Acoustic velocity logging system

Details Acoustic velocity logging system Acoustic velocity logging system

1974-07-17

1976-06-29

Wilbur, Maynard R.

Communications: electrical

Selective

Having electron beam device

340 155BH, 346 33WL, 346 33MC, 340 18R, G01V 140

Patent

active

039672352

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. 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.

REFERENCES:
patent: 2756404 (1956-07-01), Anderson et al.
patent: 2839615 (1958-06-01), Sarratt
patent: 2946393 (1960-07-01), Hawkins
patent: 3207256 (1965-09-01), Blizard
patent: 3281773 (1966-10-01), Newman
patent: 3299400 (1967-01-01), Trowbridge et al.
patent: 3503037 (1970-03-01), Smith, Jr.
patent: 3781783 (1973-12-01), Tucker

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