Patents by Inventor Darrin T. Patin

Darrin T. Patin 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).

  • Patent number: 7520326
    Abstract: An in-tubing or casing fracture packing assembly including a running tool, HDR sub assembly, a displaceable flow diversion valve by which a filter media slurry is pumped down the annulus of the assembly until a gravel pack is achieved. The HDR running tool allows the bottom hole assembly to be deployed without fear of premature release due to loads or manipulation during deployment, but allows for easy detachment once pumping is completed. An equalizing vent in the HDR sub assembly maintains equal pressure internally and externally. The flow diversion valve is autonomously tripped when the media has been properly placed, providing a positive indication at the surface. A portion of the assembly is removed and the packing assembly remains within the well bore after pumping is completed. An isolation seal is then placed on the sealing mandrel of the assembly and isolated to the tubing or casing wall.
    Type: Grant
    Filed: February 9, 2005
    Date of Patent: April 21, 2009
    Inventors: Ron C. Hill, Darrin T. Patin