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发明名称
VORRICHTUNG UND VERFAHREN ZUM VERBINDEN VON BOHRLOCHROHREN UNTER VERWENDUNG EINES KOPFANTRIEBES
摘要
申请公布号
DE69915841(D1)
申请公布日期
2004.04.29
申请号
DE1999615841
申请日期
1999.08.16
申请人
WEATHERFORD/LAMB, INC.
发明人
PIETRAS, BERND-GEORG
分类号
E21B19/06;E21B19/16;(IPC1-7):E21B19/16
主分类号
E21B19/06
代理机构
代理人
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