Telemetry driving circuit

Details Telemetry driving circuit Telemetry driving circuit

1983-08-16

1986-04-15

Jordan, Charles T.

Communications: electrical

Wellbore telemetering or control

Pulse or digital signal transmission

166 651, G01V 100, E21B 2902

Patent

active

045830932

ABSTRACT:
For use with a down hole logging system equipped with a logging cable having two wires therein, the preferred and illustrated embodiment sets forth a system which conducts electrical power and telemetry signals along a two wire logging cable. AC power is generated at the surface for transmission to a power consuming load in the sonde. This AC supply has a specified frequency, there also being data gathering equipment in the sonde which forms an AC telemetry signal transmitted up the two wire logging cable. This disclosure is directed to an improvement in the telemetry drive circuitry which maintains the isolation between power flow and signal flow. The circuitry incorporates FET output transistors, transformer coupled, to provide the necessary output signal and isolation.

REFERENCES:
patent: 3952282 (1976-04-01), Zemanek, Jr.
patent: 4293934 (1981-10-01), Herolz et al.

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