Patents by Inventor Randall D. Stilley

Randall D. Stilley 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 displacing liquids through pipes
    Patent number: 5483986
    Abstract: Improved methods of displacing a first liquid through a pipe with a second liquid while preventing the first and second liquids from mixing are provided. In accordance with the methods, a plug is formed in-situ in the pipe between the first and second liquids by injecting a self-thickening liquid therein and permitting the liquid to thicken. The formed plug and the first liquid are then displaced through the pipe with the second liquid. The methods are particularly suitable for carrying out subterranean well bore cementing operations wherein cement slurries are displaced through pipes disposed in well bores.
    Type: Grant
    Filed: June 9, 1994
    Date of Patent: January 16, 1996
    Assignee: Halliburton Company
    Inventors: David D. Onan, Vincent J. Bila, James L. Haney, Gary E. Folmnsbee, Ronney R. Koch, Randall D. Stilley, Larry T. Watters
  • Methods of displacing liquids through pipes
    Patent number: 5346011
    Abstract: Improved methods of displacing a first liquid through a pipe with a second liquid while preventing the first and second liquids from mixing are provided. In accordance with the methods, a plug is formed in-situ in the pipe between the first and second liquids by injecting a self-thickening liquid therein and permitting the liquid to thicken. The formed plug and the first liquid are then displaced through the pipe with the second liquid. The methods are particularly suitable for carrying out subterranean well bore cementing operations wherein cement slurries are displaced through pipes disposed in well bores.
    Type: Grant
    Filed: April 1, 1993
    Date of Patent: September 13, 1994
    Assignee: Halliburton Company
    Inventors: David D. Onan, Vincent J. Bila, James L. Haney, Gary E. Folmnsbee, Ronney R. Koch, Randall D. Stilley, Larry T. Watters