Method and apparatus for NMR sensor with loop-gap resonator

Electricity: measuring and testing – Particle precession resonance – Using well logging device

Reexamination Certificate

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Reexamination Certificate

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06984980

ABSTRACT:
A loop-gap resonator for providing an excitation pulse in a down hole nuclear magnetic resonating (NMR) tool for determining a parameter of interest in a formation adjacent a borehole. The loop-gap resonator is constructed having one or more capacitive gaps formed in a nonmagnetic conductive loop. The loop-gap resonator may be deployed down a bore in a measurement while drilling (MWD) configuration or in a wire line configuration. The MWD configuration may utilize a non-rotating sleeve rotationally associated with the drill string.

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