Fire activated, fail safe, gate valve bonnet
    1.
    发明授权
    Fire activated, fail safe, gate valve bonnet 有权
    火灾激活,故障安全,闸阀阀盖

    公开(公告)号:US06227226B1

    公开(公告)日:2001-05-08

    申请号:US09538595

    申请日:2000-03-24

    申请人: David K. Green

    发明人: David K. Green

    IPC分类号: F16K1738

    摘要: A well control system having well controlled fluids distributed through pipes includes valves that are opened by a heat softened valve obstruction element. The translation of a fluid flow obstructing gate in a gate valve is driven by a stem element attached to the gate. Without a mechanical or fluid obstacle, fluid pressure in the distribution pipe above about 2 psi will drive the valve gate to a biased position. This internal pressure displacement of the valve gate also displaces the gate stem. In the present invention, the displacement of gate stems for critical valves from a normal maintenance position to an emergency activation position, is obstructed by a fusible barrier that is secured across the gate stem translation path. In the event of a well fire, at a predetermined temperature of fusion, the barrier element will no longer resist the displacement force imposed by the stem. The internal pipe pressure on the stem will force penetration of the stem through the fusible barrier thereby permitting the valve to open and release fluids into the well for the purpose of plugging uncontrolled well flow and extinguishing the fire.

    摘要翻译: 通过管道分布的具有良好控制的流体的井控系统包括由热软化阀阻塞元件打开的阀。 闸阀中的流体阻流门的平移由连接到闸门的杆件驱动。 没有机械或流体障碍物,分配管中的流体压力大于2psi将驱动阀门到偏置位置。 阀门的这种内部压力位移也使闸门杆移位。 在本发明中,用于临界阀的门杆从正常维护位置到紧急启动位置的位移被固定在闸杆平移路径上的可熔屏障所阻挡。 在井火的情况下,在预定的熔融温度下,阻挡元件将不再抵抗由杆施加的位移力。 杆上的内部管道压力将迫使阀杆穿过可熔屏障,从而允许阀门将流体打开并释放到井中,以堵塞不受控制的井口流动并扑灭火灾。