Patents by Inventor Johnna E. Oakley

Johnna E. Oakley 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).

  • Brine viscosification
    Patent number: 5480863
    Abstract: A process for increasing the viscosity of a zinc compound-containing brine which can be used for workover and completion fluids in oil field operations is provided. The process comprises contacting the zinc compound-containing brine with a polymer which comprises repeating units derived from an unsaturated amide having the formula of CH.sub.2 .dbd.CH--R--C(O)--NH.sub.2 and a vinylic sulfur compound selected from the group consisting of CH.sub.2 .dbd.CH--R'--SO.sub.3 M, CH.sub.2 .dbd.CH--R"--C(O)--N(H)--R"'--SO.sub.2 M, and mixtures thereof; wherein M is selected from the group consisting of hydrogen, an alkali metal, and combinations thereof; and R is selected from the group consisting of hydrogen, a hydrocarbyl radical having from 1 to about 20 carbon atoms, and combinations thereof.
    Type: Grant
    Filed: February 16, 1993
    Date of Patent: January 2, 1996
    Assignee: Phillips Petroleum Company
    Inventors: Johnna E. Oakley, Kelly B. Fox, Alvin Evans, Jr., Wayne S. Stewart