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. 05, 2022
Filed:
Jan. 21, 2020
Applicant:
King Fahd University of Petroleum and Minerals, Dhahran, SA;
Inventors:
Muhammad Shahzad Kamal, Dhahran, SA;
S. M. Shakil Hussain, Dhahran, SA;
Mobeen Murtaza, Dhahran, SA;
Mohamed Mahmoud, Dhahran, SA;
Assignee:
King Fahd University of Petroleum and Minerals, Dhahran, SA;
Primary Examiner:
Int. Cl.
CPC ...
E21B 21/02 (2006.01); C09K 8/60 (2006.01);
U.S. Cl.
CPC ...
C09K 8/604 (2013.01); C09K 2208/06 (2013.01);
Abstract
Amidoamine-based gemini surfactants having dual chains connected via an arylene or heteroarylene linker. Each chain contains a quaternary ammonium head group and an ethoxylated alkyl tail. A water-based drilling fluid containing the gemini surfactant is also provided. As examined by linear swelling and free swelling tests, the gemini surfactant is effective in reducing clay swelling.