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发明名称
Downhole drilling system
摘要
申请公布号
GB2454907(B)
申请公布日期
2011.11.30
申请号
GB20070022930
申请日期
2007.11.23
申请人
SCHLUMBERGER HOLDINGS LIMITED
发明人
ERIC LAVRUT
分类号
E21B4/00;E21B7/06
主分类号
E21B4/00
代理机构
代理人
主权项
地址
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