| 发明名称 |
Rotary drill bit having moveable formation-engaging members |
| 摘要 |
Formation engaging elements are moveably mounted onto a drill bit. Such elements may be used to protect other rigidly mounted formation engaging elements from impacts that occur during use of the drill bit, or they may be used to alter the aggressiveness of the drill bit when used in directional drilling operations.
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| 申请公布号 |
US6142250(A) |
申请公布日期 |
2000.11.07 |
| 申请号 |
US19980066160 |
申请日期 |
1998.04.24 |
| 申请人 |
CAMCO INTERNATIONAL (UK) LIMITED |
发明人 |
GRIFFIN, NIGEL DENNIS;FULLER, JOHN MICHAEL;NEWTON, ALEX;TAYLOR, MALCOLM ROY;MURDOCK, ANDREW;TAYLOR, STEVEN |
| 分类号 |
E21B7/06;E21B10/32;E21B10/54;E21B10/56;E21B10/567;E21B10/62;E21B44/00;(IPC1-7):E21B10/62 |
主分类号 |
E21B7/06 |
| 代理机构 |
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