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发明名称
Mounting apparatus for dual drill pipe.
摘要
申请公布号
EP0685630(A3)
申请公布日期
1997.04.02
申请号
EP19950104109
申请日期
1995.03.21
申请人
ING. G. KLEMM BOHRTECHNIK GMBH
发明人
WILLMES, ACHIM;ZEPPENFELD, HANS DIETER;WURM, THOMAS
分类号
E21B17/18;E21B19/16;E21B19/20;E21B19/24;(IPC1-7):E21B17/18;E21B19/00
主分类号
E21B17/18
代理机构
代理人
主权项
地址
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