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发明名称
Method of operating safety valve by using two control lines having common port
摘要
申请公布号
GB2461432(A)
申请公布日期
2010.01.06
申请号
GB20090017053
申请日期
2009.09.29
申请人
WEATHERFORD/LAMB, INC
发明人
RODDY S SMITH;RICHARD C JONES;STUART M DENNISTOUN
分类号
E21B34/10
主分类号
E21B34/10
代理机构
代理人
主权项
地址
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