Differential filters for removing water during oil production
AssigneeSchlumberger Technology Corporation
InventorsLeiming Li, Curtis L. Boney
Life of this patent
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Abstract
A method of removing a partial amount of water in a well, comprises deploying a differential filter downhole; and performing a downhole operation, wherein the differential filter comprises a swellable polymer that swells after contacting water such that permeability of the differential filter is reduced by removing said partial amount of water, the swellable polymer being non-soluble in the water and/or hydrocarbon and wherein the swellable polymer comprises at least one selected from the group consisting of polyacrylic acid, polyacrylate, polymethacrylic acid, poly maleic anhydride, polyacrylamide, polyvinyl alcohol, latex, polyamide, polyester, and a co-polymer thereof.
Claims24
A method for removing at least a partial amount of water in a well, the method comprising:
- deploying a differential filter downhole;
- and
- performing a downhole operation;
- wherein the differential filter comprises a swellable polymer that swells after contacting water such that permeability of the differential filter is reduced by removing said partial amount of water, the swellable polymer being non-soluble in the water and/or hydrocarbon and wherein the swellable polymer comprises at least one selected from the group consisting of polyacrylic acid, polyacrylate, polymethacrylic acid, poly maleic anhydride, polyacrylamide, polyvinyl alcohol, latex, polyamide, polyester, and any co-polymer thereof.
A method for removing at least a partial amount of water in a well, the method comprising:
- deploying a differential filter downhole;
- and
- performing a downhole operation;
- wherein the differential filter comprises a swellable polymer that swells after contacting water such that permeability of the differential filter is reduced by removing said partial amount of water, the swellable polymer being non-soluble in the water and/or hydrocarbon and able not to release said partial amount of water at a temperature below 300° C., and wherein the swellable polymer comprises at least one selected from the group consisting of polyacrylic acid, polyacrylate, polymethacrylic acid, poly maleic anhydride, polyacrylamide, polyvinyl alcohol, latex, polyamide, polyester, and any co-polymer thereof.
A method comprising:
- deploying a differential filter downhole;
- and
- performing a downhole operation;
- wherein the differential filter comprises a swellable polymer that swells after contacting water such that permeability of the differential filter is reduced by removing said partial amount of water, the swellable polymer being non-soluble in the water and/or hydrocarbon, and able not to release said partial amount of water at a temperature below 300° C., wherein the differential filter is mixed in a fluid for downhole use, and wherein the swellable polymer comprises at least one selected from the group consisting of polyacrylic acid, polyacrylate, polymethacrylic acid, poly maleic anhydride, polyacrylamide, polyvinyl alcohol, latex, polyamide, polyester, and any co-polymer thereof.
Dependencies are inferred from the claim text.