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Patent
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G01V 3/18 (2006.01) E21B 23/02 (2006.01) E21B 47/16 (2006.01)
Patent
CA 1106958
WELLBORE INSTRUMENT HANGER ABSTRACT OF THE DISCLOSURE A sub for use in an acoustic telemetry system provides a sound path of low impedance to facilitate the transmission of acoustic signals through a string of pipe positioned in a wellbore. The sub section of pipe includes a tubular receiving member positioned in the bore of a pipe section and spaced from the interior walls thereof. Ports and flow channels are also provided to permit the passage of well fluids through the pipe section when an acoustic instrument is positioned in the tubular receiving member. A lateral shoulder is formed in the interior wall of the receiving member and is arranged to matingly receive a flat portion on the instrument. The abutment of the flat portion of the instrument and the shoulder provides a positive sound path for transmission of longitudinal sound waves from the instrument to the receiver member. The receiver member in turn is connected to the pipe section by longitudinal portions essentially concentric with the axis of the pipe section so as to provide a direct low impedance sound path for the efficient direct transmission of longitudinal sound waves.
306635
Chaney Preston E.
Sharp H. Eugene
Gowling Lafleur Henderson Llp
Sperry-Sun Inc.
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