发明名称 |
METHOD OF AND APPARATUS FOR DIRECTIONAL DRILLING |
摘要 |
A method of and system for directional drilling reduces the friction between the drill string and the well bore. A downhole drilling motor is connected to the surface by a drill string. The drilling motor is oriented at a selected tool face angle. The drill string is rotated at said surface location in a first direction until a first torque magnitude without changing the tool face angle. The drill string is then rotated in the opposite direction until a second torque magnitude is reached, again without changing the tool face angle. The drill string is rocked back and forth between the first and second torque magnitudes. |
申请公布号 |
CA2509347(C) |
申请公布日期 |
2008.04.08 |
申请号 |
CA20032509347 |
申请日期 |
2003.10.15 |
申请人 |
NOBLE ENGINEERING AND DEVELOPMENT, LTD. |
发明人 |
MAIDLA, ERIC E.;HACI, MARC |
分类号 |
E21B44/04;E21B7/06;E21B44/00 |
主分类号 |
E21B44/04 |
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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