Polymer and preparation method thereof, and viscosified acid fluid

US9932517B1 · kind B1 · utility

Assignees

• CHINA UNIVERSITY OF PETROLEUM (EAST CHINA) · CN
• Research Institute of Petroleum Exploration and Development · CN

Inventors

• Caili Dai · Qingdao, CN
• Mingwei Zhao · Qingdao, CN
• He Liu · Beijing, CN
• Yining Wu · Qingdao, CN
• Yongpeng Sun · Qingdao, CN
• Guang Zhao · Qingdao, CN
• Zhongliang Xu · Qingdao, CN

Key dates

• Filing date: Aug 8, 2017
• Grant date: Apr 3, 2018
• Expiry date: Aug 8, 2037

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K2208/32
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to the field of oil-field chemical reagents, and discloses a polymer, a preparation method of the polymer, and a viscosified acid fluid. The polymer contains structural units represented by formula (1), structural units represented by formula (2), and structural units represented by formula (3), wherein, R1-R6 and R11-R13 are H or C1-C4 linear or branched alkyl respectively and independently, R7 is C1-C4 linear or branched alkylene, R8-R10 are C1-C5 linear or branched alkyl respectively and independently, R14 is C1-C4 linear or branched alkyl, and n=0-4.