Hydraulic underreamer and sections for use therein,申请号GB20010021889-传众专利搜索

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发明名称	Hydraulic underreamer and sections for use therein
摘要
申请公布号	GB0121889(D0)	申请公布日期	2001.10.31
申请号	GB20010021889	申请日期	2000.02.02
申请人	PHILIPS PETROLEUM COMPANY	发明人
分类号	E21B7/18;E21B7/28;E21B17/10;E21B21/12	主分类号	E21B7/18
代理机构		代理人
主权项
地址

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