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 |
WO2015032642(A2) |
申请公布日期 |
2015.03.12 |
申请号 |
WO2014EP67979 |
申请日期 |
2014.08.25 |
申请人 |
SANDVIK INTELLECTUAL PROPERTY AB |
发明人 |
ROSÈN, JONAS;JANSSON, TOMAS SH |
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