LOCK OPEN MECHANISM FOR DOWNHOLE SAFETY VALVE,申请号GB19900025872-传众专利搜索

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发明名称	LOCK OPEN MECHANISM FOR DOWNHOLE SAFETY VALVE
摘要
申请公布号	GB2239474(A)	申请公布日期	1991.07.03
申请号	GB19900025872	申请日期	1990.11.28
申请人	* BAKER HUGHES INCORPORATED	发明人	STEVEN H * SHIRK
分类号	E21B34/06;E21B34/14	主分类号	E21B34/06
代理机构		代理人
主权项
地址

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