Free point indicator for determining the point at which stuck pipe is free in a well,申请号US19570656478-传众专利搜索

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发明名称	Free point indicator for determining the point at which stuck pipe is free in a well
摘要
申请公布号	US3006186(A)	申请公布日期	1961.10.31
申请号	US19570656478	申请日期	1957.04.29
申请人	THE DIA-LOG TUBULAR SURVEY COMPANY	发明人	BERRY THEODORE L.
分类号	E21B47/09	主分类号	E21B47/09
代理机构		代理人
主权项
地址

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