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发明名称
VALVE FOR USE IN A WELLBORE
摘要
申请公布号
EP0986690(B1)
申请公布日期
2003.02.26
申请号
EP19980925795
申请日期
1998.06.04
申请人
WEATHERFORD/LAMB, INC.
发明人
BUDDE, PETER
分类号
E21B21/10;(IPC1-7):E21B21/10;F16K25/00;F16K1/38
主分类号
E21B21/10
代理机构
代理人
主权项
地址
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