Patents by Inventor Jay B. Shivers

Jay B. Shivers 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).

  • Multi zone isolation tool having fluid loss prevention capability and method for use of same
    Patent number: 6997263
    Abstract: A multi zone isolation tool (50) for use in a subterranean wellbore includes a first tubular and a second tubular disposed within the first tubular forming an annular flow path (110a, 110b) therebetween and a central flow path (70a, 80a, 80b) through the second tubular. An annular valving assembly (90, 80) is positioned in the annular flow path (110a, 110b) and a central valving assembly (148, 186) is positioned in the central flow path (70a, 80a, 80b). The central valving assembly (186) is operably coupled to the annular valving assembly (90) such that when the central valving assembly (148, 186) is in a closed position, a pressure variation in the central flow path (70a, 80a, 80b) will operate the annular valving assembly (90, 80) from a closed position to an open position.
    Type: Grant
    Filed: April 30, 2003
    Date of Patent: February 14, 2006
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Patrick F. Campbell, William David Henderson, Jay B. Shivers, Mark E. P. Dawson
  • Multi zone isolation tool having fluid loss prevention capability and method for use of same
    Publication number: 20040020652
    Abstract: A multi zone isolation tool (50) for use in a subterranean wellbore includes a first tubular and a second tubular disposed within the first tubular forming an annular flow path (110a, 110b) therebetween and a central flow path (70a, 80a, 80b) through the second tubular. An annular valving assembly (90, 80) is positioned in the annular flow path (110a, 110b) and a central valving assembly (148, 186) is positioned in the central flow path (70a, 80a, 80b). The central valving assembly (186) is operably coupled to the annular valving assembly (90) such that when the central valving assembly (148, 186) is in a closed position, a pressure variation in the central flow path (70a, 80a, 80b) will operate the annular valving assembly (90, 80) from a closed position to an open position.
    Type: Application
    Filed: April 30, 2003
    Publication date: February 5, 2004
    Inventors: Patrick F. Campbell, William David Henderson, Jay B. Shivers, Mark E.P. Dawson