Communications – electrical: acoustic wave systems and devices – Wellbore telemetering – Through well fluids
Patent
1982-08-04
1985-04-23
Moskowitz, Nelson
Communications, electrical: acoustic wave systems and devices
Wellbore telemetering
Through well fluids
33307, 181103, 181107, G01V 140, H04J 700, G11B 509
Patent
active
045134030
ABSTRACT:
A method and apparatus for encoding and synchronizing and sequencing pulse encoded data in a pulse telemetry system. The time intervals between successive pulses in a pulse train are representative of the magnitude of the data parameters. Redundant pulses are included in the pulse trains at predetermined time locations with respect to the pulses so as to enhance the ability to recognize or distinguish data pulses over noise signals. Synchronization pulses are employed to enable identification of the particular data parameters even though one or more of the data pulses is obscured by noise. The sequence of the production of the pulse code signals is continuously monitored to enable the telemetering system to be activated promptly after a shutdown at the place in the train of data where it would be if the shutdown had not occurred.
REFERENCES:
patent: Re27810 (1973-11-01), Buehrle
patent: 2759143 (1956-02-01), Arps
patent: 3863203 (1975-01-01), Patton et al.
patent: 3908453 (1975-09-01), Jeter
patent: 4001775 (1977-08-01), Sextan
patent: 4027282 (1977-05-01), Jeter
patent: 4131761 (1978-12-01), Guisto
patent: 4215425 (1980-07-01), Waggener et al.
patent: 4351037 (1982-09-01), Schenbotskoy
patent: 4357634 (1982-11-01), Chung
patent: 4386422 (1983-05-01), Mumby et al.
patent: 4390975 (1983-07-01), Shawhan
Bell, "Pulse Time Modulation", 12/44, pp. 21-24, Radio.
McDonald et al., "Borehole Telemetry . . . Measurements", 9/15/75, pp. 111-118, Oil & Gas Journal.
Fogarty, "Digital Communication Systems", 7/23/71, pp. 409-411, vol. M Summer Conference.
Exploration Logging, Inc.
Moskowitz Nelson
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