Electricity: measuring and testing – Particle precession resonance – Using well logging device
Reexamination Certificate
2007-05-23
2008-03-04
Shrivastav, Brij (Department: 2859)
Electricity: measuring and testing
Particle precession resonance
Using well logging device
C324S300000
Reexamination Certificate
active
07339374
ABSTRACT:
NMR spin echo signals are corrected for axial motion of the borehole logging tool. The correction is applied to an averaged echo train using an average velocity determined from surface measurements over the duration of averaging of the echo trains. An additional correction may be applied to correct for excess polarization or incomplete polarization of nuclear spins due to an insufficient wait time between pulse sequences. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.
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Baker Hughes Incorporated
Madan Mossman & Sriram P.C.
Shrivastav Brij
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