发明名称 |
DRILL HEAD STEERING |
摘要 |
A method of steering a fluid drilling head in an underground borehole drilling situation is provided by rotating the flexible hose through which high pressure is provided to the drilling head and providing a biasing force on the drilling head. The hose can be rotated from a remote surface mounted situation by rotating the entire surface rig (13) in a horizontal plane about a turntable (24) causing the vertically orientated portion of the hose (11) to rotate about its longitudinal axis. The biasing force can be provided in a number of different ways but typically results from the use of an asymmetrical gauging ring on the fluid drilling head. |
申请公布号 |
EA007514(B1) |
申请公布日期 |
2006.10.27 |
申请号 |
EA20050000681 |
申请日期 |
2003.10.20 |
申请人 |
CMTE DEVELOPMENT LIMITED |
发明人 |
ADAM SCOTT, CHRISTOPHER;MEYER TIMOTHY, GREGORY, HAMILTON |
分类号 |
E21B7/18;E21B7/04;E21B7/06;E21B15/04;E21B21/02;E21F7/00 |
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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