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经营范围
发明名称
Downhole valve actuation
摘要
申请公布号
GB2316425(A)
申请公布日期
1998.02.25
申请号
GB19970017214
申请日期
1997.08.14
申请人
* KVAERNER OIL & GAS LIMITED
发明人
VERNON EDWARD * MARKS;BERNARD CHARLES EGBERT * PAZZARD
分类号
E21B34/10;E21B41/02;(IPC1-7):E21B34/10;E21B34/16
主分类号
E21B34/10
代理机构
代理人
主权项
地址
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