Patents by Inventor R. Colvard

R. Colvard 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).

  • Retractable joint and cementing shoe for use in completing a wellbore
    Publication number: 20060185855
    Abstract: An improved method and/or apparatus for completing a wellbore is provided. In one embodiment, a method of lining a pre-drilled wellbore is provided. The method includes the act of providing a casing assembly, the casing assembly including a string of casing; and a retractable joint comprising an inner tubular and an outer tubular. The method further includes the acts of running the casing assembly into the pre-drilled wellbore and actuating the retractable joint, thereby reducing the length of the casing assembly through movement between the inner and outer tubulars.
    Type: Application
    Filed: January 30, 2006
    Publication date: August 24, 2006
    Inventors: John Jordan, James Martens, R. Colvard, Brent Lirette, Gregory Galloway, David Brunnert