发明名称 METHOD AND APPARATUS FOR TAKING CORE SAMPLES
摘要 IMPROVED METHOD AND APPARATUS FOR TAKING CORE SAMPLES A coring apparatus which includes a drill bit and a receiving member. The drill bit includes discrete cutting elements for cutting the outer dimension of the core. The receiving member is adapted to lie proximate to the discrete cutting surfaces and to receive the core as it leaves the cutting surfaces. Additionally, drilling fluid is directed away from the cut core.
申请公布号 CA1311743(C) 申请公布日期 1992.12.22
申请号 CA19890604892 申请日期 1989.07.06
申请人 EASTMAN CHRISTENSEN COMPANY 发明人 TIBBITTS, GORDON A.
分类号 E21B10/48;E21B10/56;E21B10/567;E21B10/60;E21B25/00 主分类号 E21B10/48
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