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:
Dec. 03, 2019
Filed:
Jan. 24, 2014
Applicant:
Basf SE, Ludwigshafen, DE;
Inventors:
Vandana Kurkal-Siebert, Heidelberg, DE;
Guenter Oetter, Frankenthal, DE;
Nicole Lichterfeld-Weber, Römerberg, DE;
Assignee:
BASF SE, , DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 43/16 (2006.01); C09K 8/584 (2006.01); E21B 43/40 (2006.01); E21B 43/26 (2006.01); E21B 37/06 (2006.01); C09K 8/60 (2006.01); C09K 8/68 (2006.01); C09K 8/74 (2006.01); C09K 8/86 (2006.01);
U.S. Cl.
CPC ...
E21B 43/16 (2013.01); C09K 8/584 (2013.01); C09K 8/602 (2013.01); C09K 8/68 (2013.01); C09K 8/74 (2013.01); C09K 8/86 (2013.01); E21B 37/06 (2013.01); E21B 43/26 (2013.01); E21B 43/40 (2013.01);
Abstract
Process for treating subterranean oil-bearing formations comprising carbonate rocks with an aqueous composition comprising cationic ammonium salts comprising four hydrocarbon radicals wherein at least one of the hydrocarbon radicals is substituted by an OH-group. The process may be a process for enhanced oil recovery, fracturing, acidizing or antiscale treatment.