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发明名称
Verktoy og fremgangsmate for avlevering av en skrapeplugg nede i et borehull
摘要
申请公布号
NO317685(B1)
申请公布日期
2004.12.06
申请号
NO19990005341
申请日期
1999.11.02
申请人
BAKER HUGHES INC
发明人
SMITH JR SIDNEY K
分类号
E21B33/16;(IPC1-7):E21B33/16
主分类号
E21B33/16
代理机构
代理人
主权项
地址
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