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214 条记录 (耗时 0.013 秒)

    Pressure control system
    61.
    发明授权
    Pressure control system 失效
    压力控制系统

    公开(公告)号：US3920040A

    公开(公告)日：1975-11-18

    申请号：US40885573

    申请日：1973-10-23

    申请人： ANDERSON GREENWOOD & CO

    发明人： POWELL WALTER W

    IPC分类号： G05B11/44 ,  G05D16/10 ,  F16K17/00

    CPC分类号： G05B11/44 ,  G05D16/10 ,  Y10T137/7725 ,  Y10T137/7728 ,  Y10T137/7768

    摘要： A control system for shutting down a fluid system when its pressure falls outside of preselected high and/or low pressure limits which control system includes a pressure responsive shutdown valve connected to shut down said fluid system, a control valve controlling the actuating fluid to said shut down valve, an activator connected to actuate said control valve and at least one pilot connected to sense the pressure of the fluid system and to provide response to the fluid system pressure falling outside its preselected limits to the activator whereby said activator moves the control valve to shut-down position, a manual override having a locking piston externally actuated to lock the piston of said activator in normal position for start-up, said locking piston being disengaged responsive to pressure differentials thereacross when pressure in the fluid system exceeds the preselected low pressure limit.

    摘要翻译： 一种控制系统，用于当其压力超过预选的高和/或低压限制时关闭流体系统，该控制系统包括连接以关闭所述流体系统的压力响应关闭阀，控制致动流体的控制阀 所述关闭阀，激活器，其被连接以致动所述控制阀和连接到感测流体系统的压力的至少一个导向器，并且提供响应于流体系统压力超出其对预定极限的活化剂的压力，由此所述激活器将控制器 阀门关闭位置，手动超控具有外部致动的锁定活塞，以将所述启动器的活塞锁定在用于启动的正常位置，所述锁定活塞响应于流体系统中的压力超过预选的压差而分离 低压极限

    High low flow safety valve
    62.
    发明授权
    High low flow safety valve 失效
    高低流量安全阀

    公开(公告)号：US3768506A

    公开(公告)日：1973-10-30

    申请号：US3768506D

    申请日：1971-06-21

    申请人： SOHLUMBERGER TECHN CORP

    发明人： MC GILL H

    IPC分类号： E21B34/00 ,  E21B34/08 ,  F16K5/00

    CPC分类号： E21B34/08 ,  E21B2034/002 ,  Y10T137/7725 ,  Y10T137/7727 ,  Y10T137/7732 ,  Y10T137/7785

    摘要： A high/low flow safety valve according to the present invention relates to a valve construction that may be employed in conjunction with flow conduits such as well production tubing and the like. The valve construction is operative to allow the flow of production fluid through the valve structure as long as the volume of flowing pressurized fluid is within an operating range defined by low and high volume limits. As long as fluid flow and consequent pressure differentials are within the volume limits defining the operating range, a ball type safety valve will remain open allowing the flow of production fluid through. In the event the flow of production fluid should reduce below a predetermined minimum operating level, a low flow actuating means will achieve closing of the ball valve and locking means will effectively lock the valve structure against inadvertent reopening. In the event the velocity of flowing fluid should increase above a predetermined maximum a high flow actuating means will become operative and will force a ball valve to its closed position and lock it against inadvertent reopening. The safety valve structure also includes means for unlocking and reopening the safety valve mechanism for the purpose of resuming production flow through the conduit structure with which the safety valve mechanism is associated.