Sand screens and related products and methods
AssigneeIsealate AS
InventorBengt Gunnarsson
Life of this patent
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Abstract
An expandable sand screen device is described comprising in various examples a rolled-up piece of screen material which is configured to be at least partially unrollable to expand diametrically when located in a wellbore. A piece of screen material may be rolled up to form an expandable roll. In some examples, the expandable sand screen device is run into the wellbore on a running tool and allowed to partially unroll once released from the running tool.
Claims28
An expandable sand screen device comprising a rolled-up piece of screen material which is configured to be at least partially unrollable to expand diametrically when located in a wellbore, wherein the piece of screen material has a thickness in the range of 0.1 to 0.5 mm and is resilient for urging the piece of screen material to at least partially unroll, wherein the piece of screen material comprises a first set of apertures having a longitudinal extent a first direction and a second set of apertures having a longitudinal extent in a second direction which is transverse to the first direction.
A method of setting a sand screen in a wellbore, the method comprising the steps of:
- (a) running a rolled-up expandable sand screen device into the wellbore, the sand screen device comprising a piece of screen material having a thickness in the range of 0.1 to 0.5 mm and wherein the piece of screen material comprises a first set of apertures having a longitudinal extent a first direction and a second set of apertures having a longitudinal extent in a second direction which is transverse to the first direction;
- and
- (b) at least partially unrolling the sand screen device in the wellbore, expanding the sand screen device to emplace the sand screen device on a surrounding wall of the wellbore, letting the sand screen device at least partially unroll, the piece of screen material being resilient to urge the sand screen device to unroll;
- and
- (c) using at least one forcing device to apply an outward force to the piece of screen material.
Dependencies are inferred from the claim text.