Patents by Inventor Steven Villareal

Steven Villareal 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).

  • DOWNHOLE FLUID PUMPING APPARATUS AND METHOD
    Publication number: 20050115716
    Abstract: A downhole fluid pump including a pump chamber, and a piston disposed in the pump chamber so that the piston will move in one selected from a charge stroke and a discharge stroke when the piston is exposed to a differential pressure. The downhole fluid pump may form part of a formation evaluation while drilling tool.
    Type: Application
    Filed: December 1, 2003
    Publication date: June 2, 2005
    Inventors: Reinhart Ciglenec, Paal Kibsgaard, Steven Villareal