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专利名称：Method for drilling a wellbore using a bi-center drill bit
发明人：Beaton, Timothy Paul,Truax, David,Young,
Thomas L.
申请号：EP01401948.3申请日：20010719公开号：EP1174583A2公开日：20020123
专利附图：
摘要：A method is disclosed for drilling a wellbore. The method includes operating aturbine-type mud motor having a bi-center drill bit coupled to it, and applying an axial
force to the bit which is selected so that the bit drills in a directionally stable manner. Inone embodiment, the motor is a steerable motor operated to maintain a selectedtrajectory of the wellbore.
申请人：SMITH INTERNATIONAL, INC.
地址：16740 Hardy Street, P.O. Box 60068 Houston, Texas 77032 US
国籍：US
代理机构：Weihs, Bruno
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