Drilling with concentric strings of casing,申请号GB20030029889-传众专利搜索

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发明名称	Drilling with concentric strings of casing
摘要
申请公布号	GB0329889(D0)	申请公布日期	2004.01.28
申请号	GB20030029889	申请日期	2003.12.23
申请人	WEATHERFORD/LAMB INC.	发明人
分类号	E21B7/20;E21B17/07	主分类号	E21B7/20
代理机构		代理人
主权项
地址

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