Patent ID: 9719324
Date: 2017-08-01
CPC Classifications: E21B

Claim:
1. A system for use with a subterranean well, the system comprising: a plurality of hydraulic actuators in the well, all of the actuators being hydraulically connected to a common hydraulic line, and each of the actuators being hydraulically connected to a different one of a plurality of dedicated hydraulic lines, wherein each dedicated hydraulic line only operates a respective one of the actuators to which the dedicated hydraulic line is hydraulically connected, wherein each of the plurality of actuators is only hydraulically connected to the common hydraulic line and one of the plurality of dedicated hydraulic lines such that each actuator is only connected to two hydraulic lines, wherein a common line shutoff valve is operatively connected between the common line and a pump, wherein a dedicated line shutoff valve is operatively connected to each dedicated hydraulic line between each of the actuators and the pump; and a plurality of pressure control devices, each pressure control device preventing flow from the common hydraulic line to a respective one of the actuators unless a pressure differential across the respective pressure control device exceeds a predetermined level, whereby all of the hydraulic actuators can all be reset to a known position by applying pressure to the common hydraulic line, wherein pressure will be communicated to all of the actuators when the pressure differential across the pressure control devices exceeds the predetermined level.