发明名称 |
Drill Bit Having Enhanced Stabilization Features |
摘要 |
A drill bit for drilling a borehole in earthen formations comprising a bit body having a bit axis and a bit face. In addition, the drill bit comprises a primary blade extending radially along the bit face, the primary blade including a cutter-supporting surface that defines a blade profile in rotated profile view extending from the bit axis to an outer radius of the bit body. The blade profile is continuously contoured and includes a plurality of concave regions. Further, the drill bit comprises a plurality of cutter elements mounted to the cutter-supporting surface of the primary blade. Each cutter element on the primary blade has a forward-facing cutting face with a cutting edge adapted to penetrate and shear the earthen formation. |
申请公布号 |
US2009145663(A1) |
申请公布日期 |
2009.06.11 |
申请号 |
US20080330633 |
申请日期 |
2008.12.09 |
申请人 |
SMITH INTERNATIONAL, INC. |
发明人 |
DURAIRAJAN BALA;HOFFMASTER CARL M.;ARTEAGA ROLANDO DESCARPONTRIEZ |
分类号 |
E21B10/54;E21B7/00;E21B10/56 |
主分类号 |
E21B10/54 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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