Comprehensive testing device and method for coal bed strain, seepage, displacement and flow jetting

A comprehensive test and seepage technology, applied in the direction of mining fluid, earthwork drilling, wellbore/well components, etc., can solve the problem of wasting resources, save energy, save test time, and avoid energy waste

Active Publication Date: 2019-12-03
CHONGQING UNIV
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  • Claims
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Problems solved by technology

[0004] Aiming at the limitations of the current test piece box simulating the seepage tests of various gases in coal samples, and the waste of resources for the gas seepage test and jet flow test alone, the present invention intends to provide a coal seam strain, seepage, displacement and jet flow test The comprehen

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  • Comprehensive testing device and method for coal bed strain, seepage, displacement and flow jetting
  • Comprehensive testing device and method for coal bed strain, seepage, displacement and flow jetting
  • Comprehensive testing device and method for coal bed strain, seepage, displacement and flow jetting

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Example Embodiment

[0034] Below by embodiment and in conjunction with accompanying drawing, the present invention is further described:

[0035] combine figure 1 — image 3 As shown in the figure, a comprehensive test device for coal seam strain, seepage, displacement and jet flow is mainly composed of a coal chamber, a support leg 13, a pressure sensor 14, a high pressure valve 15, a vent valve 16, a desiccant 17, a gas flow meter 18, and a vibrator 19. , ultrasonic generator 20, methane gas source 21, seepage displacement gas source 22, hand pump 23, resistivity tester 24, gas storage tank 25, air control valve 26, bursting disc assembly 27, release cylinder 28, strain measurement The sealed container 29 and the strain gauge 30 are composed.

[0036] Among them, the coal chamber is mainly composed of a round steel cylinder 1, a circumferential pressure transmission sleeve 2, a T-shaped head 3, a PEEK sleeve 4, a conical steel sleeve 5, a right piston sleeve 6, a right first pressure sleeve 7, ...

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Abstract

The invention discloses a comprehensive testing device for coal bed strain, seepage, displacement and flow jetting. The comprehensive testing device comprises a coal core chamber, a vibrator, an ultrasonic wave generator, a methane gas source, a seepage and displacement gas source, a hand rocking pump, a specific resistance determinator, a gas storing tank, a gas control valve, a bursting disc assembly, a releasing cylinder, a pressure sensor, a high-pressure valve, a drying agent, a gas flowmeter, a strain measurement sealing container and a strain gauge. Meanwhile, the invention further provides a comprehensive testing method for coal bed strain, seepage, displacement and flow jetting. The method comprises the steps of equipment leakage testing, high-pressure gas seepage testing, high-pressure gas displacement testing, high-pressure gas flow jetting testing, specific resistance determining testing and high-pressure strain measuring. The comprehensive testing device is used for carrying out testing of successfully cracking a coal sample after gas seeps a coal core, meanwhile, coal sample gas displacement testing, specific resistance determining of the coal core under high pressureand gas seeping, and coal bed high-pressure strain measuring can be carried out, and therefore the test result is closer to the true situation.

Description

technical field [0001] The invention belongs to a comprehensive test device and method for coal samples, which is used for the test of successfully cracking the coal sample after gas permeates the coal core, and can also carry out the gas displacement test of the coal sample, the resistance of the coal core under high pressure and gas permeation. rate measurement and high-pressure strain measurement of coal seams to make the test results closer to the real situation. Background technique [0002] Gas percolation refers to the flow of gas in porous media. The fundamental difference between gas percolation and liquid percolation is that gas has greater compressibility, and in the process of percolation, the volume changes with temperature and pressure. Gas jet refers to the flow of gas ejected from nozzles, orifices, and slits. For coal seam mining, the coal seam is in the underground layer, and it is inevitably subjected to gas seepage. Gas jet fracturing is usually used fo...

Claims

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Application Information

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IPC IPC(8): E21B49/00E21B47/10E21B43/16E21B43/26
CPCE21B43/168E21B43/26E21B47/10E21B49/00
Inventor 张东明王浩蒋志刚刘超鲁俊赵宏刚
Owner CHONGQING UNIV
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