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发明名称
Downhole material retention apparatus
摘要
申请公布号
GB2486598(B)
申请公布日期
2012.07.25
申请号
GB20120002570
申请日期
2009.04.14
申请人
BAKER HUGHES INCORPORATED
发明人
GERALD D LYNDE;JOHN P DAVIS
分类号
E21B27/00;E21B21/00;E21B29/00
主分类号
E21B27/00
代理机构
代理人
主权项
地址
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