Patents by Inventor Jon J. Schroer

Jon J. Schroer 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).

  • Analysis of downhole OBM-contaminated formation fluid
    Patent number: 6274865
    Abstract: A method and apparatus is provided for determining OBM filtrate fraction in a downhole fluid sample. One embodiment of the method is used when there is significant difference between the coloration of formation fluid and the coloration of OBM filtrate. Another is used when there is little or no difference between the coloration of formation fluid and the coloration of OBM filtrate. Another determines GOR of formation fluid corrected for OBM filtrate contamination. Another determines OD of formation fluid corrected for OBM filtrate contamination. Another determines conditions that would render optical density measurements invalid and sample capture premature. Another predicts the reduction of filtrate fraction for a specific extended pumping time. Another initiates sample capture when computed contamination fraction exhibits stable asymptotic convergence.
    Type: Grant
    Filed: February 23, 1999
    Date of Patent: August 14, 2001
    Assignee: Schlumberger Technology Corporation
    Inventors: Jon J. Schroer, Oliver C. Mullins