A drilling assembly for use in drilling holes in subsurface formations,申请号GB19950021944-传众专利搜索

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发明名称	A drilling assembly for use in drilling holes in subsurface formations
摘要
申请公布号	GB9521944(D0)	申请公布日期	1996.01.03
申请号	GB19950021944	申请日期	1995.10.26
申请人	CAMCO DRILLING GROUP LIMITED	发明人
分类号	E21B4/16;E21B4/20;E21B10/26	主分类号	E21B4/16
代理机构		代理人
主权项
地址

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