DRILL BIT ASSEMBLY WITH FLUID SEPARATOR,申请号EP19830306327-传众专利搜索

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发明名称	DRILL BIT ASSEMBLY WITH FLUID SEPARATOR
摘要
申请公布号	EP0107475(B1)	申请公布日期	1988.12.28
申请号	EP19830306327	申请日期	1983.10.18
申请人	DRUMCO	发明人	DRUMMOND, DONALD DAVID;WOOD, ROY WILBERT;JOHNSEY, WALTER FRANK
分类号	E21B10/24;E21B10/18;E21B10/23;E21B21/00;E21B21/16;(IPC1-7):E21B21/00	主分类号	E21B10/24
代理机构		代理人
主权项
地址

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