Patents by Inventor Andrew John Duguid

Andrew John Duguid 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).

  • Annular region evaluation in sequestration wells
    Patent number: 7921714
    Abstract: Methods and related systems are described for making measurements at multiple locations in an annular region of a cased sequestration well. A first tool module is positionable within the well and adapted to directly or indirectly measure changing pressure at a first location in the annular region of the well. A pressure change is induced at the first location in the annular region. A second tool module is positionable within the well and adapted to directly or indirectly measure changing pressure at a second location in the annular region. The measured pressure changes at the second location are in response to the induced pressure change at the first location.
    Type: Grant
    Filed: May 2, 2008
    Date of Patent: April 12, 2011
    Assignee: Schlumberger Technology Corporation
    Inventors: Andrew John Duguid, Edward C. Boratko, Ahmad Latifzai
  • ANNULAR REGION EVALUATION IN SEQUESTRATION WELLS
    Publication number: 20090272530
    Abstract: Methods and related systems are described for making measurements at multiple locations in an annular region of a cased sequestration well. A first tool module is positionable within the well and adapted to directly or indirectly measure changing pressure at a first location in the annular region of the well. A pressure change is induced at the first location in the annular region. A second tool module is positionable within the well and adapted to directly or indirectly measure changing pressure at a second location in the annular region. The measured pressure changes at the second location are in response to the induced pressure change at the first location.
    Type: Application
    Filed: May 2, 2008
    Publication date: November 5, 2009
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Andrew John Duguid, Edward C. Boratko, Ahmad Latifzai