Downhole apparatus
AssigneeDarcy Technologies Limited
InventorsStephen Edmund Bruce, Stephen Kent, Dominic Patrick Joseph McCann, David Allan Noblett, David Grant, Ewan Colin Smith
Life of this patent
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Abstract
A downhole apparatus including a tubular body, first and second ports in a wall of the body, and a fluid pressure-responsive valve arrangement having a locked first configuration associated with a first pressure in which the first port is open and the second port is closed, an unlocked second configuration associated with a second pressure higher than the first pressure in which the first port is open and the second port is closed, and a third configuration associated with a third pressure lower than the second pressure in which the second port is open and the first port is closed.
Claims21
1-172. (canceled)
A method of restricting flow between zones in a well, the method comprising the steps of:
- providing a layer of deformable material on a sand screen;
- and
- activating the sand screen such that the deformable material contacts and seals against a wall of the well, wherein the sand screen is activated using fluid deformable chambers mounted on a base pipe.
An apparatus for restricting flow between zones in a well, the apparatus comprising:
- fluid deformable chambers mounted on a base pipe;
- a sand screen provided on the chambers;
- and
- a layer of deformable material provided on the sand screen, wherein upon activation, the fluid deformable chambers increase the diameter of the sand screen, and the layer of deformable material is deformed by the sand screen to contact and seal against a wall of the well.
Dependencies are inferred from the claim text.