发明名称 |
METHOD AND DEVICE FOR DRIVING BORE HOLES, SPECIALLY EXPLORING AND EXTRACTION DRILLINGS IN THE SEA BOTTOM |
摘要 |
Method of, and apparatus for, sinking bore holes, in particular exploratory and extraction bore holes, in the sea bed (40). The material from the sea bed is loosened with the aid of a rotating drill head (10) which is arranged at the bottom end of a drill string (5) which is suitable for transmitting a torque. The top end of the drill string is mounted on a floating platform (1), it being the case that the drill string (5) comprises at least two telescopically interengaging drill-string parts (6, 7) which, during a vertical movement of the platform, induced for example by the sea swell, execute a movement relative to one another, with the result that the drill head (10) rests with an essentially constant force on the surface which is to be cleared away. |
申请公布号 |
WO9826151(A3) |
申请公布日期 |
1998.10.01 |
申请号 |
WO1997DE02770 |
申请日期 |
1997.11.27 |
申请人 |
WIRTH MASCHINEN- UND BOHRGERAETE-FABRIK GMBH;TIBUSSEK, FRITZ;VON WIRTH, HERMANN-JOSEF |
发明人 |
TIBUSSEK, FRITZ;VON WIRTH, HERMANN-JOSEF |
分类号 |
E21B7/124;E21B7/128;E21B17/07;E21B19/08;E21B19/09;E21B21/00;E21B21/14;E21B43/29 |
主分类号 |
E21B7/124 |
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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