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发明名称
STEERABLE ROTARY DRILL BIT ASSEMBLY WITH PILOT BIT
摘要
申请公布号
EP1407110(B1)
申请公布日期
2005.09.21
申请号
EP20020764714
申请日期
2002.07.16
申请人
SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ 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
地址
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