Radiant energy – Geological testing or irradiation – Well testing apparatus and methods
Patent
1977-09-09
1979-07-24
Willis, Davis L.
Radiant energy
Geological testing or irradiation
Well testing apparatus and methods
250263, G01V 500
Patent
active
041624009
ABSTRACT:
A well logging system provides at least one output corresponding to a condition sensed in a borehole traversing an earth formation. The well logging system includes a logging instrument which includes a sensor sensing the condition and providing electrical pulses corresponding in number and peak amplitude to the sensed condition. A converting circuit connected to the sensors converts each electrical pulse into a light pulse whose intensity corresponds to the peak amplitude. A well logging cable connected to the logging instrument includes a light conductor. The logging instrument further includes a circuit for applying the light pulses to one end of the light conductor. Surface apparatus includes a converter connected to the other end of the light conductor for converting each light pulse into a corresponding electrical pulse having a peak amplitude representative of the intensity of the light pulse. Circuitry connected to the electrical converter processes the electrical pulses provided by the light to electrical converter to provide the output corresponding to the sensed condition.
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patent: 2931905 (1960-04-01), Caha et al.
patent: 3413466 (1968-11-01), Allen, Jr.
patent: 3668396 (1972-06-01), Asars et al.
patent: 4047045 (1977-09-01), Paxton, Jr. et al.
patent: 4056719 (1977-11-01), Waaben
Gillespie Ronald G.
Ries Carl G.
Texaco Inc.
Whaley Thomas H.
Willis Davis L.
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