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US 11,987,746 B2Granted
Ionic liquid corrosion inhibitors
AssigneeHalliburton Energy Services, Inc.
InventorsRobert August Zeller, Philippe Prince
Life of this patent
Estimating the term…
Abstract
Methods for providing corrosion inhibition in conduits, containers, and wellbores penetrating subterranean formations are provided. In some embodiments, the methods include contacting a metal surface with a fluid that includes a corrosion inhibitor additive, in certain embodiments, the corrosion inhibitor additive includes an tonic liquid.
Claims17
A method comprising:
- contacting a metal surface with a fluid comprising a corrosion inhibitor additive by injecting the corrosion inhibitor additive using a capillary injection system, wherein the capillary injection system comprises a capillary injection tube connected to a side-pocket mandrel at a lower section of a production tubing;
- wherein the corrosion inhibitor additive comprises an ionic liquid;
- wherein the ionic liquid comprises an organic cation and an organic anion, wherein the organic anion comprises two anionic moieties, a carboxylate anionic moiety and a phosphonate anionic moiety, wherein the organic cation comprises an ammonium cationic moiety, wherein the ionic liquid has a stoichiometric ratio of anionic moieties to cationic moieties from 1:1 to 1:2;
- wherein the two anionic moieties and the ammonium cationic moiety each comprises R1, R2, R3, and R4, wherein each of R1, R2, R3, and R4 comprises a hydrocarbon chain;
- wherein the two anionic moieties are bonded via a linking moiety comprising a C1 to C20 hydrocarbon chain;
- wherein at least one of R1, R2, R3, R4, and the linking moiety comprises a heteroatom;
- and
- wherein the corrosion inhibitor additive at least partially inhibits corrosion of the metal surface.
5 more elements
A method comprising:
- introducing a corrosion inhibitor additive into a wellbore penetrating at least a portion of a subterranean formation by injecting the corrosion inhibitor additive using a capillary injection system, wherein the capillary injection system comprises a capillary injection tube connected to a side-pocket mandrel at a lower section of a production tubing,
- wherein the corrosion inhibitor additive comprises an ionic liquid;
- wherein the ionic liquid comprises an organic cation and an organic anion, wherein the organic anion comprises two anionic moieties, a carboxylate anionic moiety and a phosphonate anionic moiety, wherein the organic cation comprises an ammonium cationic moiety, wherein the ionic liquid has a stoichiometric ratio of anionic moieties to cationic moieties from 1:1 to 1:2;
- wherein the two anionic moieties and the ammonium cationic moiety each comprises R1, R2, R3, and R4, wherein each of R1, R2, R3, and R4 comprises a hydrocarbon chain;
- wherein the two anionic moieties are bonded via a linking moiety comprising a C1 to C20 hydrocarbon chain;
- wherein at least one of R1, R2, R3, R4, and the linking moiety comprises a heteroatom and
- contacting a metal surface in the wellbore with the corrosion inhibitor additive wherein the corrosion inhibitor additive at least partially inhibits corrosion of the metal surface.
4 more elements
A method comprising:
- introducing a fluid comprising a corrosion inhibitor additive into at least a portion of a conduit or container comprising a metal surface by injecting the corrosion inhibitor additive using a capillary injection system, wherein the capillary injection system comprises a capillary injection tube connected to a side-pocket mandrel at a lower section of a production tubing,
- wherein the corrosion inhibitor additive comprises an ionic liquid;
- wherein the ionic liquid comprises an organic cation and an organic anion,
- wherein the organic anion comprises two anionic moieties, a carboxylate anionic moiety and a phosphonate anionic moiety,
- wherein the organic cation comprises an ammonium cationic moiety, wherein the ionic liquid has a stoichiometric ratio of anionic moieties to cationic moieties from 1:1 to 1:2;
- wherein the two anionic moieties and the ammonium cationic moiety each comprises R1, R2, R3, and R4, wherein each of R1, R2, R3, and R4 comprises a hydrocarbon chain;
- wherein the two anionic moieties are bonded via a linking moiety comprising a C1 to C20 hydrocarbon chain;
- wherein at least one of R1, R2, R3, R4, and the linking moiety comprises a heteroatom;
- and
- contacting the metal surface with the corrosion inhibitor additive;
- wherein the corrosion inhibitor additive at least partially inhibits corrosion of the metal surface.
8 more elements
Dependencies are inferred from the claim text.