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Title: NMR logging apparatus

Patent ·
OSTI ID:1492041

Technologies including NMR logging apparatus and methods are disclosed. Example NMR logging apparatus may include surface instrumentation and one or more downhole probes configured to fit within an earth borehole. The surface instrumentation may comprise a power amplifier, which may be coupled to the downhole probes via one or more transmission lines, and a controller configured to cause the power amplifier to generate a NMR activating pulse or sequence of pulses. Impedance matching means may be configured to match an output impedance of the power amplifier through a transmission line to a load impedance of a downhole probe. Methods may include deploying the various elements of disclosed NMR logging apparatus and using the apparatus to perform NMR measurements.

Research Organization:
VISTA CLARA INC., Mukilteo, WA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
FG02-07ER84931
Assignee:
VISTA CLARA INC. (Mukilteo, WA)
Patent Number(s):
10,113,982
Application Number:
14/054,361
OSTI ID:
1492041
Resource Relation:
Patent File Date: 2013 Oct 15
Country of Publication:
United States
Language:
English

References (10)

Nuclear magnetic resonance sensing apparatus and techniques patent December 1987
Borehole measurement of NMR characteristics of earth formations patent October 1991
Intermediate potential generating circuit having output stabilizing circuit patent January 1998
NMR well logging apparatus and method patent January 2000
Eccentric NMR well logging apparatus and method patent February 2000
Nuclear magnetic resonance apparatus and method for geological applications patent June 2000
Apparatus and method for magnetic resonance logging patent April 2002
Nuclear magnetic resonance logging with azimuthal resolution patent April 2002
Systems and methods for deep-looking NMR logging patent December 2008
NMR logging apparatus patent May 2014