Patents by Inventor Lonnie Dunn

Lonnie Dunn 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).

  • Active intake pressure control of downhole pump assemblies
    Patent number: 7793683
    Abstract: Progressive cavity pump assemblies including one or more mechanisms adapted to regulate intake pressure of the main pump between a minimum intake pressure and a maximum intake pressure. In one embodiment, the mechanism is a sealing member configured to open at a threshold pressure to discharge wellbore fluid and close after falling below the threshold pressure. In an alternative embodiment, the mechanism may be a regulator assembly that adjusts the volume of output from the charge pump to the interconnect according to the pressure in the interconnect.
    Type: Grant
    Filed: October 11, 2006
    Date of Patent: September 14, 2010
    Assignee: Weatherford/Lamb, Inc.
    Inventors: Evan Noble, Roland Moneta, Lonnie Dunn
  • ACTIVE INTAKE PRESSURE CONTROL OF DOWNHOLE PUMP ASSEMBLIES
    Publication number: 20080095643
    Abstract: Progressive cavity pump assemblies including one or more mechanisms adapted to regulate intake pressure of the main pump between a minimum intake pressure and a maximum intake pressure. In one embodiment, the mechanism is a sealing member configured to open at a threshold pressure to discharge wellbore fluid and close after falling below the threshold pressure. In an alternative embodiment, the mechanism may be a regulator assembly that adjusts the volume of output from the charge pump to the interconnect according to the pressure in the interconnect.
    Type: Application
    Filed: October 11, 2006
    Publication date: April 24, 2008
    Applicant: WEATHERFORD/LAMB, INC.
    Inventors: EVAN NOBLE, ROLAND MONETA, LONNIE DUNN
  • ACTIVE INTAKE PRESSURE CONTROL OF DOWNHOLE PUMP ASSEMBLIES
    Publication number: 20080087332
    Abstract: Progressive cavity pump assemblies including one or more mechanisms adapted to regulate intake pressure of the main pump between a minimum intake pressure and a maximum intake pressure. In one embodiment, the mechanism is a sealing member configured to open at a threshold pressure to discharge wellbore fluid and close after falling below the threshold pressure. In an alternative embodiment, the mechanism may be a regulator assembly that adjusts the volume of output from the charge pump to the interconnect according to the pressure in the interconnect.
    Type: Application
    Filed: October 11, 2006
    Publication date: April 17, 2008
    Applicant: WEATHERFORD/LAMB, INC.
    Inventors: EVAN NOBLE, ROLAND MONETA, LONNIE DUNN
  • Self compensating adjustable fit progressing cavity pump for oil-well applications with varying temperatures
    Patent number: 6457958
    Abstract: The present invention provides an adjustable rotor and/or stator, so that the interference fit and/or clearance can be adjusted. The rotor and/or stator are tapered to provide a difference in fit between the rotor and stator by longitudinal adjustment of their relative position. The relative longitudinal adjustment is achieved in response to a change in temperature and is matched to the taper angle of the stator/rotor to maintain a desired interference fit.
    Type: Grant
    Filed: March 27, 2001
    Date of Patent: October 1, 2002
    Assignee: Weatherford/Lamb, Inc.
    Inventor: Lonnie Dunn