发明名称 |
Clutch for a Jack Element |
摘要 |
A downhole tool string, comprising a tool string bore and a drill bit located at the bottom of the tool string. The drill bit comprises a body intermediate a shank and a working surface. The working surface may comprise a substantially coaxial rotationally isolated jack element with a portion of the jack element extending out of an opening formed in the working surface to engage a subterranean formation. The tool string may comprise a driving mechanism adapted to rotate the jack. The clutch assembly disposed within the tool string bore may comprise a first end in communication with the jack element and second end in communication with the driving mechanism.
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申请公布号 |
US2008296015(A1) |
申请公布日期 |
2008.12.04 |
申请号 |
US20070757928 |
申请日期 |
2007.06.04 |
申请人 |
HALL DAVID R;LUNDGREN DAVID |
发明人 |
HALL DAVID R.;LUNDGREN DAVID |
分类号 |
E21B23/00 |
主分类号 |
E21B23/00 |
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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