Patent ID: 9410400
Filing Date: 2016-08-09
CPC Classification: E21B

Claim Text:
1. A downhole completion, comprising a production casing, and a sliding sleeve assembly connected as part of the production casing, comprising: a tubular part forming part of the production casing and having a recess, an inner face, an opening and an axial extension, a tubular sleeve slidable within the recess and having an outer face and being slidable in the axial extension along the inner face between a first position, wherein fluid is allowed to flow through the opening, and a second position, wherein the fluid flows through the opening to a lesser extent than in the first position, the sleeve being repeatably slidable between the first and second positions, wherein, in the first and second positions, an inner face of the sleeve has a diameter along the entire axial extent of the inner face that is no less than a diameter of the inner face of the tubular part, wherein the tubular sleeve has at least first and second circumferential grooves at the outer face, the first groove comprising a first sealing element and the second groove comprising a second sealing element, wherein the opening has a width (wo) in the axial extension and each sealing element has a width (w wherein the sealing elements are arranged with an axial distance along the axial extension which is larger than the width of the opening such that when one sleeve is in the second position, the first sealing element engages a first surface of the recess adjacent a first side of the opening and the second sealing element engages a second surface of the recess adjacent a second side of the opening, and wherein when the sleeve is in the first position, fluid may be permitted to flow between the tubular part and the opening via the recess, without passing through the sleeve.