Patents by Inventor John Prieditis

John Prieditis 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).

  • Lignosulfonate-acrylic acid graft copolymers as sacrificial agents for carbon dioxide foaming agents
    Patent number: 6942031
    Abstract: The invention is a method for improving conformance during a carbon dioxide foam flood, which comprises injecting into the formation an aqueous solution of about 0.05% to about 5% by weight of a carbon dioxide foaming surfactant, and about 0.05% to about 5% by weight of a lignosulfonate-acrylic acid graft copolymer having about 2% to about 70% by weight of acrylic acid, and injecting into the formation carbon dioxide to sweep the hydrocarbons towards a production well for recovery.
    Type: Grant
    Filed: November 27, 1995
    Date of Patent: September 13, 2005
    Assignee: Texaco Inc.
    Inventors: George Kalfoglou, John Prieditis, Grover Starr Paulett
  • Method for improving injectivity of fluids in oil reservoirs
    Patent number: 5632336
    Abstract: A method is provided for increasing the rate of injection of flooding fluids into injection wells. A slug of polar solvent or a mixture of polar solvent and non-aqueous flooding fluid is injected into the injection well to displace aqueous and hydrocarbon liquids in the rock surrounding the injection well. Thereafter, the solvent is removed from the vicinity of the injection well by flooding fluid. The process may be repeated following each time water is injected into the injection well.
    Type: Grant
    Filed: July 28, 1994
    Date of Patent: May 27, 1997
    Assignee: Texaco Inc.
    Inventors: Phillip K. Notz, John Prieditis, James F. Stevens