Patents by Inventor Sharon A. Stonecipher

Sharon A. Stonecipher 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).

  • Process for selectively reducing the permeability of a subterranean sandstone formation
    Patent number: 4301867
    Abstract: A caustic aqueous solution having an amphoteric metal ion dissolved therein is injected into a subterranean sandstone formation wherein the caustic interacts with the sandstone formation to form caustic soluble silicates. The amphoteric metal ion reacts with the caustic soluble silicates to form an amphoteric metal silicate precipitate which preferentially reduces the permeability of the relatively highly permeable zones of the formation thereby improving conformance and flow profiles of fluids subsequently injected into or produced from the formation.
    Type: Grant
    Filed: June 30, 1980
    Date of Patent: November 24, 1981
    Assignee: Marathon Oil Company
    Inventors: Robert D. Sydansk, Paul R. Gucwa, Sharon A. Stonecipher