Patents by Inventor Cecil M. Smithey

Cecil M. Smithey 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 of well drilling and composition therefor
    Patent number: 3986964
    Abstract: A non-damaging well drilling fluid contains a polysaccharide, a lignosulfonate, chrome sulfate, a pH modifier and, preferably, graded calcium carbonate and starch. The fluid is effective to seal off the well bore essentially immediately and is non-damaging in that it causes little permanent plugging of the formation by loss of the drilling fluid solids to the formation.
    Type: Grant
    Filed: June 11, 1973
    Date of Patent: October 19, 1976
    Assignee: Texas Brine Corporation
    Inventor: Cecil M. Smithey