Patents by Inventor James E. Pabst

James E. Pabst 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).

  • Zonal isolation tool with same trip pressure test
    Patent number: 6575243
    Abstract: Apparatus and methods for gravel packing, isolating and testing a sand screen completion of a wellbore in a single trip are disclosed. One method comprises inserting into the wellbore a sand screen assembly, an isolation pipe, and a test assembly on a workstring. A gravel pack operation is performed, and the isolation pipe is shifted to a position in sealing contact with the sand screen assembly, thereby isolating the sand screen assembly. The test assembly is then shifted to a configuration that provides hydraulic communication between the interior of the isolation pipe and the workstring-wellbore annulus above the test assembly. Imposing pressure on the workstring-wellbore annulus then hydraulically tests the integrity of the seal between the isolation pipe and the sand screen assembly.
    Type: Grant
    Filed: April 16, 2001
    Date of Patent: June 10, 2003
    Assignee: Schlumberger Technology Corporation
    Inventor: James E. Pabst
  • Zonal isolation tool with same trip pressure test
    Publication number: 20020148607
    Abstract: Apparatus and methods for gravel packing, isolating and testing a sand screen completion of a wellbore in a single trip are disclosed. One method comprises inserting into the wellbore a sand screen assembly, an isolation pipe, and a test assembly on a workstring. A gravel pack operation is performed, and the isolation pipe is shifted to a position in sealing contact with the sand screen assembly, thereby isolating the sand screen assembly. The test assembly is then shifted to a configuration that provides hydraulic communication between the interior of the isolation pipe and the workstring-wellbore annulus above the test assembly. Imposing pressure on the workstring-wellbore annulus then hydraulically tests the integrity of the seal between the isolation pipe and the sand screen assembly.
    Type: Application
    Filed: April 16, 2001
    Publication date: October 17, 2002
    Inventor: James E. Pabst