Hydraulic control system for downhole tools

A system for selectively actuating multiple well tool assemblies, the system comprising:

• multiple hydraulic lines connected to multiple well tool assemblies in a well, each of the hydraulic lines being connected to an actuation control module of each of the well tool assemblies;
• each actuation control module including a selecting device and a fluid metering device, with each selecting device and fluid metering device having a corresponding well tool assembly;
• each selecting device comparing pressure on a second one of the hydraulic lines to a reference pressure source, the corresponding well tool assembly of the selecting device being selected when the second hydraulic line pressure is greater than the reference pressure by a corresponding first predetermined amount;
• and
• each fluid metering device transferring fluid from the second hydraulic line to an actuator of the corresponding well tool assembly in response to alternating pressure increases and decreases on a first one of the hydraulic lines when the corresponding well tool assembly is selected.