发明名称 |
Energy transmission efficient drill string coupling |
摘要 |
A drill string and a threaded coupling region for a drill string in which a threaded male and female end are optimised to maximise energy transmission efficiency for percussion drilling. The present coupling comprises a male spigot to be received within a female sleeve such that an axial length of the overlap of the spigot within the sleeve is less than an outside diameter of the sleeve. |
申请公布号 |
AU2014317321(A1) |
申请公布日期 |
2016.03.10 |
申请号 |
AU20140317321 |
申请日期 |
2014.08.25 |
申请人 |
SANDVIK INTELLECTUAL PROPERTY AB |
发明人 |
ROSEN, JONAS;JANSSON, TOMAS SH |
分类号 |
E21B17/042 |
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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