US 12,018,211 B2
Inverting surfactants for inverse emulsions
Stanley Gunawan, The Woodlands, TX (US); Zhihua Zhang, Singapore (SG); Shaopeng Zhang, The Woodlands, TX (US); Igor Pimkov, Spring, TX (US); Zhenxing Cheng, Shanghai (CN); and Qi Qu, Tomball, TX (US)
Assigned to RHODIA OPERATIONS, Lyons (FR)
Appl. No. 17/919,494
Filed by RHODIA OPERATIONS, Lyons (FR)
PCT Filed Jun. 9, 2020, PCT No. PCT/CN2020/095084
§ 371(c)(1), (2) Date Oct. 17, 2022,
PCT Pub. No. WO2021/248305, PCT Pub. Date Dec. 16, 2021.
Prior Publication US 2023/0357629 A1, Nov. 9, 2023
Int. Cl. C09K 8/82 (2006.01); C09K 8/36 (2006.01); C09K 8/60 (2006.01); C09K 8/88 (2006.01); E21B 43/16 (2006.01)
CPC C09K 8/82 (2013.01) [C09K 8/36 (2013.01); C09K 8/602 (2013.01); C09K 8/882 (2013.01); E21B 43/16 (2013.01); C09K 2208/28 (2013.01)] 17 Claims
 
1. A friction reducing treatment solution comprising:
a water-in-oil emulsion comprising an oil phase and an aqueous phase,
wherein the oil phase is a continuous phase comprising an inert hydrophobic liquid;
wherein the aqueous phase is present as dispersed distinct particles in the oil phase and comprises water and a water soluble polymer, wherein the water soluble polymer comprises from 5 to 40 percent by weight of the water-in-oil emulsion; and
an inverting surfactant present in an amount less than 5 percent by weight of the water-in-oil emulsion and comprising an alkyl propylene diamine and an ethoxylated alcohol.
 
8. A method of treating a portion of a subterranean formation, comprising:
a. inverting a water-in-oil emulsion having an oil phase and an aqueous phase to provide a treatment fluid, wherein the oil phase is a continuous phase comprising an inert hydrophobic liquid; wherein the aqueous phase is present as dispersed distinct particles in the oil phase and comprises water and a water soluble polymer, wherein the water soluble polymer comprises from 5 to 40 percent by weight of the water-in-oil emulsion and an inverting surfactant present in an amount less than 5 percent by weight of the water-in-oil emulsion and comprising an alkyl propylene diamine and an ethoxylated alcohol; and
b. introducing the treatment fluid into the portion of the subterranean formation.