Patents by Inventor Michael Sewell

Michael Sewell 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).

  • Plunger lift mechanism
    Patent number: 8347955
    Abstract: Method and apparatus for a plunger lift mechanism with a main channel disposed between a first and second valve. The first valve is closed by engaging a sealing member to a first seat at a proximal end of the main channel and the second valve consequently closes to with a sealing member engaging a second seat at a distal end of the main channel. An amount of pressure accumulates on a first side of the plunger lift to overcome a pressure on a second side of the plunger lift to force the plunger lift to traverse a well bore and evacuate any fluids present above the plunger lift.
    Type: Grant
    Filed: February 5, 2010
    Date of Patent: January 8, 2013
    Assignee: 4S Oilfield Technologies, LLC
    Inventors: Michael Sewell, Amy C. Stephens