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发明名称
HYDRODYNAMIC PUMP PASSAGES FOR ROLLING CONE DRILL BIT
摘要
申请公布号
EP1718838(B1)
申请公布日期
2009.04.15
申请号
EP20050713212
申请日期
2005.02.10
申请人
BAKER HUGHES INCORPORATED
发明人
DICK, AARON, J.;LIN, CHIH, C.
分类号
E21B10/24
主分类号
E21B10/24
代理机构
代理人
主权项
地址
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