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. 21, 2023
Filed:
Jan. 22, 2020
Dow Global Technologies Llc, Midland, MI (US);
Praveen Agarwal, Pearland, TX (US);
Dow Global Technologies LLC, Midland, MI (US);
Abstract
Coated proppant particles are prepared by coating the particles with a coating composition that includes at least one polyisocyanate and at least one ingredient selected from i) an isocyanate trimerization catalyst, ii) a carbodiimide catalyst, iii) an alcohol, iv) a polyamine and v) an alkanolamine, and curing the coating composition. Starch is present during at least part of the curing step, such that the starch becomes embedded in at least a portion of the cured coating. The coating composition cures rapidly at moderate temperatures, and bonds to itself well under conditions of heat and pressure as are experienced by the particles in subterranean formations.