Coalbed methane mining auxiliary equipment

Abstract

The invention discloses coalbed methane mining auxiliary equipment. According to the coalbed methane mining auxiliary equipment, a mode of centralizing local area extraction is adopted, and the extraction efficiency and reliability can be effectively improved without the excessive extraction power; a ring flange positioning assembly is used for positioning, auxiliary hollow rods can be swung at acertain amplitude with an angle adjustment assembly as a supporting point, in the way, the auxiliary hollow rods can conveniently extend into coalbed extraction drilling holes, and the layout efficiency of extraction pipes is improved; extraction rods extend into the auxiliary hollow rods to protect the extraction rods, and the risk that fractures are produced due to the fact that the extraction rods are placed in the drilling holes is prevented; the space between a first expansion sleeve assembly and a second expansion sleeve assembly can be conveniently adjusted to realize key extraction; and expansion of the first expansion sleeve assembly and the second expansion sleeve assembly is more reliable, a hydraulic mode is used for expansion, a porous inner expansion sleeve is arranged internally, expansion can be more uniform, the tightness is improved, and the service life is prolonged.

Description

technical field [0001] The invention relates to the technical field of coal bed methane mining, in particular to auxiliary equipment for coal bed methane mining. Background technique [0002] Coalbed methane is a hydrocarbon gas stored in coal seams with methane as the main component, mainly adsorbed on the surface of coal matrix particles, and partially free in coal pores or dissolved in coal seam water. It is an associated mineral resource of coal and belongs to unconventional natural gas. . It is very clean after burning and hardly produces any waste gas. It is a good fuel for industry, chemical industry, power generation and residential life. When the air concentration of coalbed methane reaches 5%-16%, it will explode when encountering an open flame, which is the root cause of coal mine gas explosion accidents. When coalbed methane is directly discharged into the atmosphere, its greenhouse effect is about 21 times that of carbon dioxide, and it is extremely destructiv...

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Problems solved by technology

[0003] For coalbed methane, because its content and concentration have a certain locality, for coalbed methane drainage, it is necessary to focus on local extraction, and the current drainage strategy is generally only for the entire drainage Boreholes are used for extraction as a whole, which leads to low extraction efficiency, requires a large extraction power, and consumes a lot of power, which affects the efficiency and reliability of coalbed methane extraction.

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