Communications: electrical – Selective – Having electron beam device
Patent
1974-07-17
1976-09-07
Birmiel, Howard A.
Communications: electrical
Selective
Having electron beam device
340 155TN, 340 18R, 346 33WL, 346110R, G01V 134, G01V 140
Patent
active
039797147
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 two-receiver, variable-density recording. A .DELTA.T unit computes the interval traveltime of the acoustic pulses between the two receivers as represented by the two variable-density recordings. A plotter produces a continuous curve of this interval traveltime in correlation with the depth of the receivers in the borehole.
REFERENCES:
patent: 3374851 (1968-03-01), Brokaw
patent: 3402388 (1968-09-01), Tucker
patent: 3803588 (1974-04-01), Le Schack
Birmiel Howard A.
Hager Jr. George W.
Huggett C. A.
Mobil Oil Corporation
LandOfFree
Two-receiver, variable-density logging system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Two-receiver, variable-density logging system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Two-receiver, variable-density logging system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2175623