A modulated bias unit for rotary drilling,申请号GB19950011058-传众专利搜索

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发明名称	A modulated bias unit for rotary drilling
摘要
申请公布号	GB9511058(D0)	申请公布日期	1995.07.26
申请号	GB19950011058	申请日期	1995.06.01
申请人	CAMCO DRILLING GROUP LIMITED	发明人
分类号	E21B4/00;E21B7/04;E21B7/06;E21B7/08;E21B17/10	主分类号	E21B4/00
代理机构		代理人
主权项
地址

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