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:
Apr. 21, 2020
Filed:
May. 17, 2019
Applicant:
King Fahd University of Petroleum and Minerals, Dhahran, SA;
Inventors:
Ime Bassey Obot, Dhahran, SA;
Saviour Alphonsus Umoren, Dhahran, SA;
Assignee:
KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS, Dhahran, SA;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09K 8/54 (2006.01); C09K 8/74 (2006.01); C09K 8/70 (2006.01); E21B 43/28 (2006.01); C23F 11/14 (2006.01);
U.S. Cl.
CPC ...
C09K 8/54 (2013.01); C09K 8/74 (2013.01); C09K 8/70 (2013.01); C23F 11/149 (2013.01);
Abstract
A method of inhibiting corrosion of metal during acid stimulation of an oil and gas well, whereby the oil and gas well is treated with an acidic treatment fluid that includes 10 to 28 wt. % of an acid, based on a total weight of the acidic treatment fluid, and 0.01 to 5% of a pyrazine corrosion inhibitor by weight per total volume of the acidic treatment fluid, wherein the pyrazine corrosion inhibitor is 2,3-pyrazine dicarboxylic acid, pyrazine-2-carboxamide, 2-methoxy-3-(1-methylpropyl) pyrazine, or combinations thereof.