Patents by Inventor Orvel L. Stewart

Orvel L. Stewart 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).

  • Solar heat treating of well fluids
    Patent number: 4481109
    Abstract: Methods and apparatus for treatment of crude oil and well fluids and equipment used in conducting the well fluids. Solar heating means are provided to heat the well fluids to improve the treatment qualities of the fluids. A solar heater is connected to an oil well flow line to remove paraffin and demulsify at the oil well site.
    Type: Grant
    Filed: June 29, 1981
    Date of Patent: November 6, 1984
    Inventor: Orvel L. Stewart
  • Solar heat treating of well fluids
    Patent number: 4289204
    Abstract: Methods and apparatus for treatment of crude oil and well fluids and equipment used in conducting the well fluids. Solar heating means are provided to heat the well fluids to improve the treatment qualities of the fluids. A solar heater is connected to an oil well flow line to remove paraffin and demulsify at the oil well site.
    Type: Grant
    Filed: May 3, 1979
    Date of Patent: September 15, 1981
    Assignee: Sun Tech Energy Corporation
    Inventor: Orvel L. Stewart