发明名称 |
Telescopable boring rod mechanism |
摘要 |
The invention relates to a telescopable boring rod mechanism with at least two mutually displaceable Kelly rods, which are equipped with means for transmitting a torque to the adjacent Kelly rod. At least one of the Kelly rods is constructed from at least two rod segments, which are made from a different material.
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申请公布号 |
US2004216928(A1) |
申请公布日期 |
2004.11.04 |
申请号 |
US20040773449 |
申请日期 |
2004.02.09 |
申请人 |
BAUER SEBASTIAN;WEIXLER LEONHARD |
发明人 |
BAUER SEBASTIAN;WEIXLER LEONHARD |
分类号 |
E21B17/00;E21B17/07;(IPC1-7):E21B17/07 |
主分类号 |
E21B17/00 |
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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