Detector pulse forming system for nuclear well logging tools

Details Detector pulse forming system for nuclear well logging tools Detector pulse forming system for nuclear well logging tools

1982-12-09

1985-09-24

Smith, Alfred E.

Radiant energy

Geological testing or irradiation

Well testing apparatus and methods

2502521, G01V 504, G01D 1800

Patent

active

045434786

ABSTRACT:
For use in a nuclear well logging tool, detector pulse simulator circuits in the preferred and illustrated embodiments are set forth. The simulator circuit is adapted to be placed in a sonde for connection with a well logging tool to provide simulated detector pulses. It is selectively switched on to the output a calibrated pulse sequence function through a number of different levels. It incorporates a circuit means forming pulses limited in amplitude by an envelope yielding pulses of differing amplitude in progression. The circuit is stepped repetitively through its range of operation, for example, from a minimum voltage peak to some specified maximum and then recycles.

REFERENCES:
patent: 3264475 (1966-08-01), Reed et al.
patent: 3312908 (1967-04-01), Porges et al.
patent: 3970928 (1976-07-01), Kachel
patent: 4031367 (1977-06-01), Murphy

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