Retrievable bridge plug,申请号US19490089527-传众专利搜索

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发明名称	Retrievable bridge plug
摘要
申请公布号	US2568944(A)	申请公布日期	1951.09.25
申请号	US19490089527	申请日期	1949.04.25
申请人	WESTERN GULF OIL COMPANY	发明人	BRIGHAM HARRY S.
分类号	E21B33/127	主分类号	E21B33/127
代理机构		代理人
主权项
地址

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