Patents by Inventor Karl E. Gillenwater

Karl E. Gillenwater 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).

  • Acid soluble packer and workover fluid
    Patent number: 4012328
    Abstract: A well completion and packer fluid additive consisting essentially of carboxymethyl cellulose crosslinked with an inorganic chromium compound. The fluids prepared with this procedure have temperature stability to 250.degree. F., excellent resistance to contamination, stability in electrolyte solutions such as KCl and CaCl.sub.2 and upon acidizing the fluid retains less the 3% residue.
    Type: Grant
    Filed: March 3, 1975
    Date of Patent: March 15, 1977
    Assignee: Dresser Industries, Inc.
    Inventors: Melvel P. Hunter, Karl E. Gillenwater, Henry J. Warren