Ionic liquid corrosion inhibitors

Patent metadata

Field	Value
Publication number	US-11987746-B2
Application number	US-201917615997-A
Country	US
Kind code	B2
Filing date	Jul 2, 2019
Priority date	Jul 2, 2019
Publication date	May 21, 2024
Grant date	May 21, 2024

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.

First claim

What is claimed is:

1. 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.

2. The method of claim 1 , wherein the organic cation further comprises one or more cationic moieties selected from the group consisting of an imidazolium cation, a pyrrolidinium cation, a morpholinium cation, a pyridinium cation, a pyrazolium cation, a triazolium cation, a sulfonium cation, a phosphonium cation, and any combination thereof.

3. The method of claim 1 , wherein the organic anion further comprises one or more anionic moieties selected from the group consisting of a sulfonate anion, a thiolate anion, and any combination thereof.

4. The method of claim 1 , further comprising the step of introducing the corrosion inhibitor additive to the fluid.

5. The method of claim 1 , wherein the corrosion inhibitor additive is present in an amount from about 1 parts per million (“ppm”) to about 5,000 ppm based on the volume of the fluid.

6. The method of claim 1 , wherein the fluid further comprises a rheology modifier.

7. The method of claim 1 , wherein the metal surface comprises a metal selected from the group consisting of a ferrous alloy, a carbon steel, any derivative thereof, and any combination thereof.

8. The method of claim 1 , wherein the ionic liquid is a reaction product of a reaction between (i) a carbonate salt of the organic cation and (ii) an acid of the organic anion; wherein water and carbon dioxide are evaporated to leave behind the ionic liquid.

9. The method of claim 1 , wherein the ionic liquid is a reaction product of a reaction between (i) a methyl carbonate salt of the organic cation and (ii) an acid of the organic anion; wherein methanol and carbon dioxide are evaporated to leave behind the ionic liquid.

10. 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.

11. The method of claim 10 , wherein the organic cation further comprises one or more cationic moieties selected from the group consisting of an imidazolium cation, a pyrrolidinium cation, a morpholinium cation, a pyridinium cation, a pyrazolium cation, a triazolium cation, a sulfonium cation, a phosphonium cation, and any combination thereof.

12. The method of claim 10 , wherein the organic anion further comprises one or more anionic moieties selected from the group consisting of a sulfonate anion, a thiolate anion, and any combination thereof.

13. The method of claim 10 , wherein the metal surface comprises a metal selected from the group consisting of a ferrous alloy, a carbon steel, any derivative thereof, and any combination thereof.

14. The method of claim 10 , further comprising allowing the corrosion inhibitor additive to contact a treatment fluid residing in the wellbore or subterranean formation.

15. 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.

16. The method of claim 15 , wherein the organic cation further comprises one or more cationic moieties selected from the group consisting of an imidazolium cation, a pyrrolidinium cation, a morpholinium cation, a pyridinium cation a pyrazolium cation, a triazolium cation, a sulfonium cation, a phosphonium cation, and any combination thereof.

17. The method of claim 15 , wherein the organic anion further comprises one or more anionic moieties selected from the group consisting of a sulfonate anion, a thiolate anion, and any combination thereof.

Assignees

• Halliburton Energy Services Inc

Inventors

• Zeller Robert August
• Prince Philippe

Classifications

• C09K8/54 Primary

  Compositions for in situ inhibition of corrosion in boreholes or wells · CPC title

• C23F11/163

  Sulfonic acids · CPC title

• E21B41/02

  in situ inhibition of corrosion in boreholes or wells · CPC title

• C09K2208/32

  Anticorrosion additives · CPC title

• C23F11/10 Primary

  using organic inhibitors · CPC title