Electricity: measuring and testing – Particle precession resonance – Using well logging device
Reexamination Certificate
2007-06-01
2010-02-16
Shrivastav, Brij B. (Department: 2831)
Electricity: measuring and testing
Particle precession resonance
Using well logging device
C324S306000, C324S314000
Reexamination Certificate
active
07663363
ABSTRACT:
A method for measuring nuclear magnetic properties (NMR) properties of a formation, the method including applying a magnetic field to nuclei of the formation during a polarizing interval, the magnetic field having a polarizing intensity; changing the magnetic field to a measurement intensity, the measurement intensity applied to the nuclei of the formation during a measurement interval; applying to the formation at least one radio frequency (RF) pulse train during the measurement interval; and measuring an NMR signal from the formation.
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U.S. Appl. No. 11/743,863. “Selective Excitation in Earth's Magnetic Field Nuclear Magnetic Resonance Well Logging Tool”. Filed May 3, 2007. 33 pages.
International Search Report for International Application No. PCT/US2008/065265. Mailed Aug. 12, 2008.
Written Opinion of the International Searching Authority for International Application No. PCT/US2008/065265. Mailed Aug. 12, 2008.
Baker Hughes Incorporated
Cantor & Colburn LLP
Fetzner Tiffany A
Shrivastav Brij B.
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