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发明名称
PORTABLE TOP DRIVE
摘要
申请公布号
EP0777810(A1)
申请公布日期
1997.06.11
申请号
EP19950933579
申请日期
1995.09.13
申请人
NABORS INDUSTRIES, INC. RICHARDSON, ALLAN S.;HOPE ROBERT L
发明人
RICHARDSON, ALLAN S.;HOPE, ROBERT L.
分类号
E21B3/02;E21B15/00;(IPC1-7):E21B3/02
主分类号
E21B3/02
代理机构
代理人
主权项
地址
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