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发明名称
Pressure balanced piston for subsurface safety valves
摘要
申请公布号
GB2468984(B)
申请公布日期
2012.05.02
申请号
GB20100010809
申请日期
2009.01.17
申请人
BAKER HUGHES INCORPORATED
发明人
DARIO CASCIARO;GARY (BEN) B LAKE;STEVE ROSENBLATT
分类号
E21B34/10;E21B34/12
主分类号
E21B34/10
代理机构
代理人
主权项
地址
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