Communications – electrical: acoustic wave systems and devices – Wellbore telemetering – Through drill string or casing
Patent
1994-09-09
1995-12-19
Eldred, J. Woodrow
Communications, electrical: acoustic wave systems and devices
Wellbore telemetering
Through drill string or casing
175 40, 16625001, H04H 900
Patent
active
054775051
ABSTRACT:
A system for transmitting signals along a downhole string including a plurality of serially connected tubular pipes such as drill or production pipes, a transmitter for transmitting a signal along the string and a receiver for receiving the signal placed along the string at a location spaced from said transmitting means, wherein the pipes between the transmitter and the receiver are ordered according to length of tube to minimize loss of signal from said transmitter to said receiver.
REFERENCES:
patent: 5128901 (1992-07-01), Drumheller
patent: 5303203 (1994-04-01), Kingman
patent: 5377161 (1994-12-01), Meehan
Drumheller, D. S., "Acoustical Properties of Drill String," J. Acoust. Soc. AM, vol. 85, (3) pp. 1048-1064, (1989).
Drumheller, D. S., "Attenuation of Sound Waves In Drill Strings," J. Acoust. Soc. Am, vol. 94, (4), pp. 2387-2396, (1993).
Eldred J. Woodrow
Libman George H.
Sandia Corporation
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