Patents by Inventor David N. Burdge

David N. Burdge 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).

  • Plugging a tubing/casing annulus in a wellbore with a polymer gel
    Patent number: 4730674
    Abstract: A tubing/casing annulus in a wellbore penetrating a subterranean hydrocarbon-bearing formation is plugged using a gel comprising a high molecular weight, water-soluble carboxylate-containing polymer and a chromic carboxylate complex crosslinking agent. The gel components are combined at the surface and injected into the annulus to form a continuous single-phase gel therein.
    Type: Grant
    Filed: December 22, 1986
    Date of Patent: March 15, 1988
    Assignee: Marathon Oil Company
    Inventors: David N. Burdge, Richard W. McAtee, Robert D. Sydansk