The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 19, 2021
Filed:
Jul. 23, 2020
Applicant:
Southwest Petroleum University, Sichuan, CN;
Inventors:
Assignee:
SOUTHWEST PETROLEUM UNIVERSITY, Chengdu, CN;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07C 233/36 (2006.01); C09K 8/68 (2006.01);
U.S. Cl.
CPC ...
C07C 233/36 (2013.01); C09K 8/68 (2013.01); C09K 2208/26 (2013.01);
Abstract
Disclosed are a recyclable clean fracturing fluid thickener, a preparation method and a recovery method thereof, and a high-temperature resistant clean fracturing fluid, which relate to the stimulation treatment of oil and gas fields. Diethanolamine and thionyl chloride are used as raw materials and reacted to obtain an intermediate, which is then reacted with an unsaturated fatty acid amidopropyl dimethylamine to produce the recyclable clean fracturing fluid thickener. The clean fracturing fluid can be used in the fracturing stimulation treatment of low and medium permeability reservoirs.