G - Physics – 01 – V
Patent
G - Physics
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V
358/4
G01V 5/10 (2006.01)
Patent
CA 1175159
PULSED NEUTRON WELL LOGGING SYSTEM AND METHOD (D#77,019-F) ABSTRACT A well logging system and method involves the use of a well logging tool in a borehole traversing an earth formation which includes a pulsed neutron generator perio- dically bombarding the earth formation with neutrons. A scintillation-type detector detects gamma radiation from the earth formation and provides electrical data pulses corres- ponding in pulse height and frequency to the detected gamma radiation. Another circuit provides synchronization/ stabilization pulses which are time related to the neutron bombardments of the formation. A cable conducts the data pulses and the synchronization/stabilization pulses uphole to surface electronics. A receiver with surface electronics processes the pulses and provides them to a gate circuit which passes or blocks the data pulses and the synchroni- zation/stabilization pulses in accordance with a gate signal. The passed pulses are provided to a pulse height analyzer. The synchronization/stabilization pulses are also provided by the receiver to a gate signal network which provides the gate signal in accordance with the synchroni- zation/stabilization pulses. I
405127
Smart & Biggar
Texaco Development Corporation
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