US 11,884,879 B2
Compositions for use in oil and gas operations
Dennis A. Alexis, Richmond, TX (US); Gayani Pinnawala Arachchilage, Katy, TX (US); Varadarajan Dwarakanath, Houston, TX (US); Do Hoon Kim, Katy, TX (US); Taimur Malik, Houston, TX (US); Gregory A. Winslow, Houston, TX (US); and Aaron Wilhelm, Fulsher, TX (US)
Assigned to CHEVRON U.S.A. INC., San Ramon, CA (US); and CHEVRON ORONITE COMPANY LLC, San Ramon, CA (US)
Filed by CHEVRON U.S.A. INC., San Ramon, CA (US); and Chevron Oronite Company LLC, San Ramon, CA (US)
Filed on Feb. 14, 2022, as Appl. No. 17/670,988.
Application 17/670,988 is a continuation of application No. 16/262,211, filed on Jan. 30, 2019, granted, now 11,248,160.
Claims priority of provisional application 62/624,092, filed on Jan. 30, 2018.
Prior Publication US 2022/0372363 A1, Nov. 24, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. C09K 8/52 (2006.01); C09K 8/584 (2006.01); C09K 8/588 (2006.01); C09K 8/68 (2006.01); F17D 1/16 (2006.01); C09K 8/88 (2006.01); E21B 43/26 (2006.01); C08L 33/26 (2006.01); C09K 8/60 (2006.01); C08K 5/09 (2006.01); C08K 5/37 (2006.01)
CPC C09K 8/584 (2013.01) [C08L 33/26 (2013.01); C09K 8/52 (2013.01); C09K 8/588 (2013.01); C09K 8/602 (2013.01); C09K 8/68 (2013.01); C09K 8/88 (2013.01); E21B 43/26 (2013.01); F17D 1/16 (2013.01); C08K 5/09 (2013.01); C08K 5/37 (2013.01); C09K 2208/28 (2013.01)] 21 Claims
 
1. A concentrated liquid surfactant composition comprising:
(a) a surfactant package in an amount of from 0.2% to 98% by weight, based on the total weight of the concentrated liquid surfactant composition;
(b) a co-solvent in an amount of from greater than 0% to 95% by weight, based on the total weight of the concentrated liquid surfactant composition; and
(c) a liquid polymer (LP) composition in an amount of from 0.1% to 60% by weight, based on the total weight of the concentrated liquid surfactant composition;
wherein the surfactant composition comprises an alkyl aryl sulfonate surfactant;
wherein the concentrated liquid surfactant composition has a total water content of from 0.5% to 20% by weight, based on the total weight of the concentrated liquid surfactant composition;
wherein the concentrated liquid surfactant composition has a total additive concentration equal to the sum of the weight percent concentration of all surfactants and all co-solvents present in the concentrated liquid surfactant composition;
wherein the concentrated liquid surfactant composition has a total polymer concentration equal to the sum of the weight percent concentration of all polymers present in the concentrated liquid surfactant composition; and
wherein the weight ratio of the total additive concentration to the total polymer concentration is at least 1:1.