Method and apparatus for recovering lost drill pipe,申请号US19490090936-传众专利搜索

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发明名称	Method and apparatus for recovering lost drill pipe
摘要
申请公布号	US2680483(A)	申请公布日期	1954.06.08
申请号	US19490090936	申请日期	1949.05.02
申请人	LE BUS FRANKLIN L	发明人	BUS FRANKLIN L. LE
分类号	E21B31/14	主分类号	E21B31/14
代理机构		代理人
主权项
地址

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