Patent ID: 7708074
Filing Date: 2010-05-04
Classification: E21B,Y10T

Abstract:
1. A downhole control valve for use in a tubing completion string disposed in a wellbore, the control valve comprising: a housing defining a space therein in fluid communication with a completion string in a wellbore; a tubular member in fluid communication with a subterranean formation and having a first end in the space; an aperture formed through a side wall of the tubular member and within the space adjacent the first end; and a plug assembly coaxially disposed within the first end of the tubular member and in response to a pressure differential between the tubular member and the completion string slideable between a first position adjacent the aperture, so that fluid communication between the tubular member and the space is blocked, and a second position away from the aperture, so that the space and tubular member are in fluid communication.