Patents by Inventor James Dennis Brugman

James Dennis Brugman 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).

  • Blowout preventers and methods of use
    Patent number: 8066070
    Abstract: Methods and apparatuses for severing a wellbore tubular, the apparatus, in certain aspects, including: a first member movable toward a tubular to be severed; a second member with a second blade disposed opposite to the first member and movable toward the tubular; a first blade on the first member having a projection projecting from a center of a blade body with point structure on the projection for puncturing the tubular and cutting surfaces on the projection for cutting the tubular; and cutting surfaces, as needed, on the blade body adjacent the projection for cutting the tubular.
    Type: Grant
    Filed: September 16, 2010
    Date of Patent: November 29, 2011
    Assignee: National Oilwell Varco, L.P.
    Inventors: Frank Benjamin Springett, James Dennis Brugman