A drag-type Rotary Drill Bit,申请号EP19990309665-传众专利搜索

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发明名称	A drag-type Rotary Drill Bit
摘要
申请公布号	EP1006257(B1)	申请公布日期	2004.02.25
申请号	EP19990309665	申请日期	1999.12.01
申请人	CAMCO INTERNATIONAL (UK) LTD.	发明人	CARAWAY, DOUGLAS;MACMILLAN, ROBIN
分类号	E21B10/42;E21B10/54;(IPC1-7):E21B10/46	主分类号	E21B10/42
代理机构		代理人
主权项
地址

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