초록 ▼

A subsurface solenoid operated well safety valve which is locked in the open position, after being opened by the solenoid, for preventing the valve from closing by various forces overcoming the solenoid. A valve closure member in the bore of a housing moves between open and closed positions and is c

A subsurface solenoid operated well safety valve which is locked in the open position, after being opened by the solenoid, for preventing the valve from closing by various forces overcoming the solenoid. A valve closure member in the bore of a housing moves between open and closed positions and is controlled by a tubular member which is biased in a direction to close the valve. An armature is movable in the housing and a solenoid coil is energized to move the armature. A first releasable lock connects the armature to the tubular member for allowing the movement of the solenoid to open the valve. The first lock is released when the valve is opened. A second releasable lock locks the tubular member to the housing in the open position prior to the release of the first lock means. The de-energization of the coil releases the armature and the second lock to allow the valve to close.

대표청구항 ▼

A solenoid actuated well safety valve comprising, a housing having a bore, a valve closure member in the bore moving between open and closed positions, a tubular member telescopically movable in the housing for controlling the movement of the valve closure member, biasing means acting on said tubula

A solenoid actuated well safety valve comprising, a housing having a bore, a valve closure member in the bore moving between open and closed positions, a tubular member telescopically movable in the housing for controlling the movement of the valve closure member, biasing means acting on said tubular member for moving the tubular member in a direction to close said valve, an armature movable in the housing, a solenoid coil positioned adjacent the housing for moving the armature, first releasable lock means for connecting the armature to the tubular member whereby movement of the armature by the solenoid will open the valve, and said first lock means being released when the valve is opened, and second releasable lock means for locking the tubular member in the open position prior to the release of the first lock means.