Electricity: measuring and testing – Particle precession resonance – Using well logging device
Reexamination Certificate
2006-07-27
2010-12-28
Shrivastav, Brij B (Department: 2831)
Electricity: measuring and testing
Particle precession resonance
Using well logging device
C324S300000
Reexamination Certificate
active
07859260
ABSTRACT:
A nuclear magnetic resonance sensing apparatus and method for operating in an earth borehole comprises a source of switchable magnetic field to polarize nuclei in the region of interest, said source comprising a coil wound on a magnetic core having controllable residual magnetization. Maintaining the magnetization of the core during a polarization interval does not require steady current in the coil. Switching intensity and polarity of magnetization of the core causes precession of spin magnetic moments of the nuclei; the precession induces a signal indicative of nuclear magnetic resonance properties of earth formations.
REFERENCES:
patent: 2992389 (1961-07-01), Gondouin
patent: 3453530 (1969-07-01), Attali
patent: 3538429 (1970-11-01), Baker
patent: 3667035 (1972-05-01), Slichter
patent: 3731752 (1973-05-01), Schad
patent: 3965412 (1976-06-01), Yungul
patent: 4035718 (1977-07-01), Chandler
patent: 4205288 (1980-05-01), Lin et al.
patent: 4409846 (1983-10-01), Ueno
patent: 4465140 (1984-08-01), Hoehn, Jr.
patent: 4717878 (1988-01-01), Taicher et al.
patent: 4736634 (1988-04-01), Amata
patent: 5055787 (1991-10-01), Kleinberg et al.
patent: 5086554 (1992-02-01), Murata et al.
patent: 6002317 (1999-12-01), Pignataro
patent: 6133735 (2000-10-01), Hurlimann et al.
patent: 6166543 (2000-12-01), Sezginer et al.
patent: 6229422 (2001-05-01), Pignataro
patent: 6366086 (2002-04-01), Sen
patent: 6452388 (2002-09-01), Reiderman et al.
patent: 6559640 (2003-05-01), Taicher
patent: 6791331 (2004-09-01), Conti
patent: 7046009 (2006-05-01), Itskovich
patent: 7075298 (2006-07-01), Mityushin et al.
patent: 7423426 (2008-09-01), Reiderman
patent: 7463027 (2008-12-01), Prammer et al.
patent: 7663363 (2010-02-01), Reiderman
patent: 2003/0076107 (2003-04-01), Fanini et al.
patent: 2003/0129763 (2003-07-01), Chamberlain et al.
patent: 2004/0183538 (2004-09-01), Hanstein et al.
patent: 2005/0030021 (2005-02-01), Prammer et al.
patent: 2005/0189945 (2005-09-01), Reiderman
patent: 2006/0255799 (2006-11-01), Reiderman
patent: 2007/0222444 (2007-09-01), Reiderman
patent: 2009/0015254 (2009-01-01), Castillo et al.
patent: 2408584 (2005-06-01), None
Baker Hughes Incorporated
Mossman Kumar & Tyler PC
Shrivastav Brij B
LandOfFree
Nuclear magnetic resonance tool using switchable source of... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Nuclear magnetic resonance tool using switchable source of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nuclear magnetic resonance tool using switchable source of... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4175920