Patent ID: 9228423
Filing Date: 2016-01-05
CPC Classification: E21B

Claim Text:
1. A system for controlling flow in a wellbore, comprising: a tubing string having a plurality of flow control valve assemblies, each flow control valve assembly comprising a flow control valve and a control module, the control module being coupled with a first hydraulic line, a second hydraulic line, and an electrical line; each control module comprising a plurality of solenoid valves which respond to electric signals transmitted along the electrical line to control the opening and closing of the flow control valve via fluid passing through the first and second hydraulic lines, the control module further providing a hydraulic override to enable shifting of the flow control valve without requiring electric power supplied to the control module, the hydraulic override comprising a hydraulically actuated valve which is in a normally open position, the hydraulically actuated valve being held in a closed position by pressure applied via the first hydraulic line until a hydraulic override is desired.