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发明名称
Top Drive Torque Booster
摘要
申请公布号
GB2422163(B)
申请公布日期
2010.05.19
申请号
GB20060001001
申请日期
2006.01.18
申请人
WEATHERFORD/LAMB INC.
发明人
DAVID SHAHIN;KARSTEN HEIDECKE
分类号
E21B19/16
主分类号
E21B19/16
代理机构
代理人
主权项
地址
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