Patents by Inventor Bob L. Carlberg

Bob L. Carlberg 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).

  • Inhibition of reservoir scale
    Patent number: 4860829
    Abstract: Scaling of a production well in a non-carbonate subterranean reservoir is inhibited by injecting into the reservoir a mixture of a phosphonate inhibitor and a metal chelate where the metal chelate has a lower stability constant (Ke) than the phosphonate inhibitor.
    Type: Grant
    Filed: November 21, 1988
    Date of Patent: August 29, 1989
    Assignee: Conoco Inc.
    Inventors: Bob L. Carlberg, Nicholas O. Wolf, Kenneth W. Pober, William D. Nash
  • Permanent cobalt catalyst for sulfite oxygen scavenging
    Patent number: 4231869
    Abstract: In the recovery of hydrocarbons from petroliferous formations wherein water is injected into the formation through a borehole, oxygen is scavenged from water employed in recovery applications requiring low oxygen levels by mixing with a source of sulfite ion, said mixture then being passed over a cation exchange resin on which a cobalt ion or other metallic catalyst is adsorbed. The catalyst increases the reaction rate of the sulfite ion and the oxygen to form sulfate ion, while the resin maintains the cobalt in place.
    Type: Grant
    Filed: March 19, 1979
    Date of Patent: November 4, 1980
    Assignee: Conoco, Inc.
    Inventors: Bob L. Carlberg, Robert A. Hart