Electricity: measuring and testing – Particle precession resonance – Using well logging device
Reexamination Certificate
2007-02-20
2007-02-20
Gutierrez, Diego (Department: 2859)
Electricity: measuring and testing
Particle precession resonance
Using well logging device
Reexamination Certificate
active
10839478
ABSTRACT:
NMR spin echo signals, acquired on a MWD logging tool, are susceptible to errors magnetic flux density has a gradient and the magnet on the logging tool is moving relative to the earth. The errors can be corrected by having the excitation pulse cover a smaller or a larger volume than the refocusing pulses. Correction may also be made by selective saturation, or by echo averaging.
REFERENCES:
patent: 2346216 (1944-04-01), Fraser
patent: 5023551 (1991-06-01), Kleinberg et al.
patent: 5185574 (1993-02-01), Ehman et al.
patent: 5389877 (1995-02-01), Sezginer et al.
patent: 5705927 (1998-01-01), Sezginer et al.
patent: 6032101 (2000-02-01), Freedman et al.
patent: 6049205 (2000-04-01), Taicher et al.
patent: 6051973 (2000-04-01), Prammer
patent: 6163153 (2000-12-01), Reiderman et al.
patent: 6268726 (2001-07-01), Prammer et al.
patent: 6297632 (2001-10-01), Speier
patent: 6344744 (2002-02-01), Taicher et al.
patent: 6452389 (2002-09-01), Edwards
patent: 6459263 (2002-10-01), Hawkes et al.
patent: 6466013 (2002-10-01), Hawkes et al.
patent: 6518755 (2003-02-01), Edwards
patent: 6566874 (2003-05-01), Speier et al.
patent: 6600316 (2003-07-01), Chen et al.
patent: 6686737 (2004-02-01), Kruspe et al.
patent: 6690167 (2004-02-01), Reiderman et al.
patent: 2004/0008027 (2004-01-01), Prammer
patent: WO01/59484 (2001-08-01), None
Blanz Martin
Fechete Radu
Kruspe Thomas
Rottengatter Peter
Thern Holger
Baker Hughes Incorporated
Gutierrez Diego
Madan Mossman & Sriram P.C.
Vargas Dixomara
LandOfFree
Reduction of motion artifacts in NMR does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Reduction of motion artifacts in NMR, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reduction of motion artifacts in NMR will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3835659