Communications: electrical – Wellbore telemetering or control – Pulse or digital signal transmission
Patent
1988-12-29
1990-01-02
Steinberger, Brian S.
Communications: electrical
Wellbore telemetering or control
Pulse or digital signal transmission
G01V 140
Patent
active
048916412
ABSTRACT:
The present invention provides an improved method for transmitting logging data from a logging apparatus operating in a well borehole to surface equipment over a logging cable. The logging data has variations in amplitude, which are converted to a frequency-modulated signal. The center frequency of the frequency-modulated signal is relocated to a lower frequency, which is within the bandwidth of the logging cable. The frequency-modulated signal is transmitted over the logging cable and received by the surface equipment, where the logging data is reconstructed.
REFERENCES:
patent: 4035763 (1977-07-01), Cowles
patent: 4468665 (1984-08-01), Thawley et al.
patent: 4631536 (1986-12-01), Ward et al.
patent: 4796026 (1989-01-01), Hammond
Gard Michael F.
Kyle Donald G.
Atlantic Richfield Company
Mantooth Geoffrey A.
Steinberger Brian S.
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