Patents by Inventor Larry D. Johansen

Larry D. Johansen 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).

  • Method for patching casing leaks
    Patent number: 4754810
    Abstract: A process for sealing casing leaks comprises cleaning out the annulus between the tubing and the casing, situating a gelable mixture in the annulus at the loci of the leak in the casing, pressuring the mixture through the leak into the formation and effecting gelation of the mixture. Optionally, the remaining gelable mixture may be circulated out of the annulus. Gelable mixtures can be comprised of various organic and inorganic gel polymers.
    Type: Grant
    Filed: March 16, 1987
    Date of Patent: July 5, 1988
    Assignee: Conoco Inc.
    Inventors: Karl E. Bennett, Jeff J. Jurinak, Chandra L. Mowery, Walter M. MacKinlay, Larry D. Johansen