发明名称 |
METHOD AND SYSTEM FOR DIRECTIONAL DRILLING AND COUPLING SUB |
摘要 |
The present invention provides a system and method for directional drilling of a borehole in a formation along a predetermined trajectory. The method comprising the steps of: providing a directional drilling system, comprising a rotatable drill string comprising a first drill string section and a second drill string section; a drill bit connected to a downhole end of the drill string; and a coupling sub comprising a first end connected to the first drill string section; a second end connected to the second drill string section; a hinge member between the first end and the second end allowing hinging of the second end relative to the first end; and locking means, operable between a hinge mode and a locking mode for locking the hinge member to prevent hinging of the second end relative to the first end; operating the directional drilling system with the locking means in the locking mode to drill a substantially straight section of the trajectory; and operating the directional drilling system with the locking means in the hinge mode to drill a curved section of the trajectory. |
申请公布号 |
WO2013186342(A1) |
申请公布日期 |
2013.12.19 |
申请号 |
WO2013EP62338 |
申请日期 |
2013.06.14 |
申请人 |
SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V.;SHELL OIL COMPANY |
发明人 |
VAN NIEUWKOOP, PIETER |
分类号 |
E21B7/18;E21B7/06;E21B17/04;E21B17/043 |
主分类号 |
E21B7/18 |
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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