Patents by Inventor Arne Olay Fredheim

Arne Olay Fredheim 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).

  • Natural gas liquefaction process
    Patent number: 7386996
    Abstract: The invention relates to a natural gas liquefaction process and particularly to one suited to use offshore. The invention provides a natural gas liquefaction apparatus wherein a carbon dioxide based pre-cooling circuit is provided in a cascade arrangement with a main cooling circuit. The invention also extends to a natural gas liquefaction apparatus wherein a main cooling circuit uses as a refrigerant a gas stream, at least a portion of which is derived from a raw natural gas source.
    Type: Grant
    Filed: March 15, 2001
    Date of Patent: June 17, 2008
    Assignee: Den Norske Stats Oljeselskap A.S.
    Inventors: Arne Olay Fredheim, Pentti Paurola
  • Natural gas liquefaction process
    Publication number: 20030089125
    Abstract: The invention relates to a natural gas liquefaction process and particularly to one suited to use offshore. The invention provides a natural gas liquefaction apparatus wherein a carbon dioxide based pre-cooling circuit is provided in a cascade arrangement with a main cooling circuit. The invention also extends to a natural gas liquefaction apparatus wherein a main cooling circuit uses as a refrigerant a gas stream, at least a portion of which is derived from a raw natural gas source.
    Type: Application
    Filed: December 23, 2002
    Publication date: May 15, 2003
    Inventors: Arne Olay Fredheim, Pentti Paurola