发明名称 |
DRILL TOOL |
摘要 |
A drill tool comprises a drill head and a guide operably connected to the drill head. A tube surrounds the guide. The guide and tube include mutually engageable surfaces for transmitting axial and rotational forces from the guide to the tube. By transmitting rotational forces, it is less likely that the tube will become stuck within the overburden.
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申请公布号 |
CA2018445(A1) |
申请公布日期 |
1990.12.09 |
申请号 |
CA19902018445 |
申请日期 |
1990.06.07 |
申请人 |
SANDVIK AKTIEBOLAG |
发明人 |
JANSSON, KJELL-OVE;LUNDAHL, BJORN |
分类号 |
E21B7/20;E21B10/38;E21B10/40;E21B10/66;E21B21/12;(IPC1-7):E21B10/26 |
主分类号 |
E21B7/20 |
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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