Control valve assembly for downhole tool,申请号GB19790002195-传众专利搜索

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发明名称	Control valve assembly for downhole tool
摘要
申请公布号	GB2040342(A)	申请公布日期	1980.08.28
申请号	GB19790002195	申请日期	1980.01.23
申请人	HALLIBURTON CO	发明人
分类号	E21B33/127;(IPC1-7):E21B33/12	主分类号	E21B33/127
代理机构		代理人
主权项
地址

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