首页|Study of a low-disturbance pressure-preserving corer and its coring performance in deep coal mining conditions
Study of a low-disturbance pressure-preserving corer and its coring performance in deep coal mining conditions
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With the increasing depth of coal mining,the requirements for coring devices that maintain pressure are increasing.To adapt to the special environment in deep coal seams and improve the accuracy of testing gas content,a low-disturbance pressure-preserving corer was developed.The measurement of gas con-tent using this corer was analyzed.The coring test platform was used to complete a coring function test.A pressurized core with a diameter of 50 mm was obtained.The pressure was 0.15 MPa,which was equal to the pressure of the liquid column of the cored layer,indicating that the corer can be successfully used in a mud environment.Next,a pressure test of the corer was conducted.The results showed that under conditions of low pressure(8 MPa)and high pressure(25 MPa),the internal pressure of the corer remained stable for more than 1 h,indicating that the corer has good ability to maintain pressure.Therefore,the corer can be applied at deep coal mine sites.The results of this research can be used to promote the safe exploitation of deep coal mines and the exploitation of methane resources in coalbeds.
School of Mechanical Engineering,Sichuan University,Chengdu 610065,China
College of Water Resource and Hydropower,Sichuan University,Chengdu 610065,China
Jin Shi Drill Tech Co.,Ltd,Tangshan 063004,China
Guangdong Provincial Key Laboratory of Deep Earth Sciences and Geothermal Energy Exploitation and Utilization,Institute of Deep Earth Sciences and Green Energy,College of Civil and Transportation Engineering,Shenzhen University,Shenzhen 518060,China
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National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaProgram for Guangdong Introducing Innovative and Entrepreneurial Teams of ChinaSichuan Science and Technology Program of China
NETL
NSTL
万方数据
维普
