发明名称 |
AXIALLY COMPACT DRILL ROD |
摘要 |
A drill rod comprising a main length and a threaded male spigot coupling projecting axially from a first end of the main length and a threaded female coupling provided at a second end of the main length. The axial length of the male and female threads are maintained to a minimum so as to maximise the drilling length of the rod. |
申请公布号 |
CA2880543(A1) |
申请公布日期 |
2016.07.29 |
申请号 |
CA20152880543 |
申请日期 |
2015.01.29 |
申请人 |
SANDVIK INTELLECTUAL PROPERTY AB |
发明人 |
WEINBERGER, GERHARD |
分类号 |
E21B17/042;E21B17/00;F16L9/02;F16L15/06 |
主分类号 |
E21B17/042 |
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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