G - Physics – 01 – V
Patent
G - Physics
01
V
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G01V 1/40 (2006.01) G01V 1/52 (2006.01)
Patent
CA 1249050
ABSTRACT OF THE DISCLOSURE The acoustic measuring device to examine the permeability and the fracturing of rock in the formation penetrated by a bore- hole consists of a logging sonde, immersed into a borehole fluid (mud) and moveble along the borehole axis. The sonde contains a pulse-emitting transmitter and a receiver recording the resulting echo signals. In order to record the geophysically important echo waves undisturbed by secondary signals, the effective spacing between transmitter and receiver in the sonde is smaller than half a wave length in the mud of the emitted signal. It concerns a reflection configuration comprising, essentially, of axial oscillators, which have a broad frequency band, but work, preferentially, in the lower acoustic frequency range. The recording time of the recorded sonograms (micro- seismograms) measures up to about one second.
474823
Borden Ladner Gervais Llp
Husten Peter
LandOfFree
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