发明名称 |
GUIDED DRILLING SYSTEM WITH SHOCK ABSORBER |
摘要 |
There is provided a guided drilling system and an in-the-hole shock absorber adapted thereto. The guided drilling system includes a drill string configured to continuously and accurately bore a hole in the ground without the need to periodically break the connection of the drill string. In order to protect the components of the drilling system a hollow core shock absorber for percussive drill strings has been designed. A centrally disposed coil spring transmits the necessary thrust to a percussive hammer while providing a resilient cushion for vibration displacement Pressurized fluid flows through the center of the shock absorber through a poppet valve.
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申请公布号 |
CA2203736(A1) |
申请公布日期 |
1997.10.29 |
申请号 |
CA19972203736 |
申请日期 |
1997.04.25 |
申请人 |
INCO LIMITED |
发明人 |
YOUNG, DONALD D.;BAIDEN, GREGORY R.;DEVLUGT, PAUL;VAN BERKEL, LAMBERTUS H.;HOOVER, DAVID L. |
分类号 |
E21B1/36;E21B1/00;E21B3/00;E21B4/14;E21B6/02;E21B7/02;E21B15/00;E21B17/07;E21B19/22;E21B19/24;F16F7/00;(IPC1-7):E21B7/02;E21B6/00;E21C11/02 |
主分类号 |
E21B1/36 |
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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