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发明名称
VERFAHREN ZUR ERHÖHUNG DER PRODUKTION EINES BOHRLOCHES
摘要
申请公布号
AT438785(T)
申请公布日期
2009.08.15
申请号
AT20030707764T
申请日期
2003.02.06
申请人
WEATHERFORD/LAMB, INC.
发明人
PIA, GIANCARLO
分类号
E21B43/25;E21B7/28;E21B21/00
主分类号
E21B43/25
代理机构
代理人
主权项
地址
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