STEERABLE ROTARY DRILL BIT ASSEMBLY WITH PILOT BIT,申请号EP20020764714-传众专利搜索

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发明名称	STEERABLE ROTARY DRILL BIT ASSEMBLY WITH PILOT BIT
摘要
申请公布号	EP1407110(A1)	申请公布日期	2004.04.14
申请号	EP20020764714	申请日期	2002.07.16
申请人	SHELL INTERNATIONALE RESEARCHMAATSCHAPPIJ B.V.	发明人	RUNIA, DOUWE, JOHANNES;SMITH, DAVID, GEORGE, LIVESEY;WORRALL, ROBERT, NICHOLAS
分类号	E21B7/06;E21B10/26;E21B10/62;E21B17/04;(IPC1-7):E21B10/26	主分类号	E21B7/06
代理机构		代理人
主权项
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