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发明名称
Bidirectional sealing mechanically shifted ball valve for downhole use
摘要
申请公布号
GB2480397(B)
申请公布日期
2013.02.20
申请号
GB20110012654
申请日期
2010.01.22
申请人
BAKER HUGHES INCORPORATED
发明人
CLIFFORD H. BEALL;JAMES T SLOAN;RICHARD PATTERSON
分类号
E21B34/14
主分类号
E21B34/14
代理机构
代理人
主权项
地址
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