DRILL BIT HAVING ADJUSTABLE TOTAL FLOW AREA,申请号CA20022392937-传众专利搜索

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发明名称	DRILL BIT HAVING ADJUSTABLE TOTAL FLOW AREA
摘要
申请公布号	CA2392937(A1)	申请公布日期	2003.01.11
申请号	CA20022392937	申请日期	2002.07.10
申请人	SMITH INTERNATIONAL, INC.	发明人	KRISTIANSEN, STEFFEN S.;AZAR, MICHAEL G.;ZHANG, JOHN YOUHE
分类号	E21B10/60;E21B10/61;E21B21/10;(IPC1-7):E21B10/18;E21B10/38	主分类号	E21B10/60
代理机构		代理人
主权项
地址

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