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公开(公告)号:US06695049B2
公开(公告)日:2004-02-24
申请号:US09900930
申请日:2001-07-09
申请人: Hugh D. Ostocke , Gordon G. Shiach , John Quinn
发明人: Hugh D. Ostocke , Gordon G. Shiach , John Quinn
IPC分类号: E21B3400
CPC分类号: E21B34/02
摘要: A valve assembly for hydrocarbon wells comprises a first valve (e.g., a conventional gate valve) and a second valve (e.g., a hydraulically operated, fail safe check valve). The second valve provides an alternative to the pressure barrier conventionally formed by a downhole annulus safety valve. It is installable/retrievable through the first valve using a tool of the type used for installation of surface wellhead VR (valve replacement) plugs.
摘要翻译: 用于烃井的阀组件包括第一阀(例如,常规闸阀)和第二阀(例如液压操作的故障安全止回阀)。 第二阀提供了通常由井下环形安全阀形成的压力屏障的替代方案。 它可以通过使用用于安装表面井口VR(阀更换)塞的类型的工具通过第一阀安装/回收。