Roller cone drill bits with enhanced drilling stability and extended life of associated bearings and seals,申请号GB20050003934-传众专利搜索

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发明名称	Roller cone drill bits with enhanced drilling stability and extended life of associated bearings and seals
摘要
申请公布号	GB0503934(D0)	申请公布日期	2005.04.06
申请号	GB20050003934	申请日期	2005.02.25
申请人	HALLIBURTON ENERGY SERVICES, INC.	发明人
分类号	E21B10/16;E21B41/00	主分类号	E21B10/16
代理机构		代理人
主权项
地址

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