Communications: electrical – Wellbore telemetering or control – In horizontal or inclined passage arrangement
Patent
1988-10-14
1989-10-24
Steinberger, Brian S.
Communications: electrical
Wellbore telemetering or control
In horizontal or inclined passage arrangement
340858, G01V 100, E21B 2902
Patent
active
048765392
ABSTRACT:
An apparatus for measuring one or more parameters of the subsurface environment, and telemetering one or more parameters of the subsurface environment to the surface. Apparatus at the surface includes a source of intermediate frequency and voltage, electrical energy for transmission down one or more conductors of a power cable or separate instrument wire to a downhole instrument package. This intermediate frequency voltage is converted to a power supply voltage for generating a high frequency FM signal, in accordance with the magnitude of one or more parameters of the environment. This frequency modulated signal is sent to the surface over the conductors of the power cable and ground. At the surface the signal is demodulated to produce a signal indicative of the transmitted parameter.
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Steinberger Brian S.
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