Bi-directional and internal pressure trapping packing element system,申请号GB20030026015-传众专利搜索

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发明名称	Bi-directional and internal pressure trapping packing element system
摘要
申请公布号	GB2392697(B)	申请公布日期	2006.07.12
申请号	GB20030026015	申请日期	2002.12.10
申请人	WEATHERFORD/LAMB INC	发明人	GERALD DEAN PEDERSEN;DAVID E HIRTH;TARALD GUDMESTAD
分类号	E21B33/128	主分类号	E21B33/128
代理机构		代理人
主权项
地址

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