发明名称 |
Jack element in communication with an electric motor and or generator |
摘要 |
A drill bit has a body intermediate a shank and a working face and has an axis of rotation. The working face has at least one cutting element and the body has at least a portion of a jack assembly. The jack assembly has at least a portion of a shaft disposed within a cavity formed in the body of the drill bit, the shaft having a distal end extending from an opening of the cavity formed in the working face. The jack assembly also has an electric motor and/or generator.
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申请公布号 |
US7484576(B2) |
申请公布日期 |
2009.02.03 |
申请号 |
US20070673872 |
申请日期 |
2007.02.12 |
申请人 |
HALL DAVID R;WILDE TYSON J;MISKIN BEN |
发明人 |
HALL DAVID R.;WILDE TYSON J.;MISKIN BEN |
分类号 |
E21B7/04;E21B10/00 |
主分类号 |
E21B7/04 |
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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