NMR logging apparatus

Walsh, David O.; Turner, Peter

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Title: NMR logging apparatus

Abstract

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.

Inventors:: Walsh, David O.; Turner, Peter

Issue Date:: 2018-10-30

Research Org.:: VISTA CLARA INC., Mukilteo, WA (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1492041

Patent Number(s):: 10113982

Application Number:: 14/054,361

Assignee:: VISTA CLARA INC. (Mukilteo, WA)

Patent Classifications (CPCs):: G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES

G - PHYSICS G01 - MEASURING G01R - MEASURING ELECTRIC VARIABLES

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G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
G01N24/08 - by using nuclear magnetic resonance
G01N24/081 - {Making measurements of geologic samples, e.g. measurements of moisture, pH, porosity, permeability, tortuosity or viscosity}

G - PHYSICS G01 - MEASURING G01R - MEASURING ELECTRIC VARIABLES
G01R33/341 - comprising surface coils
G01R33/3628 - {Tuning/matching of the transmit/receive coil}
G01R33/3808 - {Magnet assemblies for single-sided MR wherein the magnet assembly is located on one side of a subject only

G - PHYSICS G01 - MEASURING G01V - GEOPHYSICS
G01V3/32 - operating with electron or nuclear magnetic resonance

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DOE Contract Number:: FG02-07ER84931

Resource Type:: Patent

Resource Relation:: Patent File Date: 2013 Oct 15

Country of Publication:: United States

Language:: English

Subject:: 47 OTHER INSTRUMENTATION

Citation Formats


                    Walsh, David O., and Turner, Peter. NMR logging apparatus.  United States: N. p., 2018. 
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                    Walsh, David O., & Turner, Peter. NMR logging apparatus.  United States.

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                    Walsh, David O., and Turner, Peter. Tue .  
        "NMR logging apparatus".  United States.  https://www.osti.gov/servlets/purl/1492041.

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@article{osti_1492041,

  title        = {NMR logging apparatus},

  author       = {Walsh, David O. and Turner, Peter},

  abstractNote = {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.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2018},

  month        = {10}

}

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Works referenced in this record:

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patent, December 2008

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