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:
Feb. 27, 2018
Filed:
Oct. 29, 2015
Chevron U.s.a. Inc., San Ramon, CA (US);
Varadarajan Dwarakanath, Houston, TX (US);
Robert M. Dean, Houston, TX (US);
Do Hoon Kim, Katy, TX (US);
Dennis Arun Alexis, Houston, TX (US);
Sophany Thach, Houston, TX (US);
Taimur Malik, Houston, TX (US);
Anette Poulsen, Oyne, GB;
Sumitra Subrahmanyan, Houston, TX (US);
CHEVRON U.S.A. INC., San Ramon, CA (US);
Abstract
A method for making a polymer suspension for use in enhancing the production of oil from a formation is disclosed. In one embodiment, the method comprises mixing a powder polymer having an average molecular weight of 0.5 to 30 Million Daltons into a water soluble solvent having an HLB of greater than or equal to 8 for less than or equal to 24 hours. The water soluble solvent is selected from a group, at a weight ratio from 20:80 to 80:20. The polymer suspension is stable, pumpable, and substantially anhydrous; and it is hydrated for an injection solution in less than or equal to 4 hours, containing a polymer concentration ranging from 100 ppm to 50,000 ppm and having a filter ratio of less than or equal to 1.5 at 15 psi using a 1.2 μm filter, by mixing a sufficient amount of the polymer suspension in an aqueous fluid.