专利名称：DRILL BITS HAVING ROTATING CUTTING
STRUCTURES THEREON
发明人：YONG, Zhou,WU, Jian申请号：EP12841957.9申请日：20121017公开号：EP2769046A1公开日：20140827
摘要：A drill bit may include a bit body rotatable about a longitudinal axis and having,at one end, a connection for securing the drill bit to a drill string and having a faceopposite the connection end; and a plurality of cutting structures having at least onefixed cutting structure disposed on the bit body face and at least one cutting bodyrotatably attached to the face of the bit body; wherein, in a rotated view of the pluralityof cutting structures into a single plane, there is substantially no radial overlap betweenat least one fixed cutting structure and the at least one cutting body.
申请人：Smith International, Inc.
地址：1310 Rankin Road Houston, TX 77073 US
国籍：US
代理机构：Ford, Michael Frederick
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