Patents by Inventor Kerby J. Dufrene

Kerby J. Dufrene 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).

  • Joining tubular members
    Patent number: 7866708
    Abstract: An apparatus includes a connector to connect a first tubing section and a second tubing section together. The connector that includes a body that includes a first opening to receive the first tubing section, a second opening to receive the second tubing section, and a passageway. The apparatus includes a member that is adapted to be moved from a retracted position to an extended position to form a sealed connection between a tubular member that is connected to the first tubing section and the passageway.
    Type: Grant
    Filed: March 9, 2004
    Date of Patent: January 11, 2011
    Assignee: Schlumberger Technology Corporation
    Inventors: Craig D. Johnson, Matthew R. Hackworth, Michael D. Langlais, David Wei Wang, Laurent Alteirac, Stephane J. Virally, Jason Bigelow, Kerby J. Dufrene, Bruno Khan, Martin Prado, Ashish Sharma
  • Joining tubular members
    Patent number: 7493959
    Abstract: An apparatus includes a connector to connect a first tubing section and a second tubing section together. The connector that includes a body that includes a first opening to receive the first tubing section, a second opening to receive the second tubing section, and a passageway. The apparatus includes a member that is adapted to be moved from a retracted position to an extended position to form a sealed connection between a tubular member that is connected to the first tubing section and the passageway.
    Type: Grant
    Filed: July 31, 2006
    Date of Patent: February 24, 2009
    Assignee: Schlumberger Technology Corporation
    Inventors: Craig D. Johnson, Matthew R. Hackworth, Michael D. Langlais, David W. Wang, Laurent Alteirac, Stephane J. Virally, Jason Bigelow, Kerby J. Dufrene, Bruno Khan, Martin Prado, Ashish Sharma
  • Apparatus and method for zonal isolation
    Patent number: 6494256
    Abstract: A method and apparatus for isolating a completing and isolating a zone within a subterranean wellbore is disclosed. One embodiment of the present invention is a zonal isolation assembly for completing a first zone in a subterranean wellbore. The zonal isolation assembly comprises an inner housing and a sliding sleeve capable of moving between an open and closed position is disposed within the inner housing. A passageway provides fluid communication between the inside and outside of the inner housing and an isolation tubing element is at least partially disposed within the inner housing and capable of moving between an upper position and a lower position. When the sliding sleeve is in its closed position and the isolation tubing element is in its lower position, fluid communication from the first zone through the isolation assembly is restricted.
    Type: Grant
    Filed: August 3, 2001
    Date of Patent: December 17, 2002
    Assignee: Schlumberger Technology Corporation
    Inventors: Timothy T. Achee, Jr., Joseph E. Hayes, James Wenner, Kerby J. Dufrene