Acoustic well logging system having multiplexed filter digitizin

Details Acoustic well logging system having multiplexed filter digitizin Acoustic well logging system having multiplexed filter digitizin

1986-12-12

1989-01-10

Tarcza, Thomas H.

Communications: electrical

Wellbore telemetering or control

Pulse or digital signal transmission

367 45, 367 81, G01V 140

Patent

active

047976683

ABSTRACT:
In an acoustic well logging system having an acoustic transmitter in a sonde and spaced acoustic receivers, an acoustic transmitter control circuit enabling transmission of high frequency pulses, acoustic receivers therefor, received signal frequency filter selector means and a digital signal processing system assist in data processing. The received signal is passed through high and low frequency filters, the filters being selectively switched, the signals are converted to digital form and then available for further processing.

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patent: 3701091 (1972-10-01), Lenihen
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patent: 4672588 (1987-06-01), Willen
patent: 4701892 (1987-10-01), Anderson
SPE 7446, "Formation Compressional & Shear Interval Transit Time Logging by Means of Long Spacing & Digital Techniques," Aron et al., 10/78.

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