Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Well logging
Reexamination Certificate
2006-06-13
2006-06-13
Lobo, Ian J. (Department: 3662)
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Well logging
C367S081000, C367S083000
Reexamination Certificate
active
07061830
ABSTRACT:
A communication device is located within a well and includes a transducer that converts a first electrical signal into a first acoustic signal for transmission through the well and that converts second acoustic signal received from the well to a second electrical signal. The transducer is at least partially coated with an anechoic material in order to reduce the effects of acoustic signal impairments, such as echoes, flow and machine noise, and reverberations. The anechoic material has a thickness that is a fraction of a wavelength of the acoustic signals.
REFERENCES:
patent: 4860851 (1989-08-01), Krevor et al.
patent: 4883143 (1989-11-01), Lagier
patent: 5485053 (1996-01-01), Baz
patent: 6176312 (2001-01-01), Tubel et al.
patent: WO 91/03808 (1991-03-01), None
patent: WO 91/03808 (1991-03-01), None
The American Heritage Dictionary of the English Language, 2000, Fourth Edition.
WordNet 1.6, 1997 Princeton University.
Mallison Edgar R.
Stratton Thomas G.
Honeywell International , Inc.
Lobo Ian J.
Schiff & Hardin LLP
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