发明名称 |
DRILLING APPARATUS AND METHOD |
摘要 |
TITLE: DRILLING APPARATUS AND METHOD Drilling apparatus comprises a drill string having coiled tubing (10) which extends down a bore being drilled and which is uncoiled as drilling progresses. A leading end of the drill string carries a drilling motor (28) having a body (26) and a bit (32) rotatably driven with respect to the body (26). The bit (32) and the body (26) are out of alignment by a bend angle (38). A multi-plate brake (42) activated by a piston (44) controls relative rotation between the motor body (26) and the coiled tubing (10) in order to control drilling course.
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申请公布号 |
CA2130736(A1) |
申请公布日期 |
1995.03.04 |
申请号 |
CA19942130736 |
申请日期 |
1994.08.23 |
申请人 |
CAMBRIDGE DRILLING AUTOMATION LIMITED |
发明人 |
ALLEN, PETER |
分类号 |
E21B7/06;E21B7/08;(IPC1-7):E21B7/04 |
主分类号 |
E21B7/06 |
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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