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发明名称
Rotating control device apparatus and method
摘要
申请公布号
GB2443561(B)
申请公布日期
2009.05.06
申请号
GB20070021759
申请日期
2007.11.06
申请人
SMITH INTERNATIONAL INC
发明人
JAMES MAY;JAYE SHELTON
分类号
E21B33/08;E21B17/01
主分类号
E21B33/08
代理机构
代理人
主权项
地址
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