Digital telemetering system for subsurface instrumentation

Details Digital telemetering system for subsurface instrumentation Digital telemetering system for subsurface instrumentation

1975-06-02

1976-11-16

Myracle, Jerry W.

Measuring and testing

Borehole or drilling

Downhole test

340 18P, E21B 4700

Patent

active

039916111

ABSTRACT:
An improved digital telemetering system for conveying information from a subsurface measuring device to a receiving station located at the other end of the cable used to lower and retrieve the measuring device is disclosed. The information being telemetered is converted into digital form within the subsurface measuring device and is communicated as digital numbers over the telemetry link for recording, display and interpretation at the receiving station. A single insulated wire within the hoist cable can convey all signals and the electrical power to the subsurface equipment. The outer sheath of the hoist cable provides the return circuit. A decoder circuit located within the surface equipment recovers the data and converts them to useful information. The system can be adapted to handle data from several sources simultaneously and can act as a communication link in both directions without the need for added conductors in the hoist cable.

REFERENCES:
patent: 3388375 (1968-06-01), Sloughter
patent: 3821696 (1974-06-01), Harrell et al.

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