Patent ID: 6869063

Claim:
A sleeve valve device for fluid flow between a hydrocarbon reservoir and a well in the hydrocarbon reservoir, where the well in the reservoir area comprises a casing, where the sleeve valve has an elongate, cylindrical shape and is mounted inside the casing or is integral with a portion of the casing and comprises a fixed outer sleeve and a rotatable inner sleeve which by means of an actuator or a tool is rotatable in order to bring apertures in the outer sleeve and the inner sleeve into and out of correspondence with each other, for adjustment of the fluid flow through the apertures, characterized in that the inner sleeve comprises at least one external bulb with a surface which, in an unassembled, unloaded condition of the outer sleeve and the inner sleeve , is at a distance 1 1 from the inner sleeve's center line which is greater than the outer sleeve's internal radius r 2 , and, in the inner sleeve's unassembled condition, the bulb's surface is cylindrical and has a center line which is parallel to the inner sleeve's center line, and that the center line of the bulb's cylindrical surface is located between the bulb and the inner sleeve's center line; the bulb's surface is larger than a corresponding aperture in the outer sleeve; and by means of a rotation of the inner sleeve to a closed position of the sleeve valve, the bulb can be caused to cover the outer sleeve's aperture; whereby the bulb in the closed position encompasses the outer sleeve's aperture with a sealing contact pressure in an area round the outer sleeve's aperture.