Patent ID: 7967071
Filing Date: 2011-06-28
Classification: E21B

Abstract:
1. A method of controlling fluid flow in a completion string, the method comprising the steps: (a) locating a completion assembly at an end of a tubing string, wherein the completion assembly comprises a substantially tubular body for connection in the tubing string below a production packer, the assembly having a through bore with a first inlet and a first outlet coaxial with the tubing string; a downhole electronic actuating mechanism a downhole hydraulic pump and a hydraulically operated valve member; wherein the actuating mechanism operates the hydraulic pump to provide at least one hydraulic control line to control movement of the valve member from a first position, where the member is open and a through bore is created between the inlet and outlet of the assembly, to a second position, where the valve seals the through bore and, finally, back to the first position, the valve member being operable in the first position for running the tubing string into a wellbore; (b) running the tubing string into the well bore with the valve in the first position for fluid to flow in the inlet and out of the outlet as it fills the string; (c) actuating the valve member to move to the second position and setting the production packer to thereby provide a downhole barrier; (d) actuating the valve back to the first position to allow produced fluids to flow in the inlet and out of the outlet up the string.