Yang Changjie, Zhang Shaohe, SU Hong'an, Zhao Chongquan, WU Hao. The application test of the new double-barreled and single-acting coring tool in fractured formation[J]. COAL GEOLOGY & EXPLORATION, 2014, 42(1): 87-89. DOI: 10.3969/j.issn.1001-1986.2014.01.021
Citation: Yang Changjie, Zhang Shaohe, SU Hong'an, Zhao Chongquan, WU Hao. The application test of the new double-barreled and single-acting coring tool in fractured formation[J]. COAL GEOLOGY & EXPLORATION, 2014, 42(1): 87-89. DOI: 10.3969/j.issn.1001-1986.2014.01.021
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The application test of the new double-barreled and single-acting coring tool in fractured formation

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  • Aiming at the problem of low coring recovery rate in extremely fractured formations,the paper designs a new double-barreled and single-acting coring tool,which comprises tool joint,single acting motion,inner pipe,outer pipe,core device and advance bore and lateral jet bit etc.Through the application test in Yangla mine,it can greatly improve the coring recovery rate in extremely fractured formations.
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