It must be remembered that the control panel is the central controller for the entire well safety system installed at the well site. This prevents the damages to the ball and seat of the safety valve. The well safety system incorporates a special feature that (when properly adjusted for the well conditions) equalizes the well pressure on both sides of the subsurface safety valve before allowing it to open completely. A panel mounted pneumatic relay valve works in conjunction with other manual / automatic hydraulic control valves to put the safety system in operation (open the well).Ībnormally high or low pressure in the well flow line, a loss of hydraulic pressure or input pneumatic supply, or the operation of a fusible plug in the ESD pilot line, the flow line pilot will cause the system to block and bleed safety valve control line pressure and the normally closed safety valves to shut in the well flow. The design function of the well control system is to provide an immediate shut-in of the surface and subsurface safety valves in the event of maintenance or an emergency at the well site. The Otis control panel is connected to monitor a number of conditions at the well site and shut the safety system if the appropriate monitors detect an abnormal condition.
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