High temperature carbon dioxide corrosion inhibitor

US9404189B2 · kind B2 · utility

Assignees

• CHINA NATIONAL OFFSHORE OIL CORPORATION · CN
• CHINA OILFIELD SERVICES LIMITED · CN

Inventors

• Yongtao Sun · Tianjin, CN
• Zenghua Ma · Tianjin, CN
• Huajun Liu · Tianjin, CN
• Tong Wang · Xiamen, CN
• Tao Lin · Tangxia, CN
• Haitao Liu · Boise, US
• Shaohua Wang · Zhenjiang, CN
• Yubao Sun · Shanghai, CN

Key dates

• Filing date: Oct 29, 2013
• Grant date: Aug 2, 2016
• Expiry date: Aug 8, 2034

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K2208/32
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

The present application relates to a high temperature carbon dioxide corrosion inhibitor comprising the following components by mass percent: amide compound 15˜50%, organic alkynol 10˜25%, mercaptan acid 5˜15%, piperidine 5˜25%, mercaptopyridine 5˜15%, and solvent 25˜60%. The corrosion inhibitor has excellent corrosion inhibition for CO2 corrosion of oil field water system at a high temperature (150˜250° C.).