US 12,275,893 B2
Methods for hydrocarbon recovery
Do Hoon Kim, Katy, TX (US); Dennis Arun Alexis, Richmond, VA (US); Varadarajan Dwarakanath, Houston, TX (US); David Espinosa, Houston, TX (US); Taimur Malik, Houston, TX (US); Logan Jackson, Norcross, GA (US); Tom Lynch, Roswell, GA (US); Ronald Robinson, Newnan, GA (US); Frances Fournier, Marietta, GA (US); Hong Yang, Atlanta, GA (US); and Sukhjit Aujla, The Woodlands, TX (US)
Assigned to CHEVRON U.S.A. INC., San Ramon, CA (US)
Filed by CHEVRON U.S.A. INC., San Ramon, CA (US)
Filed on Feb. 9, 2024, as Appl. No. 18/437,915.
Application 18/437,915 is a continuation of application No. 18/336,457, filed on Jun. 16, 2023, abandoned.
Application 18/336,457 is a continuation of application No. 17/981,733, filed on Nov. 7, 2022, abandoned.
Application 17/981,733 is a continuation of application No. 17/395,933, filed on Aug. 6, 2021, abandoned.
Application 17/395,933 is a continuation of application No. 16/851,875, filed on Apr. 17, 2020, granted, now 11,084,973, issued on Aug. 10, 2021.
Application 16/851,875 is a continuation of application No. 15/372,168, filed on Dec. 7, 2016, granted, now 10,626,320, issued on Apr. 21, 2020.
Claims priority of provisional application 62/264,776, filed on Dec. 8, 2015.
Prior Publication US 2024/0247180 A1, Jul. 25, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. C09K 8/588 (2006.01); C09K 8/584 (2006.01); E21B 43/20 (2006.01)
CPC C09K 8/588 (2013.01) [C09K 8/584 (2013.01); E21B 43/20 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A method for preparing an inverted polymer solution comprising
providing a liquid polymer (LP) composition comprising:
one or more water soluble (co)polymers;
one or more hydrophobic liquids;
one or more emulsifier surfactants; and
one or more inverting surfactants;
inverting the LP composition in an aqueous fluid in a single step by diluting the LP composition in the aqueous fluid in an in-line mixer having a mixer inlet and a mixer outlet to provide an inverted polymer solution having a concentration of water soluble (co)polymer of from 50 to 15,000 ppm;
wherein the inverted polymer solution has a filter ratio of 1.5 or less at 15 psi using a 1.2 m filter; and
wherein the inverted polymer solution is used in an enhanced oil recovery (EOR) operation.