Borehole imaging apparatus

Details Borehole imaging apparatus Borehole imaging apparatus

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G01V 1/40 (2006.01) E21B 47/00 (2006.01) E21B 49/00 (2006.01) G01V 1/46 (2006.01) G01V 1/48 (2006.01) H03G 1/02 (2006.01) H03G 3/20 (2006.01) H04N 7/18 (2006.01)

Patent

CA 1301301

K 9168 A B S T R A C T BOREHOLE IMAGING APPARATUS A borehole imaging apparatus of the type having acoustic transducer means for transmitting and receiving acoustic energy signals through the fluid in a borehole comprises variable gain amplifier means controllable from the surface for continuing to increase the amount of gain applied to each said signal as a function of the propagation time of the acoustic energy through the borehole fluid, to reduce false signal effects such as initial ringdown, mud reflections, and time-dependent borehole fluid attenuation of said acoustic energy. T5/K9168

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