Patents by Inventor William G. Gill

William G. Gill 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).

  • Technique for electrically heating formations
    Patent number: 4951748
    Abstract: A technique of heating a subterranean oil bearing formation comprises determining a thermal harmonic frequency of the formation and applying a form of alternating current to the formation that includes the thermal harmonic frequency to increase the temperature of the formation. Heated oil is produced from the formation. A standard three phase ac power source is converted to dc and then chopped to single phase ac so substantially all of the purchased power can be delivered to the well.
    Type: Grant
    Filed: January 30, 1989
    Date of Patent: August 28, 1990
    Inventors: William G. Gill, Hugh Gill