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    • 7. 发明授权
    • Subsurface safety valve
    • 地下安全阀
    • US5598864A
    • 1997-02-04
    • US326017
    • 1994-10-19
    • Russell A. JohnstonDavid A. Bilberry
    • Russell A. JohnstonDavid A. Bilberry
    • E21B34/00E21B34/10E21B34/14
    • E21B34/102E21B2034/005Y10T137/1669
    • A subsurface safety valve has a tubular valve housing, a valve closure member movable between an open and a closed position, an axially shiftable flow tube for opening the valve closure member, a spring for biasing the flow tube to a closed position, a piston and cylinder assembly to move the flow tube to an open position, and a plug inserted within an opening in the valve housing. This opening is in fluid communication with the piston and cylinder assembly. The plug is adapted to be displaced from the opening to lock out the safety valve, and to establish secondary hydraulic fluid communication with an interior of the safety valve in order to operate secondary tools, such as wireline set secondary valves, inserted into the locked out safety valve.
    • 地下安全阀具有管状阀壳体,可在打开和关闭位置之间移动的阀关闭构件,用于打开阀关闭构件的可轴向移动的流动管,用于将流管偏压到关闭位置的弹簧,活塞和 气缸组件将流管移动到打开位置,以及插入插入阀壳体内的开口内的插头。 该开口与活塞和气缸组件流体连通。 插头适于从开口移位以锁定安全阀,并且与安全阀的内部建立第二液压流体连通,以便操作插入锁定的辅助工具,例如电缆设置的二次阀 安全阀门。