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    Fail-safe safety cut-off valve for a fluid well
    81.
    发明授权
    Fail-safe safety cut-off valve for a fluid well 失效
    用于流体井的故障安全安全截止阀

    公开(公告)号：US4002202A

    公开(公告)日：1977-01-11

    申请号：US616189

    申请日：1975-09-24

    申请人： Donald L. Huebsch ,  Louis B. Paulos

    发明人： Donald L. Huebsch ,  Louis B. Paulos

    IPC分类号： E21B31/03 ,  E21B34/00 ,  E21B34/06 ,  E21B43/00 ,  F16K17/34 ,  F16K31/06

    CPC分类号： E21B34/066 ,  E21B31/03 ,  E21B2034/002 ,  E21B2034/005 ,  Y10T137/7785 ,  Y10T137/7875

    摘要： A fail-safe sub-surface safety cut-off valve for fluid wells controllable from the surface and suitable for installation at substantially greater depths than prior constructions. The valve assembly is installable and retrievable via wire line technique and utilizes an electromagnetic means to operate either a flapper or a ball cut-off valve. The operating solenoid coil embraces a landing nipple portion of the tubing string and is outside the production flow. This solenoid supplies the power to open either type of cut-off valve and holds the latter open only so long as the solenoid is energized thereby providing surface control of the safety cut-off valve normally and assurance of closing of this valve in the event of power failure through accident or some catastrophe as well as automatic closure if flow velocity increases beyond a predetermined safe value.

    摘要翻译： 用于流体井的故障安全子表面安全截止阀，可从表面控制，适用于比现有结构大得多的深度安装。 阀组件可通过线路技术安装和回收，并利用电磁装置操作挡板或球截止阀。 操作螺线管线圈包围管柱的着陆接头部分并且在生产流程之外。 该螺线管供电，以打开任一类型的截止阀，并且仅在螺线管通电时将其打开，从而提供正常的安全截止阀的表面控制，并确保在该情况下关闭该阀 通过事故或某些灾难发生电力故障，以及如果流速超过预定安全值，则自动关闭。