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:
Nov. 20, 2018
Filed:
Mar. 23, 2015
Applicants:
Basf SE, Ludwigshafen, DE;
Basf Corporation, Florham Park, NJ (US);
Inventors:
Assignees:
BASF SE, , DE;
BASF Corporation, Florham Park, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 43/26 (2006.01); C09K 8/74 (2006.01); C09K 8/60 (2006.01); E21B 43/25 (2006.01);
U.S. Cl.
CPC ...
C09K 8/74 (2013.01); C09K 8/602 (2013.01); E21B 43/25 (2013.01); C09K 2208/30 (2013.01); E21B 43/26 (2013.01);
Abstract
Method of increasing the permeability in subterranean formations comprising rock that is soluble by acid, in particular carbonatic formations, using a formulation comprising at least an acid and a retarding surfactant which is an amphoteric surfactant. Preferably, the acid comprises methanesulfonic acid.