Oil well tool guide,申请号US19510206992-传众专利搜索

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发明名称	Oil well tool guide
摘要
申请公布号	US2710654(A)	申请公布日期	1955.06.14
申请号	US19510206992	申请日期	1951.01.20
申请人	SHELL DEVELOPMENT COMPANY	发明人	CLAYTON MAX L.
分类号	E21B31/00	主分类号	E21B31/00
代理机构		代理人
主权项
地址

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