WELL TOOL WITH SELECTIVE BYPASS FUNCTIONS,申请号EP19850306491-传众专利搜索

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发明名称	WELL TOOL WITH SELECTIVE BYPASS FUNCTIONS
摘要
申请公布号	EP0175553(B1)	申请公布日期	1991.08.07
申请号	EP19850306491	申请日期	1985.09.12
申请人	HALLIBURTON COMPANY	发明人	BARRINGTON, BURCHUS Q.
分类号	E21B34/00;E21B34/12;E21B49/08	主分类号	E21B34/00
代理机构		代理人
主权项
地址

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