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. 31, 2023
Filed:
Feb. 16, 2021
Applicant:
Saudi Arabian Oil Company, Dhahran, SA;
Inventors:
Assignee:
Saudi Arabian Oil Company, Dhahran, SA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K 8/04 (2006.01); C09K 8/12 (2006.01); E21B 21/00 (2006.01); C09K 8/508 (2006.01);
U.S. Cl.
CPC ...
C09K 8/12 (2013.01); C09K 8/04 (2013.01); C09K 8/5086 (2013.01); E21B 21/003 (2013.01); C09K 2208/12 (2013.01);
Abstract
Water-based drilling fluids may include an aqueous base fluid and a mixture of polyethylene polyamines in an amount of from 1 lb/bbl to 20 lb/bbl relative to the total volume of the water-based drilling fluid. The polyethylene polyamines of the mixture may have a first chemical structure HNCHCH(NHCHCH)NH, where x may be an integer greater than or equal to 3. The average molecular weight of the polyethylene polyamines in the water-based drilling fluid having the first chemical structure may be from 200 g/mol to 400 g/mol. Methods for drilling a subterranean well with the water-based drilling fluids are also disclosed.