Patents by Inventor William E. Ellington

William E. Ellington 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).

  • Controlling sulfide scavenger content of drilling fluid
    Patent number: 4840910
    Abstract: The concentration of unspent zinc-based hydrogen sulfide scavenger in an aqueous drilling fluid is controlled by selectively extracting the unspent scavenger in a solvent, such as glacial acetic acid, measuring the concentration of dissolved zinc, for example, with an X-ray fluorescence spectrograph, and utilizing the results of the measurements to proportion the extent of changes to be made in the concentration of the scavenger.
    Type: Grant
    Filed: April 20, 1987
    Date of Patent: June 20, 1989
    Assignee: Shell Oil Company
    Inventors: Stephen D. Matza, William E. Ellington, Henry C. Fleming, III
  • Controlling sulfide scavenger content of oil-based drilling fluid
    Patent number: 4805708
    Abstract: The concentration of unspent zinc-based hydrogen sulfide scavenger in an oil-based drilling fluid is controlled by selectively dissolving and extracting the unspent scavenger in a solvent, such as glacial acetic acid, separating the aqueous solution, measuring the concentration of dissolved zinc in the aqueous solution, for example, with an X-ray fluorescence spectrograph, and utilizing the results of the measurements to proportion the extent of changes in concentration of the scavenger in the drilling fluid.
    Type: Grant
    Filed: May 6, 1987
    Date of Patent: February 21, 1989
    Assignee: Shell Oil Company
    Inventors: Stephen D. Matza, William E. Ellington, Henry C. Fleming, III
  • Method for determining the amount of oil in a sponge core
    Patent number: 4787983
    Abstract: The oil lost by the core sample and captured by the sponge during sponge coring is extracted from the sponge using a solvent selected from the group consisting of cycloalkanes, ethers, and freons.
    Type: Grant
    Filed: November 17, 1987
    Date of Patent: November 29, 1988
    Assignee: Shell Oil Company
    Inventors: Rocco DiFoggio, William E. Ellington, Kailash C. B. Dangayach
  • Method for analyzing solvent extracted sponge core
    Patent number: 4785661
    Abstract: A method for quantifying the volume of oil in the fluids produced by solvent extracted sponge core distills only a portion of the solvent from the solvent/oil mixture, then determines and subtracts the remaining solvent volume to yield the actual volume of oil removed from the sponge.
    Type: Grant
    Filed: April 6, 1987
    Date of Patent: November 22, 1988
    Assignee: Shell Oil Company
    Inventors: William E. Ellington, Clayton L. Calkin
  • Controlling sulfide scavenger content of drilling fluid
    Patent number: 4658914
    Abstract: The concentration of unspent zinc-based hydrogen sulfide scavenger in an aqueous drilling fluid is controlled by selectively extracting an unspent scavenger in a solvent, such as glacial acetic acid, measuring the concentration of dissolved zinc, for example, with an X-ray fluorescence spectrograph, and utilizing the results of the measurements to proportion the extent of changes to be made in the concentration of the scavenger.
    Type: Grant
    Filed: October 4, 1985
    Date of Patent: April 21, 1987
    Assignee: Shell Oil Company
    Inventors: Stephen D. Matza, William E. Ellington, Henry C. Fleming, III
  • Controlling sulfide scavenger content of drilling fluid
    Patent number: RE33349
    Abstract: The concentration of unspent zinc-based hydrogen sulfide scavenger in an aqueous drilling fluid is controlled by selectively extracting the unspent scavenger in a solvent, such as glacial acetic acid, measuring the concentration of dissolved zinc, for example, with an X-ray fluorescence spectrograph, and utilizing the results of the measurements to proportion the extent of changes to be made in the concentration of the scavenger.
    Type: Grant
    Filed: February 19, 1988
    Date of Patent: September 25, 1990
    Assignee: Shell Oil Company
    Inventors: Stephen D. Matza, William E. Ellington, Henry C. Fleming, III