Environmentally friendly corrosion inhibitors for high temperature applications

Patent metadata

Field	Value
Publication number	US-10240240-B2
Application number	US-201415309971-A
Country	US
Kind code	B2
Filing date	Jul 31, 2014
Priority date	Jul 31, 2014
Publication date	Mar 26, 2019
Grant date	Mar 26, 2019

Abstract

Methods of inhibiting corrosion of metal surfaces by aqueous acids are described. The methods include combining an effective amount of a corrosion inhibitor composition with an aqueous acid solution to form an inhibited acid solution and contacting a metal surface with the inhibited acid solution. The corrosion inhibitor composition includes an aromatic ketone or a salt thereof.

First claim

What is claimed is:

1. A method of inhibiting corrosion of metal surfaces by aqueous acids comprising:
combining an effective amount of a corrosion inhibitor composition with an aqueous acid solution to form an inhibited acid solution, the corrosion inhibitor composition consisting of:
(i) an aromatic ketone or a salt thereof having the structure:

wherein R 1 is an aromatic ring substituted at one or both meta positions with an alkyl group having 1-12 carbons and R 2 is a cyclic alkane substituted with at least one amine group in or on the cyclic alkane,
(ii) formaldehyde,
(iii) cinnamaldehyde,
(iv) methanol, and
(v) formic acid; and
contacting a metal surface with the inhibited acid solution.

2. The method of claim 1 , wherein the aromatic ketone comprises ethyl phenyl keto cyclohexyl amino hydrochloride.

3. The method of claim 1 , wherein the corrosion inhibitor composition comprises about 0.01 to about 99.9 weight percent of the aromatic ketone.

4. The method of claim 3 , wherein the corrosion inhibitor composition comprises about 2.0 to about 40.0 weight percent of the aromatic ketone.

5. The method of claim 4 , wherein the corrosion inhibitor composition comprises about 5.0 to about 30.0 weight percent of the aromatic ketone.

6. The method of claim 5 , wherein the corrosion inhibitor composition comprises about 10.0 to about 20.0 weight percent of the aromatic ketone.

7. The method of claim 1 , wherein the aqueous acid solution comprises hydrochloric acid.

8. The method of claim 7 , wherein the aqueous acid solution comprises about 3 weight percent to about 33 weight percent hydrochloric acid.

9. The method of claim 8 , wherein the aqueous acid solution comprises about 15 weight percent hydrochloric acid.

10. The method of claim 1 , wherein the corrosion inhibitor composition comprises about 0.1 to 40.0 weight percent of the formic acid.

11. The method of claim 1 , wherein the metal surface comprises a P-110 steel.

12. The method of claim 1 , wherein the inhibited acid solution contacts the metal surface at temperatures up to about 300° F.

13. The method of claim 12 , wherein the inhibited acid solution contacts the metal surface in an acidizing operation for a carbonate reservoir.

14. The method of claim 1 , wherein the inhibited acid solution exhibits a metal corrosion rate of less than 0.1 lb/ft 2 for 3 hours at 300° F.

15. The method of claim 14 , wherein the inhibited acid solution exhibits a metal corrosion rate of less than 0.05 lb/ft 2 for 3 hours at 300° F.

16. The method of claim 15 , wherein the inhibited acid solution exhibits a metal corrosion rate of about 0.03 lb/ft 2 for 3 hours at 300° F.

Assignees

• Halliburton Energy Services Inc

Inventors

• Wadekar Sushant Dattaram
• Pandey Vandana Neeraj
• Hipparge Gulam Jahangeer

Classifications

• C23F11/122

  Alcohols; Aldehydes; Ketones · CPC title

• C09K8/54

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

• C23F11/04 Primary

  in markedly acid liquids · CPC title

• E21B43/25

  Methods for stimulating production {(by vibrating earth formations E21B43/003)} · CPC title

• E21B41/02

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