Shear resistant swellable packers
Disclosed are a variety of methods and systems related to zonal isolation in wellbores, and more particularly, swellable packer assemblies. In embodiments, a swellable packer includes a base conduit, a reinforcement element disposed annularly about the base conduit, that includes an annular section, a stabilizing foot to stabilize the annular section relative to the base conduit, and a swellable material annularly disposed outside the base conduit and in contact with the reinforcement element. In other embodiments, the swellable packer is introduced in a run-in-hole position into a borehole or wellbore, wherein the swellable material absorbs fluid and expands, thereby applying a gripping force to a region of the borehole or wellbore to seal off an annulus around the swellable packer.
1 . A swellable packer, comprising:
a base conduit;
at least two reinforcement elements disposed annularly about the base conduit, each comprising:
an annular section; and
a stabilizing foot to stabilize the annular section relative to the base conduit, wherein the annular section and the stabilizing foot form a “T” shape; and
a swellable material annularly disposed outside the base conduit and in contact with the at least two reinforcement elements, wherein the swellable material is disposed longitudinally in between the at least two reinforcement elements.
2 . The swellable packer of claim 1 , wherein a height of the annular section is greater than a width of the stabilizing foot.
3 . The swellable packer of claim 2 , wherein the height of the annular section is at least two times the width of the stabilizing foot.
4 . The swellable packer of claim 1 , wherein a width of an interface between the at least two reinforcement elements and the base conduit is greater than a width of the annular section.
5 . The swellable packer of claim 1 , wherein the swellable packer is in:
a run-in-hole position; or
an expanded position.
6 . The swellable packer of claim 1 , wherein the at least two reinforcement elements comprise a plurality of non-helical discs distributed across an axial length of a swelling section of the swellable packer.
7 . The swellable packer of claim 1 , wherein the reinforcement element is disposed helically around the base conduit.
8 . A method, comprising:
introducing a swellable packer in a run-in-hole position into a borehole or wellbore, wherein the swellable packer comprises:
a base conduit;
at least two reinforcement elements, each comprising:
an annular section; and
a stabilizing foot to stabilize the annular section relative to the base conduit, wherein the annular section and the stabilizing foot form a “T” shape; and
a swellable material concentrically disposed outside the base conduit and in contact with the at least two reinforcement elements, wherein the swellable material absorbs fluid and expands, thereby applying a gripping force to a region of the borehole or wellbore to seal off an annulus around the swellable packer, wherein the swellable material is disposed longitudinally in between the at least two reinforcement elements.
9 . The method of claim 8 , wherein a height of the annular section is greater than a width of the stabilizing foot.
10 . The method of claim 9 , wherein the height of the annular section is at least two times the width of the stabilizing foot.
11 . The method of claim 9 , wherein a width of an interface between the at least two reinforcement elements and the base conduit is greater than a width of the annular section.
12 . The method of claim 8 , wherein the swellable material comprises a water-swelling material, an oil-swelling material, or both.
13 . The method of claim 8 , wherein the at least two reinforcement elements comprise a plurality of non-helical structures distributed across an axial length of a swelling section of the swellable packer.
14 . The method of claim 8 , wherein the reinforcement element is disposed helically around the base conduit.
15 . A method, comprising:
sliding two or more reinforcement elements along an outer diameter of a base conduit, wherein each of the two or more reinforcement elements comprises:
a stabilizing foot to stabilize an annular section relative to the base conduit, wherein the annular section and the stabilizing foot form a “T” shape; and
depositing a swelling material annularly about the base conduit and one of the two or more reinforcement elements, wherein the swellable material is disposed longitudinally in between the two or more reinforcement elements.
16 . The method of claim 15 , further comprising: applying primer and/or adhesive to the base conduit and the two or more reinforcement elements; and vulcanizing the swelling material using steam vulcanization.
17 . The method of claim 15 , wherein the two Lonell or more reinforcement elements comprises: a plurality of non-helical structures disposed axially along a length of a swelling section of the base conduit; or a helical structure winding around the base conduit.
18 . The method of claim 15 , wherein a height of the annular section is greater than a width of the stabilizing foot; and/or a width of an interface between one of the two or more reinforcement elements and the base conduit is greater than a width of the annular section.