Methods and systems for suppressing corrosion of steel surfaces

Patent metadata

Field	Value
Publication number	US-10407610-B2
Application number	US-201515519535-A
Country	US
Kind code	B2
Filing date	Aug 31, 2015
Priority date	Dec 3, 2014
Publication date	Sep 10, 2019
Grant date	Sep 10, 2019

Abstract

Certain metal surfaces are often unable to be contacted effectively with fluids containing hydrofluoric acid due to significant corrosion issues. Steel surfaces represent but one example. Corrosion inhibitor compositions comprising an N-(phosphonoalkyl)iminodiacetic acid or any salt thereof can be used to suppress corrosion of steel surfaces, including those that contain multiple types or grades of steel. Methods for suppressing corrosion of a steel surface can comprise: contacting a steel surface with a corrosive environment, the corrosive environment comprising hydrofluoric acid; exposing the steel surface to a corrosion inhibitor composition, the corrosion inhibitor composition comprising an N-(phosphonoalkyl)iminodiacetic acid or any salt thereof; and suppressing corrosion of the steel surface being contacted with the corrosive environment through exposure to the corrosion inhibitor composition.

First claim

What is claimed is:

1. A method comprising:
contacting a steel surface with a corrosive environment, the corrosive environment comprising hydrofluoric acid;
exposing the steel surface to a corrosion inhibitor composition, the corrosion inhibitor composition comprising an N-(phosphonoalkyl)iminodiacetic acid or any salt thereof; and
suppressing corrosion of the steel surface by the hydrofluoric acid using the N-(phosphonoalkyl)iminodiacetic acid.

2. The method of claim 1 , wherein the corrosion inhibitor composition is present in the corrosive environment when the corrosive environment contacts the steel surface.

3. The method of claim 2 , wherein the corrosive environment comprises a treatment fluid and the steel surface is present within a wellbore or is in fluid communication with a wellbore.

4. The method of claim 3 , wherein a concentration of hydrofluoric acid in the treatment fluid ranges between about 0.25 M and about 5 M.

5. The method of claim 3 , wherein a concentration of the N-(phosphonoalkyl)iminodiacetic acid or any salt thereof in the treatment fluid ranges between about 0.2 M and about 2 M.

6. The method of claim 3 , further comprising:
introducing the treatment fluid into the wellbore;
contacting the treatment fluid with a siliceous material in a subterranean formation penetrated by the wellbore; and
at least partially dissolving the siliceous material with the treatment fluid.

7. The method of claim 2 , further comprising:
combining the corrosion inhibitor composition with the corrosive environment before the corrosive environment contacts the steel surface.

8. The method of claim 1 , wherein the N-(phosphonoalkyl)iminodiacetic acid has a structure of

wherein n is an integer ranging between 1 and about 5.

9. The method of claim 8 , wherein the N-(phosphonoalkyl)iminodiacetic acid comprises N-(phosphonomethyl)iminodiacetic acid.

10. The method of claim 1 , wherein the corrosion inhibitor composition further comprises an organic corrosion inhibitor.

11. The method of claim 1 , wherein the steel surface comprises more than one type of steel alloy.

12. A method comprising:
providing a treatment fluid comprising:
hydrofluoric acid or a hydrofluoric acid-generating compound, and
a corrosion inhibitor composition comprising an N-(phosphonoalkyl)iminodiacetic acid or any salt thereof;

introducing the treatment fluid into a wellbore penetrating a subterranean formation; contacting the treatment fluid with a steel surface present in the wellbore or in fluid communication with the wellbore; and
suppressing corrosion of the steel surface by the hydrofluoric acid or the hydrofluoric acid-generating compound using the N-(phosphonoalkyl)iminodiacetic acid.

13. The method of claim 12 , wherein a concentration of hydrofluoric acid or generatable hydrofluoric acid in the treatment fluid ranges between about 0.25 M and about 5 M.

14. The method of claim 12 , wherein a concentration of the N-(phosphonoalkyl)iminodiacetic acid or any salt thereof in the treatment fluid ranges between about 0.2 M and about 2 M.

15. The method of claim 12 , wherein the N-(phosphonoalkyl)iminodiacetic acid has a structure of

wherein n is an integer ranging between 1 and about 5.

16. The method of claim 15 , wherein the N-(phosphonoalkyl)iminodiacetic acid comprises N-(phosphonomethyl)iminodiacetic acid.

17. The method of claim 12 , wherein the corrosion inhibitor composition further comprises an organic corrosion inhibitor.

18. The method of claim 12 , further comprising:
contacting the treatment fluid with a siliceous material in the subterranean formation; and at least partially dissolving the siliceous material with the treatment fluid.

19. The method of claim 12 , wherein the steel surface comprises more than one type of steel alloy.

20. A method comprising:
providing a steel surface in a wellbore or in fluid communication with a wellbore;
contacting the steel surface with a treatment fluid comprising hydrofluoric acid or a hydrofluoric acid-generating compound and a corrosion inhibitor composition comprising an N-(phosphonoalkyl)iminodiacetic acid or any salt thereof;
wherein a concentration of hydrofluoric acid or generatable hydrofluoric acid in the treatment fluid ranges between about 0.25 M and about 5 M and wherein a concentration of the N-(phosphonoalkyl)iminodiacetic acid or any salt thereof in the treatment fluid ranges between about 0.2 M and about 2 M;
suppressing corrosion of the steel surface by the hydrofluoric acid or the hydrofluoric acid-generating compound using the N-(phosphonoalkyl)iminodiacetic acid; and
maintaining the steel surface in operational use after contacting the treatment fluid with the steel surface.

21. The method of claim 20 , wherein the steel surface comprises at least a portion of a subsea riser structure.

22. The method of claim 20 , wherein the steel surface comprises more than one type of steel alloy.

Assignees

• Halliburton Energy Services Inc

Inventors

• Lablanc Alyssa Lynn
• Reyes Enrique Antonio
• Beuterbaugh Aaron M

Classifications

• E21B41/02

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

• C23F11/04

  in markedly acid liquids · CPC title

• C09K8/74

  combined with additives added for specific purposes · CPC title

• C23F11/1676

  Phosphonic acids · CPC title

• C09K8/54 Primary

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