| 摘要 |
<p>A sleeve valve device for fluid flow between a hydrocarbon reservoir and a well in the hydrocarbon reservoir comprises a fixed outer sleeve (1) and an inner sleeve (2) which is rotatable in order to bring apertures (3, 4) 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. The inner sleeve comprises at least one external bulb (5) with a surface (6) which, in an unassembled, unloaded condition of the outer sleeve (1) and the inner sleeve (2), is at a distance (11) from the inner sleeve's centre line (9) which is greater than the outer sleeve's internal radius (r2). The bulb (5) has a surface (6) which is larger than a corresponding aperture (3) in the outer sleeve, and by means of a rotation of the inner sleeve (2) to a closed position of the sleeve valve, the bulb (5) can be caused to cover the outer sleeve's aperture (3), whereby the bulb (5) in the closed position encompasses the outer sleeve's aperture (3) with a sealing contact pressure in an area (8) round the outer sleeve's aperture (3).</p> |
