbed methane on the ground in the early stage of coal mine development. ...

AI Technical Summary

Problems solved by technology

For this reason, this application proposes a coalbed methane mining anti-permeability device, which is used to solve the technical problems that it is difficult to quickly improve the permeability of the coal seam and the coalbed methane extraction efficiency is low in the coal seam anti-permeability process in the related art, and achieves The continuous impact of the coal seam overcomes the shortcomings of the poor continuity of the previous pulse anti-reflection technology, quickly improves the permeability of the coal seam, and improves the efficiency of coalbed methane extraction, and there is no requirement for water sources, which is convenient for gas drainage in coal mines and on the ground. Popularized and used in coalbed methane well stimulation, easy to operate, low cost, little pollution to formation

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