Drilling apparatus and downhole torque generator,申请号EP19980101099-传众专利搜索

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发明名称	Drilling apparatus and downhole torque generator
摘要
申请公布号	EP0855490(A3)	申请公布日期	2000.03.29
申请号	EP19980101099	申请日期	1998.01.22
申请人	BAUER SPEZIALTIEFBAU GMBH	发明人	STOETZER, ERWIN, DIPL.-ING. WIRTSCH.-ING.;HAGEMEYER, CARL, DR.-ING.
分类号	E21B3/00;E21B7/00;E21B10/26;E21B17/10;E21B21/00;E21D1/06;E21D9/13;(IPC1-7):E21B21/00;E21B41/00	主分类号	E21B3/00
代理机构		代理人
主权项
地址

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