Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Well logging
Patent
1988-11-21
1992-04-14
Moskowitz, Nelson
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Well logging
367158, 367912, 181106, G01V 140, G01V 128
Patent
active
051053900
ABSTRACT:
A sonde is secured to the end of an electrical cable and is inserted is a bore hole by means of the electrical cable. The sonde has a transmitter and receiver. The other end of the cable is secured to apparatus on the surface, and the apparatus includes means for forming a signal transmitting it through the cable to the transmitter, the transmitter emitting the signal from the sonde, that signal bouncing off of the wall of the bore hole and then back to the receiver. The signal is then sent from the receiver through the cable to the apparatus on the ground. That apparatus also has means for recording the results of the signals so formed and mainpulated. The transmitter and the receiver in the sonde are placed together, not more than one half of the wave length of the signal, and to a spacing as small as zero, with transmitter and receiver effectively in one location.
REFERENCES:
patent: 2616223 (1952-11-01), Lanher
patent: 2849075 (1958-08-01), Goolbey
patent: 2868311 (1959-01-01), Tullos
patent: 2894597 (1959-07-01), Kean et al.
patent: 3697937 (1972-10-01), Ingrau
patent: 4131875 (1978-12-01), Ingrau
patent: 4419748 (1983-12-01), Siegfried
patent: 4715019 (1987-12-01), Medlin et al.
Huang et al., "The Correlation of Tube Wave, Events With Open Fractures in Fluid Filled Boreboles", Current Research, Part A, Geological Survey of Canada, paper 81-1A, pp. 361-376, 1981.
Gallagher Paul H.
Moskowitz Nelson
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