High data rate wireline telemetry system

Details High data rate wireline telemetry system High data rate wireline telemetry system

1993-06-25

1995-02-07

Eldred, J. Woodrow

Communications: electrical

Wellbore telemetering or control

Using a specific transmission medium

3408553, 3408554, 367 78, 175 40, G01V 100

Patent

active

053879074

ABSTRACT:
In a well logging tool forming a data stream for telemetry to the surface, an encoding system is located downhole cooperative with surface located decoding equipment. The encoder converts serial data into NRZ symbols, then duobinary code of seven levels and then into quadrature modulating signals on a complex carrier. The decoder at the well surface receives the quadrature modulated complex carrier, forms inphase and quadrature components and decodes the two components. The decoder includes circuit means removing the intersignal distortion and also intersymbol smearing. This enables very significant telemetry ratio.

REFERENCES:
patent: 3732495 (1973-05-01), McRae et al.
patent: 3814858 (1974-06-01), Parker
patent: 4355310 (1982-10-01), Belaigues et al.
patent: 4384364 (1983-05-01), Henning
patent: 4581613 (1986-04-01), Ward et al.
patent: 4891641 (1990-01-01), Gard et al.
patent: 4901289 (1990-02-01), Cretin et al.
patent: 5010333 (1991-04-01), Gardner et al.
patent: 5091725 (1992-02-01), Gard
Honig & Messerschmitt, Adaptive Filters: Structures, Algorithms, and Applications, 1984, pp. 35-84.

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