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. 03, 2018
Filed:
Feb. 26, 2015
Applicant:
Self-suspending Proppant Llc, Cambridge, MA (US);
Inventors:
David S. Soane, Chestnut Hill, MA (US);
Robert P. Mahoney, Newbury, MA (US);
Marie K. Herring, Watertown, MA (US);
Kevin P. Kincaid, Salt Lake City, UT (US);
Rosa Casado Portilla, Peabody, MA (US);
Assignee:
SELF-SUSPENDING PROPPANT, LLC, Chesterland, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K 8/80 (2006.01); E21B 43/267 (2006.01);
U.S. Cl.
CPC ...
C09K 8/805 (2013.01);
Abstract
A self-suspending proppant comprises a proppant particle substrate carrying a coating of an anionic hydrogel-forming polymer. The detrimental effect of calcium and other divalent ions on the ability of the proppant to swell when contacted with water is reduced by including a calcium binding agent in the proppant.