Patents by Inventor Dan D. Lawrence

Dan D. Lawrence 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).

  • Silicate activated lignosulfonate gel treatments of conductive zones
    Patent number: 4275789
    Abstract: Highly conductive subterranean zones are treated with aqueous fluids containing gel-forming amounts of water-soluble lignosulfonate and silicate. Suitable treating fluids contain about 2 to about 5 weight percent sodium or ammonium lignosulfonate and sodium silicate at a weight ratio of SiO.sub.2 to lignosulfonate of about 0.2 to about 1.
    Type: Grant
    Filed: August 27, 1979
    Date of Patent: June 30, 1981
    Assignee: Standard Oil Company (Indiana)
    Inventors: Dan D. Lawrence, Betty J. Felber
  • Formation treatment with silicate activated lignosulfonate gel
    Patent number: 4257813
    Abstract: Highly conductive zones in subterranean formations are treated with aqueous fluids containing gel-forming amounts of water-soluble lignosulfonate and silicate. Suitable treating fluids contain about 2 to about 5 weight percent sodium or ammonium lignosulfonate and sodium silicate at a weight ratio of SiO.sub.2 to lignosulfonate of about 0.2 to about 1.
    Type: Grant
    Filed: April 27, 1979
    Date of Patent: March 24, 1981
    Assignee: Standard Oil Company (Indiana)
    Inventors: Dan D. Lawrence, Betty J. Felber