Patents by Inventor Gilbert L. Haferkamp

Gilbert L. Haferkamp has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method of increasing enhanced oil recovery by using a novel low sulfonate phase in the polymer slug
    Patent number: 4648452
    Abstract: This invention relates to a process for enhanced recovery of hydrocarbons from a subterranean hydrocarbon-bearing formation penetrated by an injection well and a production well wherein, before injection, the surfactant fluid is separated into two phases by the addition of small amounts of polymer and the portion having the higher sulfonate content is used as the surfactant slug. As an improvement we disclose the step of adding the phase of surfactant fluid with the lower sulfonate content to the polymer slug which is used to drive the surfactant fluid to further increase recovery.
    Type: Grant
    Filed: May 1, 1985
    Date of Patent: March 10, 1987
    Assignee: Texaco Inc.
    Inventors: Joseph T. Carlin, Gilbert L. Haferkamp