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In-situ testing system and method for gas content in underground coal seams while drilling

A technology for coal seam gas and in-situ testing, which is applied to measurement devices, earthwork drilling, extraction of undisturbed cores, etc., can solve the problems of gas and long sampling time, and achieve the advantages of simple process, high operation efficiency, and elimination of gas loss. Effect

Active Publication Date: 2022-01-28
重庆安标检测研究院有限公司 +1
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

The invention solves the problem of long sampling time and gas caused by stopping the drilling and replacing the special closed coring tube in the conventional airtight coring process. Smaller size coal cores to eliminate gas loss during sampling

Method used

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  • In-situ testing system and method for gas content in underground coal seams while drilling
  • In-situ testing system and method for gas content in underground coal seams while drilling
  • In-situ testing system and method for gas content in underground coal seams while drilling

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Embodiment Construction

[0064] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic concept of the present invention, and the following embodiments and the features in the embodiments can be combined with each other in the case of no conflict.

[0065] Wherein, the accompanying drawings are for illustrative purposes only, and represent only schematic diagrams, rather than physical drawings, and should...

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Abstract

The invention relates to an in-situ testing system and method for in-situ testing of gas content in coal seams in coal mines, belonging to the technical field of coal mine safety. Clamping device connection; high-pressure water or compressed air is connected to the tail drill pipe through the special water tail. During the drilling process, the coal core is directly drilled without retreating the drill pipe to replace the drill bit, and the coal core is cooled by cold air, so that The moisture inside it solidifies to prevent the coal core from escaping gas; the coal core is sent to the laboratory, and after the temperature of the coal core rises, the solidified moisture turns into a liquid state, and then the gas escapes out of the coal core storage pipe, and passes through Measure the natural and pulverized gas content of the coal core storage pipe, and combine the industrial analysis, porosity and adsorption gas constant to calculate the gas content of the coal seam.

Description

technical field [0001] The invention belongs to the technical field of coal mine safety, and relates to an in-situ testing system and method for in-situ testing of gas content in coal seams under coal mines. Background technique [0002] Coal mine gas (also known as "coalbed methane") is a kind of unconventional natural gas associated with coal and mainly stored in coal seams in the state of adsorption. Its main component is methane, with a small amount of ethane, propane and butane, generally Contains hydrogen sulfide, carbon dioxide, nitrogen and moisture, and traces of inert gases such as helium and argon. Gas is the main factor that threatens the safe production of mines, but it is also a kind of clean energy. Therefore, under the situation of tightening international energy situation, as a high-quality, efficient and clean energy, the prospect of large-scale development and utilization of coal mine drainage gas is attractive. Clarifying the characteristics of coalbed ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B25/04E21B25/08G01N1/22G01N30/02G01N30/06G01N30/20
CPCE21B25/04E21B25/08G01N30/02G01N30/06G01N30/20G01N1/22G01N2030/025G01N2030/201
Inventor 程波邹银辉王振张锋向衍斌杨亮秦玉兵颜文学黄光利马智勇
Owner 重庆安标检测研究院有限公司