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:
Jun. 08, 2021
Filed:
Oct. 31, 2018
Applicants:
Qinglin Wu, Baton Rouge, LA (US);
Meichun LI, Baton Rouge, LA (US);
Inventors:
Qinglin Wu, Baton Rouge, LA (US);
Meichun Li, Baton Rouge, LA (US);
Assignee:
Board of Supervisors of Louisiana State University and Agricultural and Mechanical College, Baton Rouge, LA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K 8/20 (2006.01); C09K 8/24 (2006.01); C09K 8/14 (2006.01);
U.S. Cl.
CPC ...
C09K 8/206 (2013.01); C09K 8/145 (2013.01); C09K 8/24 (2013.01); C09K 2208/08 (2013.01); C09K 2208/10 (2013.01);
Abstract
Bentonite (or other clay) water-based drilling fluids incorporating functionalized cellulose nanocrystals are disclosed. Cellulose nanocrystals are modified with tailored surface charges or tailored levels of salt-tolerant polymer grafting, and combined with bentonite (or other clay) nanoplatelets in an aqueous suspension. Thermal performance of drilling fluids can also be enhanced by surface grafting of thermally functional polymers onto cellulose nanocrystals.