Process and device for transmitting information over a distance

Details Process and device for transmitting information over a distance Process and device for transmitting information over a distance

1981-07-06

1987-02-03

Tarcza, Thomas H.

Communications, electrical: acoustic wave systems and devices

Wellbore telemetering

Through well fluids

367 83, G01V 140

Patent

active

046412891

ABSTRACT:
A downhole telemetry system for transmitting signals from a subterranean region in a well to the surface of the earth while drilling employs changes in the mud pressure encoded in digital form. The changes in mud pressure are accomplished by two balanced valves, one of which increases pressure by control of flow within the drill string, the other of which controls flow from the drill string to the annular between the drill string and the well.

REFERENCES:
patent: 2759143 (1956-08-01), Arps
patent: 3958217 (1976-05-01), Spinnler
patent: 3983948 (1976-10-01), Jeter
patent: 4027282 (1977-05-01), Jeter
patent: 4078620 (1978-03-01), Westlake et al.
patent: 4351037 (1982-09-01), Scherbatskoy
Patton et al., "Development and Successful Testing of a Continuous-Wave, Logging-While-Drilling Telemetry System", Journal of Petroleum Technology, Oct. 1977, pp. 1215-1221.

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