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经营范围
发明名称
Improvements in or relating to downhole tools
摘要
申请公布号
GB9724194(D0)
申请公布日期
1998.01.14
申请号
GB19970024194
申请日期
1997.11.15
申请人
BRUNEL OILFIELD SERVICES (UK) LIMITED
发明人
CHARLTON STEPHEN
分类号
E21B17/10
主分类号
E21B17/10
代理机构
代理人
主权项
地址
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