METHOD OF DRILLING A BOREHOLE,AND A DRILL COUPLING FOR USE IN THAT METHOD,申请号GB19920017661-传众专利搜索

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发明名称	METHOD OF DRILLING A BOREHOLE,AND A DRILL COUPLING FOR USE IN THAT METHOD
摘要
申请公布号	GB2258877(A)	申请公布日期	1993.02.24
申请号	GB19920017661	申请日期	1992.08.20
申请人	ALAN GERARD * VASEY	发明人	ALAN GERARD * VASEY
分类号	E21B7/06;E21B7/08;E21B17/05	主分类号	E21B7/06
代理机构		代理人
主权项
地址

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