Patents Assigned to Brandywine Energy and Development Company, Inc.
  • Gas operated automatic, liquid pumping system for wells
    Patent number: 6851480
    Abstract: An improved, unattended, liquid pumping device for oil and gas wells featuring a bellows controlled flow valve that opens and closes at preset pressures. Additionally a well head receiver design that releases shut in production gas below the pumping device and provides a positive pressure differential across the pumping device prior to valve opening.
    Type: Grant
    Filed: April 8, 2002
    Date of Patent: February 8, 2005
    Assignee: Brandywine Energy and Development Company, Inc.
    Inventors: Gerald L. Swoyer, Charles H. Hunt, Paul M. Yaniga, Richard J. Bordogna