Dual concentric string high pressure riser,申请号GB19960013440-传众专利搜索

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发明名称	Dual concentric string high pressure riser
摘要
申请公布号	GB9613440(D0)	申请公布日期	1996.08.28
申请号	GB19960013440	申请日期	1994.12.20
申请人	SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V.	发明人
分类号	E21B7/128;E21B17/01	主分类号	E21B7/128
代理机构		代理人
主权项
地址

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