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发明名称
METHOD AND APPARATUS FOR DRILLING A WELL BORE
摘要
申请公布号
EP0073610(A3)
申请公布日期
1983.09.14
申请号
EP19820304383
申请日期
1982.08.19
申请人
ANDERS, EDWARD O.
发明人
ANDERS, EDWARD O.
分类号
E21B7/04;E21B7/06;E21B7/08;E21B17/07;E21B17/10;E21B31/00;E21B41/00;E21B43/30;E21B44/00;(IPC1-7):E21B7/04
主分类号
E21B7/04
代理机构
代理人
主权项
地址
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