Downhole drill for submarine drilling,申请号US19660531584-传众专利搜索

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发明名称	Downhole drill for submarine drilling
摘要
申请公布号	US3382934(A)	申请公布日期	1968.05.14
申请号	US19660531584	申请日期	1966.03.03
申请人	INGERSOLL-RAND COMPANY	发明人	SPEAR RICHARD W.
分类号	E21B7/20;E21B10/64	主分类号	E21B7/20
代理机构		代理人
主权项
地址

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