发明名称 DRILLING SYSTEMS AND HYBRID DRILL BITS FOR DRILLING IN A SUBTERRANEAN FORMATION AND METHODS RELATING THERETO
摘要 Drill bits and methods relating thereto are disclosed. In an embodiment, the drill bit includes a body having a plurality of legs each having a lower section that has a leading surface and a trailing surface. A plurality of cone cutters are each rotatably mounted to the lower section of one of the legs, each having a cone axis, and including a first plurality of cutter elements arranged about the cone axis such that each shears the formation when the body is rotated about the bit axis.
申请公布号 CA2929320(A1) 申请公布日期 2015.06.11
申请号 CA20142929320 申请日期 2014.12.05
申请人 NATIONAL OILWELL DHT, L.P. 发明人 CLAUSEN, JEFFERY RONALD
分类号 E21B10/14;E21B10/20 主分类号 E21B10/14
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