Communications: electrical – Selective – Having electron beam device
Patent
1974-07-17
1976-04-20
Wilbur, Maynard R.
Communications: electrical
Selective
Having electron beam device
181102, 340 155DS, 340 155BH, 346 33WL, 346110R, G01V 140
Patent
active
039522822
ABSTRACT:
An acoustic velocity logging tool employs a transmitter and a pair of receivers. Acoustic pulses from the transmitter pass through the formation surrounding the borehole to the receivers. The received signals, along with control signals, are transferred to an uphole recording system. A record unit operates to apply these receiver and control signals to a magnetic tape recorder. A playback unit transfers the recorded receiver signals to the intensity modulation input of a cathode-ray oscilloscope and, in response to the recorded control signals, applies a trigger pulse to the sweep input of the cathode-ray oscilloscope, successive sweeps of the cathode-ray oscilloscope being intensity modulated alternately by the recorded receiver signals of the pair of receivers. A film recorder makes a continuous film recording of the receiver signals as they appear as variable-density traces on the face of the cathode-ray oscilloscope to provide a continuous two-receiver, variable-density recording.
REFERENCES:
patent: 3025123 (1962-03-01), Klein, Jr.
patent: 3149304 (1964-09-01), Summers
patent: 3270316 (1966-08-01), Walker, Jr. et al.
patent: 3374851 (1968-03-01), Brokaw
patent: 3402388 (1968-09-01), Tucker
Birmiel H. A.
Hager Jr. George W.
Huggett C. A.
Mobil Oil Corporation
Wilbur Maynard R.
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