Perforation cleaner for oil wells,申请号US19400317553-传众专利搜索

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发明名称	Perforation cleaner for oil wells
摘要
申请公布号	US2224412(A)	申请公布日期	1940.12.10
申请号	US19400317553	申请日期	1940.02.06
申请人	SMITH SAMUEL V	发明人	SMITH SAMUEL V.
分类号	E21B37/08	主分类号	E21B37/08
代理机构		代理人
主权项
地址

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