Surface controlled annulus safety system for well bores,申请号GB19930014900-传众专利搜索

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发明名称	Surface controlled annulus safety system for well bores
摘要
申请公布号	GB2269413(B)	申请公布日期	1996.04.17
申请号	GB19930014900	申请日期	1993.07.19
申请人	* OTIS ENGINEERING CORPORATION;* HALLIBURTON COMPANY	发明人	CRAIG D * HINES;RENNIE L. * DICKSON
分类号	E21B34/10;(IPC1-7):E21B34/10	主分类号	E21B34/10
代理机构		代理人
主权项
地址

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