Patents by Inventor Donald J. Barrus

Donald J. Barrus 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).

  • Progressive cavity pump with flexible coupling
    Patent number: 5501580
    Abstract: A progressive cavity pump is located in a well and driven by a downhole electrical motor. A connector locates between the drive shaft of the motor and the rotor of the pump. The connector includes a connector shaft which has a lower end restrained on a longitudinal axis. The upper end orbits with the lower end of the rotor. The connector shaft has splined ends that are received in couplings. The connector shaft flexes during the orbiting movement.
    Type: Grant
    Filed: May 8, 1995
    Date of Patent: March 26, 1996
    Assignee: Baker Hughes Incorporated
    Inventors: Donald J. Barrus, Steven K. Tetzlaff
  • High pressure automatic mud saver valve
    Patent number: 5253704
    Abstract: The disclosure relates to an improved diaphragm type mud saver valve, commonly referred to as a Kelley valve, which closes automatically to prevent loss and spilling of drilling mud. The improved valve can withstand very high drilling and pump pulsation pressures, for example, the pressures required for drilling wells over 20,000 feet in depth and mud pressures can exceed 15,000 p.s.i. The disclosure prevents the formation of gas pockets by providing gas escape openings and a clearance space between the support and backup element to prevent the extrusion of the diaphragm material through the small openings in a backup sleeve thus extending the life of the diaphragm and allowing proper diaphragm seating.
    Type: Grant
    Filed: November 13, 1990
    Date of Patent: October 19, 1993
    Assignee: KOB, Inc.
    Inventors: Reginald J. Barrus, Donald J. Barrus, Theodore A. Kritikos, John W. Owensby
  • High pressure automatic kelly valve
    Patent number: 4969513
    Abstract: A mud saver valve for automatically closing to prevent loss and spilling of drilling mud. The valve contains a diaphragm, rigid backup means and diaphragm support means so that the valve can be used in high pressure wells.
    Type: Grant
    Filed: September 22, 1989
    Date of Patent: November 13, 1990
    Assignee: KOB, Inc.
    Inventors: Reginald J. Barrus, Donald J. Barrus, Theodore A. Kritikos, John W. Owensby
  • Progressive cavity pump with flexible coupling
    Patent number: RE37995
    Abstract: A progressive cavity pump located in a well and driven by a downhole electrical motor. A connector locates between the drive shaft of the motor and the rotor of the pump. The connector includes a connector shaft which has a lower end restrained on a longitudinal axis. The upper end orbits with the lower end of the rotor. The connector shaft has splined ends that are received in couplings. The connector shaft flexes during the orbiting movement.
    Type: Grant
    Filed: September 17, 1997
    Date of Patent: February 18, 2003
    Assignee: Baker Hughes Incorporated
    Inventors: Donald J. Barrus, Steven K. Tetzlaff