Tool for hydraulically displacing well materials,申请号US19470746038-传众专利搜索

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发明名称	Tool for hydraulically displacing well materials
摘要
申请公布号	US2626177(A)	申请公布日期	1953.01.20
申请号	US19470746038	申请日期	1947.05.05
申请人	GRANT OIL TOOL COMPANY	发明人	MAXWELL WILBER A.;ENGSTRAND JOHN A.
分类号	E21B27/00;E21B31/08	主分类号	E21B27/00
代理机构		代理人
主权项
地址

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