Patent ID: 7128152
Filing Date: 2006-10-31
Classification: E21B

Abstract:
1. A service tool for use in a well, comprising: a tubular having a central passageway therethrough; a crossover through which fluid flowing down the central passageway can exit the central passageway and enter a lower annulus below a packer and fluid flowing up the central passageway can exit the central passageway and enter an upper annulus above the packer; a valve having a housing mounted to the tubular, the valve being positioned to allow or block fluid flow from the lower annulus into the central passageway through an opening in a wall of the tubular, in which the valve further comprises a piston sealingly and moveably mounted within the housing; and a responsive member mounted in a wall of the housing, wherein the responsive member must be transitioned from a closed position to an open position to enable fluid flow through the wall for actuation of the valve.