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公开(公告)号:WO2015026452A1
公开(公告)日:2015-02-26
申请号:PCT/US2014/046460
申请日:2014-07-14
Applicant: VAREL INTERNATIONAL IND., L.P.
Inventor: NOBILE, Kyle , STROEVER, Matt , HARRINGTON, David, Michel , ROSE, Karl, W.
CPC classification number: E21B10/52 , E21B10/08 , E21B10/16 , E21B29/00 , E21B29/002 , E21B33/1204
Abstract: A hybrid rotary cone drill bit includes a plurality of legs. A bearing shaft extends from each leg, and a rotary cone is rotationally coupled to each bearing shaft. At least one rotary cone includes a nose row of cutting structures, an inner row of cutting structures, and a gage row of cutting structures. The nose row and the inner row of cutting structures are formed of milled teeth. The gage row of cutting structures is formed of cutter inserts.
Abstract translation: 混合式旋转锥形钻头包括多个支腿。 轴承轴从每个支腿延伸,并且旋转锥体旋转地联接到每个轴承轴。 至少一个旋转锥体包括一排切割结构,一排切割结构,以及一排切割结构。 前排和内排的切割结构由磨牙形成。 切割结构的计量排由切削刀片形成。