Patents by Inventor Dick Rubbo

Dick Rubbo 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).

  • Patent number: 5044441
    Abstract: A pack-off tubing hanger is shown for use in a tubing string extending from a well surface location to a downhole location within a well casing. The hanger body includes an external packing element and gripping slips which support the hanger body within the surrounding casing. A longitudinal passageway communicates hydraulic pressure from the lower end of the hanger to a setting chamber to hydraulically set the packing elements and actuate the gripping slips. A companion concentric tubing anchor is carried within the internal bore of the hanger and connects the hanger to the tubing string leading to the well surface.
    Type: Grant
    Filed: August 28, 1990
    Date of Patent: September 3, 1991
    Assignee: Baker Hughes Incorporated
    Inventors: Dick Rubbo, Mike Luke, Brett Bouldin, Frank Mooney