DRILLING TOOLS HAVING A HIGH CLEANING EFFICIENCY AT THE WORK SURFACE,申请号EP19850401183-传众专利搜索

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发明名称	DRILLING TOOLS HAVING A HIGH CLEANING EFFICIENCY AT THE WORK SURFACE
摘要
申请公布号	EP0170548(B1)	申请公布日期	1989.04.19
申请号	EP19850401183	申请日期	1985.06.14
申请人	INSTITUT FRANCAIS DU PETROLE	发明人	BARDIN, CHRISTIAN;CHOLET, HENRI
分类号	E21B10/60;E21B10/61	主分类号	E21B10/60
代理机构		代理人
主权项
地址

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