Patent ID: 6880638
Filing Date: 2005-04-19
Classification: E21B,F16K,Y10S

Abstract:
1. A device for an opening in an outer sleeve that is a part of a sleeve valve for fluid flow between a hydrocarbon reservoir and a well in the hydrocarbon reservoir, where the well comprises a tubing, where the outer sleeve is fixed and forms a part of the tubing, and the sleeve valve further comprises a movable inner sleeve which by means of an actuator or a tool is movable between positions in which the opening in the outer sleeve is aligned or misaligned with an opening in the inner sleeve, in order to admit or shut off the fluid flow, the device comprising: the outer sleeve opening being provided with a radially movable sealing element having a through-going radial opening adapted to correspond with the inner sleeve opening and having an encircling sealing surface that is adapted to rest against the inner sleeve around the opening in the inner sleeve; a tension element being arranged between corresponding bearing portions on the sealing element and the outer sleeve respectively, and presses the sealing element with its sealing surface against the inner sleeve; disposed between the side face of the sealing element and the side face of the outer sleeve opening is a pressure chamber where a portion of the side face of the sealing element forms a pressure face which under the effect of pressure in the pressure chamber presses the sealing element against the inner sleeve; and the pressure chamber via at least one connection is connected to at least one pressure source, whereby propagation of pressure from the pressure source to the pressure chamber causes the sealing element with its sealing surface to be pressed even more against the inner sleeve.