Patents by Inventor Roger A. Dworak

Roger A. Dworak 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).

  • Apparatus and method for computing a distribution of spin-spin relaxation times
    Patent number: 6184681
    Abstract: The present invention is directed to a method for computing a distribution of spin—spin relaxation times. The spin-echo amplitudes are obtained by hardware integration of the receiver voltages over a time window. A linear operator is utilized to map a relaxation-time distribution to spin-echoes, produce a singular value decomposition (SVD) of the linear operator, determine vectors of the SVD, and compress the spin-echo data using the vectors. To eliminate a telemetry bottleneck, the T2 spectrum is computed downhole and transmitted to the surface.
    Type: Grant
    Filed: November 5, 1998
    Date of Patent: February 6, 2001
    Assignee: Schlumberger Technology Corporation
    Inventors: Ralf Heidler, Roger A. Dworak, Bruno Luong, Martin E. Poitzsch