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发明名称
DOWN-HOLE MOTOR AND METHOD FOR DIRECTIONAL DRILLING OF BOREHOLES
摘要
申请公布号
EP0103913(B1)
申请公布日期
1986.10.15
申请号
EP19830201032
申请日期
1983.07.12
申请人
SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V.
发明人
KAMP, ANTHONY WILLEM;FEENSTRA, ROBIJN
分类号
E21B4/02;E21B4/20;E21B7/06;(IPC1-7):E21B7/06
主分类号
E21B4/02
代理机构
代理人
主权项
地址
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