Patent ID: 8215408
Filing Date: 2012-07-10
Classification: E21B,Y10T

Abstract:
1. A system for actuating a tool in a well, comprising: a downhole well tool; a pilot valve; and a control module coupled to the downhole well tool to control actuation of the downhole well tool, the control module comprising a module piston and three control lines in which a first control line delivers a fluid to displace the module piston to a desired downhole well tool actuation position, a second control line supplies fluid to the downhole well tool to actuate the downhole well tool, and a third control line supplies fluid to reset the module piston after a desired actuation of the downhole well tool, wherein the three control lines operate with a single pressure level, and wherein: the module piston is moved through a module piston housing in predetermined increments; the predetermined increments are controlled by a metering piston; and the pilot valve enables return of the metering piston to an original position between each incremental move of the module piston.