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发明名称
A DRILLING TOOL
摘要
申请公布号
EP1086292(B1)
申请公布日期
2004.04.14
申请号
EP19990955516
申请日期
1999.06.09
申请人
WEATHERFORD/LAMB INC
发明人
WARDLEY, MICHAEL
分类号
E21B7/20;E21B10/62;E21B17/14;E21B21/10;(IPC1-7):E21B7/20
主分类号
E21B7/20
代理机构
代理人
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