Patents Represented by Attorney, Agent or Law Firm John J. Pyberg
  • Apparatus and method for obtaining a nuclear magnetic resonance measurement while drilling
    Patent number: 6246236
    Abstract: The present invention is directed to a nuclear magnetic resonance logging-while-drilling tool. The tool comprises a drill bit, drill string, a plurality of RF antennas, and at least one gradient coil. The tool further comprises a plurality of magnets that are polarized in a direction parallel to the longitudinal axis of the tool but opposite to each other. The configuration of magnets and antennas provides for at least two NMR regions of investigation.
    Type: Grant
    Filed: November 5, 1998
    Date of Patent: June 12, 2001
    Assignee: Schlumberger Technology Corporation
    Inventors: Martin E. Poitzsch, Steven F. Crary, Krishnamurthy Ganesan, Ralf Heidler, Bruno Luong, Peter Speier