CORROSION INHIBITORS FOR OIL AND GAS APPLICATIONS

• US 20120149608A1
• Filed: 12/08/2010
• Published: 06/14/2012
• Est. Priority Date: 12/08/2010
• Status: Active Grant

• Current Assignee: ChampionX USA Inc. (ChampionX Corporation)
• Original Assignee: Nalco Company (Ecolab, Inc.)
• Inventors: Meyer, G. Richard, Monk, Keith Allen
• Granted Patent: US 8,618,027 B2
• Time in Patent Office: Days
• US Class Current: 507/244
• CPC Class Codes: C09K 8/54 Compositions for in situ inhibition of corrosion in boreholes or wells
• CPC Class Codes: C23F 11/10 using organic inhibitors

Abstract

A corrosion inhibitor composition and method of inhibiting corrosion on a surface in an oil or gas application is disclosed and claimed. The corrosion inhibitor includes at least one fatty acid; at least one alkanolamine; at least one alkylamine; and at least one organic sulfonic acid. The method of inhibiting corrosion includes on a surface in an oil or gas application comprises contacting an effective dosage of the corrosion inhibitor with the surface.

Claims

1. A corrosion inhibitor composition comprising:

at least one fatty acid;

at least one alkanolamine;

optionally at least one alkylamine; and

at least one organic sulfonic acid.

2. The corrosion inhibitor of claim 1, wherein the at least one fatty acid comprises at least one selected from:

trimeric C₁₈ unsaturated fatty acid;

dimer acids, polymerized tall-oil fatty acids;

at least one component of a crude tall oil composition; and

any combination of the foregoing.

3. The corrosion inhibitor composition of claim 1, wherein the at least one alkanolamine comprises at least one N,N-dimethylethanolamine.

4. The corrosion inhibitor of claim 3, wherein the at least one N,N-dimethylethanolamine comprises at least one selected from the group consisting of:

N,N-dimethylaminoethoxy)ethanol;

dimethylethanolamine; and

combinations thereof.

5. The corrosion inhibitor of claim 1, wherein the at least one organic sulfonic acid comprises branched dodecylbenzenesulfonic acid.

6. The corrosion inhibitor of claim 1, wherein the at least one alkylamine comprises at least one substituted alkylamine.

7. The corrosion inhibitor of claim 6, wherein the at least one substituted alkylamine comprises dimethylethanolamine.

8. The corrosion inhibitor of claim 1, further comprising at least one dispersant.

9. The corrosion inhibitor of claim 8, wherein the at least one dispersant comprises at least one oxyalkylate polymer.

10. The corrosion inhibitor of claim 1, further comprising at least one solvent.

11. The corrosion inhibitor of claim 10, wherein the at least one solvent comprises at least one selected from:

methanol, ethanol, propanol, isopropanol, butanol, isobutanol, aromatic hydrocarbons, monoethyleneglycol, ethyleneglycolmonobutylether, and combinations thereof.

12. The corrosion inhibitor of claim 1, comprising the following formula (1) using dimethylalkanolamines with timer acid:

13. The corrosion inhibitor of claim 1, comprising the following formula (2) using dimethylalkanolamines with trimer acid:

14. The corrosion inhibitor of claim 1, comprising the following formula (3) using dimethylalkanolamines with tall oil:

15. The corrosion inhibitor composition of claim 1, comprising the following formula (4) using dimethylalkanolamines with tall oil:

16. The corrosion inhibitor composition of claim 1, comprising the following formula (5) using dimethylalkanolamines with branched dodecylbenzene sulfonic acid:

17. The corrosion inhibitor composition of claim 1, comprising the following formula (6) using dimethylalkanolamines with branched dodecylbenzene sulfonic acid:

18. The corrosion inhibitor composition of claim 1, comprising about 10 wt % to about 100 wt % of actives comprising the at least one fatty acid;

the at least one alkanolamine;

optionally the at least one alkylamine; and

the at least one organic sulfonic acid.

19. A method of inhibiting corrosion on a surface in an oil or gas application, the method comprising contacting an effective dosage of the corrosion inhibitor of claim 1 with the surface.

20. The method of claim 19, wherein the effective dosage range is between about 10 ppm to about 10,000 ppm.

21. The method of claim 19, further comprising dosing the corrosion inhibitor into an annulus of a well;

allowing the dosed corrosion inhibitor to travels into the well;

and recovering the corrosion inhibitor with a produced fluid thereby avoiding entering a formation.

22. The method of claim 19, further comprising treating a subterranean formation penetrated by a wellbore comprising pumping through well tubular goods and injecting into the subterranean formation the effective dosage of said corrosion inhibitor to inhibit corrosion of metallic surfaces of said well tubular goods in contact with said composition.