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Coalbed methane mining auxiliary equipment

A technology for auxiliary equipment and coalbed methane, which is applied in mining equipment, mining fluids, earthwork drilling, etc., can solve the problems affecting the efficiency and reliability of coalbed methane extraction, high extraction power, and low extraction efficiency, etc. Achieve the effect of improving extraction efficiency and reliability, improving airtightness and service life, and improving layout efficiency

Active Publication Date: 2019-04-12
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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.

Method used

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  • Coalbed methane mining auxiliary equipment
  • Coalbed methane mining auxiliary equipment
  • Coalbed methane mining auxiliary equipment

Examples

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Embodiment Construction

[0034] see Figure 1~4 , in an embodiment of the present invention, an auxiliary equipment for coalbed methane mining, including a positioning flange assembly, an angle adjustment assembly, an auxiliary hollow rod 1, a extraction rod 2, a moving seat assembly 1, a moving seat assembly 2, and an expansion sleeve assembly 8 and expansion sleeve assembly 2 13, wherein, the angle adjustment assembly is limited in the positioning flange assembly, and the auxiliary hollow rod 1 passes through the central hole of the angle adjustment assembly, characterized in that,

[0035] The positioning flange assembly is positioned in the coal seam drainage borehole, and the auxiliary hollow rod 1 can swing to a certain extent with the angle adjustment assembly as a fulcrum, so as to facilitate extending the auxiliary hollow rod 1 into the In the coal seam drainage borehole;

[0036] The extraction rod 2 is sleeved in the central hole 21 of the auxiliary hollow rod 1, and the inner end of the e...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/00E21F7/00
CPCE21B43/006E21F7/00
Inventor 陶树汤达祯许浩李松
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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