Patents by Inventor Randall S. Williford

Randall S. Williford 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).

  • Pressure Actuated Piston Type Casing Fill-up Valve and Methods of Use Thereof
    Publication number: 20100051290
    Abstract: The present disclosure describes a method and apparatus for filling casing and/or a casing string and provides for the flow back of such fluids in a wellbore during casing running operations. The tool comprises a piston valve which is automatically pressure actuated. Thus, the valve will open and close without manual and/or outside mechanical intervention. Further, the design and construction of the piston valve helps to substantially reduce erosive wear to the piston valve and its components.
    Type: Application
    Filed: August 31, 2008
    Publication date: March 4, 2010
    Inventor: Randall S. Williford