Downhole telemetry system using multiple uplink modes as...

Details Downhole telemetry system using multiple uplink modes as... Downhole telemetry system using multiple uplink modes as...

2006-11-07

2006-11-07

Hofsass, Jeffery (Department: 2612)

Communications: electrical

Wellbore telemetering or control

Using a specific transmission medium

C340S854100, C340S854200, C340S854400, C340S854500, C340S853100, C340S855500, C340S855600, C340S855700, C340S315000, C367S157000, C367S178000, C370S441000

Reexamination Certificate

active

07132958

ABSTRACT:
A method and a downhole telemetry system a downhole telemetry system using discrete multitone modulation for transmitting a data stream over a plurality of transmission modes is provided. The downhole telemetry system includes a downhole transmitter, a cable, and a surface receiver. The downhole transmitter is configured to transmit the data stream over the plurality of transmission modes. The surface receiver is coupled to the downhole transmitter via the cable and is configured to combine signals from each of the plurality of transmission modes to obtain the data stream transmitted by the downhole receiver. The method includes receiving a plurality of signals over the plurality of transmission modes from a downhole package, and may further include combining the plurality of signals to form at least one data stream.

REFERENCES:
patent: 3603923 (1971-09-01), Nelligan
patent: 4720996 (1988-01-01), Marsden et al.
patent: 5596604 (1997-01-01), Cioffi et al.
patent: 6469636 (2002-10-01), Baird et al.
patent: 6937159 (2005-08-01), Hill et al.
patent: 2003/0011489 (2003-01-01), Viswanathan

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