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. 24, 2020
Filed:
Jul. 14, 2017
Applicant:
King Fahd University of Petroleum and Minerals, Dhahran, SA;
Inventors:
Mohamed Mahmoud, Dhahran, SA;
Salah El-Din Elkatatny, Dhahran, SA;
Assignee:
King Fahd University of Petroleum and Minerals, Dhahran, SA;
Primary Examiner:
Int. Cl.
CPC ...
C09K 8/74 (2006.01); C09K 8/52 (2006.01); E21B 37/00 (2006.01); C09K 8/524 (2006.01); C09K 8/03 (2006.01); C09K 8/62 (2006.01);
U.S. Cl.
CPC ...
C09K 8/74 (2013.01); C09K 8/52 (2013.01); C09K 8/524 (2013.01); E21B 37/00 (2013.01); C09K 8/03 (2013.01); C09K 8/62 (2013.01); C09K 2208/24 (2013.01); C09K 2208/26 (2013.01);
Abstract
The present invention relates to a composition for dissolving an oil-based filter cake in a wellbore, and a single-step method of use. The composition comprises a chelating agent, a converting agent, a polymer removal agent, a mutual solvent, and a surfactant. The present invention also relates to a multi-step method of dissolving an oil-based filter cake using similar components. Both single-step and multistep methods may be used to dissolve oil-based filter cakes comprising barite as a weighting material.