Patents by Inventor Robert Angus CAMPBELL

Robert Angus CAMPBELL 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).

  • Fluid seal with swellable material packing
    Patent number: 9085949
    Abstract: The present disclosure provides a casing seal for a wellhead, including a casing with an internal surface having an annular groove therein. A fluid seal is disposed in the annular groove and includes an internal bead for sealing against a cylindrical surface of an inner case or tube. A swellable material is disposed within the annular groove and surrounds the fluid seal. An energizing port is in communication with the annular groove for delivering fluid to the swellable material to cause the swellable material to expand and further load the fluid seal.
    Type: Grant
    Filed: September 4, 2012
    Date of Patent: July 21, 2015
    Assignee: Freudenberg Oil & Gas, LLC
    Inventors: Robert Angus Campbell, Richard T. Schmidt
  • Fluid Seal with Swellable Material Packing
    Publication number: 20140060805
    Abstract: The present disclosure provides a casing seal for a wellhead, including a casing with an internal surface having an annular groove therein. A fluid seal is disposed in the annular groove and includes an internal bead for sealing against a cylindrical surface of an inner case or tube. A swellable material is disposed within the annular groove and surrounds the fluid seal. An energizing port is in communication with the annular groove for delivering fluid to the swellable material to cause the swellable material to expand and further load the fluid seal.
    Type: Application
    Filed: September 4, 2012
    Publication date: March 6, 2014
    Applicant: FREUDENBERG OIL & GAS, LLC
    Inventors: Robert Angus CAMPBELL, Richard T. Schmidt