Now showing items 1-4 of 4
Quaternary ammonium surfactants
(United States Patent and Trademark Office, 2015-12-08)
Provided herein, inter alia, are novel compositions and methods having application in the field of enhanced oil recovery. In particular, the quaternary ammonium compounds and mixtures thereof presented herein can be used, ...
Compositions and methods for controlling the stability of ethersulfate surfactants at elevated temperatures
(United States Patent and Trademark Office, 2015-08-18)
The present invention describes the method of making an ether sulfate surfactant solution hydrolytically stable by adding one or more alkalinity generating agents at levels greater than 0.05%. The surfactant solutions of ...
Surfactant-less alkaline-polymer formulations for recovering reactive crude oil
(United States Patent and Trademark Office, 2015-11-03)
Compositions and methods for oil recovery using a surfactant-less alkaline-polymer system in hard water or hard brine is described in the instant invention. The formulation further includes a chelating agent, an alkaline ...
Short chain alkylamine alkoxylate compositions
(United States Patent and Trademark Office, 2015-09-08)
Provided herein are, inter alia, compositions including a surfactant and a novel compound useful in enhanced oil recovery. The compositions and methods provided herein may be particularly useful for oil recovery under a ...