Battery conservation

Details Battery conservation Battery conservation

2003-10-03

2008-10-21

Edwards, Jr., Timothy (Department: 2612)

Communications: electrical

Wellbore telemetering or control

Pulse or digital signal transmission

C340S855500, C340S855700

Reexamination Certificate

active

07439875

ABSTRACT:
Methods and apparatus for conserving battery energy used in transmitting signals carrying data from a downhole location, using a transmission system where a predetermined set of data is to be transmitted once during a predetermined period. The method can comprise the steps of: transmitting at least one signal during said period to transmit the set of data; selecting the time of transmission of said at least one signal; and representing at least some of the data to be transmitted in terms of the time of transmission of said at least one signal.

REFERENCES:
patent: 3659085 (1972-04-01), Potter et al.
patent: 4293936 (1981-10-01), Cox et al.
patent: 4513403 (1985-04-01), Troy
patent: 5127404 (1992-07-01), Wyborny et al.
patent: 5148408 (1992-09-01), Matthews
patent: 5689248 (1997-11-01), Esfahani et al.
patent: 2 094 527 (1982-09-01), None
patent: 2 281 424 (1995-03-01), None
patent: WO 93/06578 (1993-04-01), None
International Search Report for International Application No. PCT/GB2003/004301 completed Jan. 26, 2004.
Standard Search Report for corresponding European Application completed Jul. 2, 2003.

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