发明名称 |
THREADED COUPLING END FOR DRILL STRING COMPONENT |
摘要 |
A threaded coupling for a drill string component having a body on which is formed a thread. A reduction in stress concentrations and a resistance to bending moments are achieved at the thread by reducing a thread depth at at least one axial end of the thread and by adapting an endmost flank of a crest or root of the thread at an endmost helical turn (504). |
申请公布号 |
EP3095955(A1) |
申请公布日期 |
2016.11.23 |
申请号 |
EP20150168925 |
申请日期 |
2015.05.22 |
申请人 |
SANDVIK INTELLECTUAL PROPERTY AB |
发明人 |
WICKSTRÖM, DAVID;NORMAN, ANDREAS |
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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