Patents by Inventor Frederick Pheasey

Frederick Pheasey 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).

  • Sealing system and bi-directional thrust bearing arrangement for a downhole motor
    Patent number: 8181720
    Abstract: A bearing assembly for a downhole motor comprises a housing having an upper end, a lower end, a radially inner surface, and a radially outer surface. In addition, the bearing assembly comprises a mandrel rotatably disposed within the housing. Further, the bearing assembly comprises an upper seal assembly, a lower seal assembly, and a thrust bearing assembly, each radially positioned between the housing and the mandrel. The bearing assembly also comprises a lubricating fluid radially disposed between the housing and the mandrel. The lower end of the housing comprises a first check valve radially positioned between the radially inner surface and the radially outer surface of the housing. The check valve is in fluid communication with the lubricating fluid and is adapted to allow at least a portion of the lubricant to exit the bearing assembly at a predetermined pressure differential.
    Type: Grant
    Filed: June 25, 2010
    Date of Patent: May 22, 2012
    Assignee: National Oilwell Varco, L.P.
    Inventors: Jonathan Ryan Prill, Frederick Pheasey
  • Sealing System and Bi-Directional Thrust Bearing Arrangement for a Downhole Motor
    Publication number: 20100326730
    Abstract: A bearing assembly for a downhole motor comprises a housing having an upper end, a lower end, a radially inner surface, and a radially outer surface. In addition, the bearing assembly comprises a mandrel rotatably disposed within the housing. Further, the bearing assembly comprises an upper seal assembly, a lower seal assembly, and a thrust bearing assembly, each radially positioned between the housing and the mandrel. The bearing assembly also comprises a lubricating fluid radially disposed between the housing and the mandrel. The lower end of the housing comprises a first check valve radially positioned between the radially inner surface and the radially outer surface of the housing. The check valve is in fluid communication with the lubricating fluid and is adapted to allow at least a portion of the lubricant to exit the bearing assembly at a predetermined pressure differential.
    Type: Application
    Filed: June 25, 2010
    Publication date: December 30, 2010
    Applicant: NATIONAL OILWELL VARCO, L.P.
    Inventors: Jonathan Ryan Prill, Frederick Pheasey