发明名称 |
Stabilizer for use in a drill string |
摘要 |
A stabilizer especially adapted for use with an drill string having an eccentric drilling element, such as a bi-center bit. The stabilizer has a pair of circumferentially displaced blades that lie in a common circumferential plane and extend from a rotatable sleeve supported on the stabilizer body, as well as a stationary blade. The rotating blades are aligned with the stationary blade when in a first circumferential orientation and are disposed so that the mid-point between the rotating blades is located opposite the stationary blade, thereby providing full-gauge stabilization, when the rotating blades are in a second circumferential orientation. A magnetic systems senses the circumferential orientation of the rotating blades and transmits the information to the surface via mud pulse telemetry. A piston actuated by the drilling mud locks the rotating blades into the active and inactive positions. A brake shoe located on the distal end of each rotating blade provides contact with the walls of the bore hole and serves as a support pad for a formation sensor.
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申请公布号 |
US2002056574(A1) |
申请公布日期 |
2002.05.16 |
申请号 |
US20010896020 |
申请日期 |
2001.06.29 |
申请人 |
HARVEY PETER R.;WOODS MICHAEL J.;KRASE STEVE J.;BURGESS DANIEL E.;WASSELL MARK ELLSWORTH |
发明人 |
HARVEY PETER R.;WOODS MICHAEL J.;KRASE STEVE J.;BURGESS DANIEL E.;WASSELL MARK ELLSWORTH |
分类号 |
E21B7/08;E21B17/10;E21B23/04;E21B47/01;(IPC1-7):E21B17/00 |
主分类号 |
E21B7/08 |
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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