Patents by Inventor Douglas L. Walton

Douglas L. Walton 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).

  • Diversion treatment method
    Patent number: 6367548
    Abstract: Methods and compositions for stimulating multiple intervals in wells by diverting well treatment fluids into multiple intervals by alternately displacing diverting agent from the annulus into a subterranean formation and displacing treatment fluid from a tubing string into the subterranean formation.
    Type: Grant
    Filed: March 3, 2000
    Date of Patent: April 9, 2002
    Assignees: BJ Services Company, Ocean Energy Resources, Inc.
    Inventors: Donald L. Purvis, David D. Cramer, David D. Smith, Douglas L. Walton