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| 2010, Vol. 13(3-4): 165-170 DOI: | ||
| 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 | ||
| Supporting info | ||
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