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经营范围
发明名称
WELL SYSTEM
摘要
申请公布号
GB2088436(B)
申请公布日期
1984.12.19
申请号
GB19810024550
申请日期
1981.08.11
申请人
OTIS ENGINEERING CORP
发明人
分类号
E21B23/02;E21B23/08;E21B34/00;E21B34/14;E21B43/14;(IPC1-7):E21B34/14
主分类号
E21B23/02
代理机构
代理人
主权项
地址
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