Patents by Inventor Mac Seheult

Mac Seheult 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).

  • Non-pyruvylated xanthan in oil field applications utilizing high density calcium-based brines
    Patent number: 6573221
    Abstract: A drilling fluid comprising a pyruvate-free xanthan, which may be an acetate-free pyruvate-free xanthan, and a high density calcium-based brine. Preferably the pyruvate-free xanthan is a genetically prepared pyruvate-free xanthan. A process for recovering crude oil from an oil-bearing subterranean formation by drilling the formation and using a drilling fluid comprising a pyruvate-free gum and a high density calcium-based brine.
    Type: Grant
    Filed: March 21, 2001
    Date of Patent: June 3, 2003
    Assignee: CP Kelco U.S., Inc.
    Inventors: Todd Talashek, Mac Seheult, Trish Carter, Reinaldo Navarrete, Helena Chang