Flexible Drill String and Operating Apparatus therefor,申请号GB19680048787-传众专利搜索

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发明名称	Flexible Drill String and Operating Apparatus therefor
摘要
申请公布号	GB1184970(A)	申请公布日期	1970.03.18
申请号	GB19680048787	申请日期	1968.10.15
申请人	NORTHROP CORPORATION	发明人	SHELDON OSCAR BRESIN;DONALD EDWARD ROSS
分类号	E21B17/20;E21B19/22	主分类号	E21B17/20
代理机构		代理人
主权项
地址

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