Global Geology     2010 13 (3-4):  165-170    ISSN: 1673-9736:  CN: 22-1371/P

Air flow calculation of reverse circulation drilling technique with air DTH hammer
HUANG Yong1, ZHU Lihong2, YIN Kun1 and BO Kun1
1. College of Construction Engineering,Jilin University,Changchun 130026,China; 2. School of Petroleum Engineering,China University of Petroleum,Qingdao 266555,shandong,China
Received null  Revised null  Online 2010-12-25
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