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发明名称
Vorrichtung und Verfahren zum Abschrauben eines rohrförmigen Elements im Bohrloch
摘要
申请公布号
DE602004010200(T2)
申请公布日期
2008.09.25
申请号
DE200460010200T
申请日期
2004.06.18
申请人
WEATHERFORD/LAMB INC.
发明人
ROBERTS, JOHN
分类号
E21B17/02;E21B31/00
主分类号
E21B17/02
代理机构
代理人
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地址
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