Valve assembly for hydrocarbon wells
    1.
    发明授权
    Valve assembly for hydrocarbon wells 失效
    用于油气井的阀组件

    公开(公告)号:US06695049B2

    公开(公告)日:2004-02-24

    申请号:US09900930

    申请日:2001-07-09

    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。