Apparatus and method for obtaining a nuclear magnetic resonance measurement while drilling
作者： Bruno Luong , Steven F. Crary , Martin E. Poitzsch , Krishnamurthy Ganesan , Ralf Heidler
DOI:
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摘要: The present invention is directed to a nuclear magnetic resonance logging-while-drilling tool. tool comprises drill bit, string, plurality of RF antennas, and at least one gradient coil. further magnets that are polarized in direction parallel the longitudinal axis but opposite each other. configuration antennas provides for two NMR regions investigation.
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