Method and apparatus of measuring ultrasonic time travel informa

Details Method and apparatus of measuring ultrasonic time travel informa Method and apparatus of measuring ultrasonic time travel informa

1988-12-29

1990-05-29

Lobo, Ian J.

Communications, electrical: acoustic wave systems and devices

Seismic prospecting

Well logging

G01V 140

Patent

active

049301098

ABSTRACT:
A method for measuring time of travel information of an acoustic return obtained from borehole logging operations avoids the phenomena of cycle skipping. The time of travel is determined from a threshold travel time and a digitization travel time. The threshold travel time is measured from the generated acoustic waveform to the detected threshold level of the acoustic return. The digitization travel time is measured from the threshold travel time to the time of the peak amplitude of the acoustic return.

REFERENCES:
patent: 3978939 (1976-09-01), Trouiller
patent: 4040001 (1977-08-01), Vivet et al.
patent: 4042907 (1977-08-01), Trouiller et al.
patent: 4172250 (1979-10-01), Guignard
patent: 4346460 (1982-08-01), Schuster
patent: 4777629 (1988-10-01), Morris et al.

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