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发明名称
Integrated directional under-reamer and stabilizer
摘要
申请公布号
GB9723290(D0)
申请公布日期
1998.01.07
申请号
GB19970023290
申请日期
1997.11.04
申请人
BAKER HUGHES INCORPORATED
发明人
分类号
E21B10/32;E21B10/34;E21B17/10
主分类号
E21B10/32
代理机构
代理人
主权项
地址
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