Wellbore annular safety valve and method
AssigneeSchlumberger Technology Corporation
InventorOystein Molstre
Life of this patent
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Abstract
A method includes deploying a tubing having a tubing bore in a casing in a wellbore, the tubing including a cup packer forming an annular barrier across a tubing-casing annulus separating the tubing-casing annulus into an upper annulus and a lower annulus, the cup packer having a fluid conduit extending substantially parallel to the tubing bore, and a barrier valve coupled with the fluid conduit to permit one-way fluid flow from the upper annulus to the lower annulus, communicating a fluid from the upper annulus through the barrier valve to the lower annulus, and closing the barrier valve in response to pressure in the upper annulus being less than pressure in the lower annulus.
Claims8
A method, comprising:
- deploying a tubing having a tubing bore in a casing in a wellbore, the tubing comprising a cup packer forming an annular barrier across a tubing-casing annulus separating the tubing-casing annulus into an upper annulus and a lower annulus, the cup packer having a fluid conduit extending substantially parallel to the tubing bore, and a barrier valve coupled with the fluid conduit to permit one-way fluid flow from the upper annulus to the lower annulus;
- communicating a fluid from the upper annulus through the barrier valve to the lower annulus;
- and
- closing the barrier valve in response to pressure in the upper annulus being less than pressure in the lower annulus,
- wherein the barrier valve is located in a side pocket of a side pocket mandrel integrated in the tubing,
- wherein the cup packer is disposed about a feed-through mandrel having a first side and a second side, the first side being thicker than the second side, and
- wherein the side pocket mandrel and the annular barrier are aligned such that the side pocket and the first side of the feed-through mandrel are aligned longitudinally.
Dependencies are inferred from the claim text.