IMPROVEMENTS IN OR RELATING TO STEERABLE ROTARY DRILLING SYSTEMS,申请号GB19910013713-传众专利搜索

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发明名称	IMPROVEMENTS IN OR RELATING TO STEERABLE ROTARY DRILLING SYSTEMS
摘要
申请公布号	GB9113713(D0)	申请公布日期	1991.08.14
申请号	GB19910013713	申请日期	1991.06.25
申请人	CAMCO DRILLING GROUP LIMITED	发明人
分类号	E21B7/08;E21B44/00;E21B47/022	主分类号	E21B7/08
代理机构		代理人
主权项
地址

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