Patents by Inventor William W. Webster

William W. Webster 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).

  • Methods of preventing well cement stress failure
    Patent number: 5696059
    Abstract: Improved methods of cementing in a well are provided whereby stress failures in the resulting set cement are prevented or reduced. The methods basically comprise the steps of placing a foamed cement composition in a zone in the well to be cemented which when set has sufficient elastic properties to resist stress failure comprised of hydraulic cement, water, a gas present in an amount in the range of from about 5% to about 75% by volume of the cement composition and a foaming agent, and then allowing the cement composition to set across the zone.
    Type: Grant
    Filed: January 31, 1996
    Date of Patent: December 9, 1997
    Assignee: Halliburton Company
    Inventors: David D. Onan, James E. Griffith, William W. Webster
  • Method for selecting a demulsifier for breaking a water-in-oil emulsion
    Patent number: 4134799
    Abstract: A method for selecting a demulsifier for breaking a water-in-oil emulsion employs at least two electrodes to be immersed in a plurality of emulsion samples, each having a different demulsifier added. The current flow between the electrodes is recorded for each sample. The demulsifier producing the most rapid rate of change of current flow is identified as the most effective demulsifier in breaking the water-in-oil emulsion.
    Type: Grant
    Filed: July 18, 1977
    Date of Patent: January 16, 1979
    Assignee: Mobil Oil Corporation
    Inventors: Wallace B. Allen, John W. Harrell, William W. Webster