Two receiver noise loggers

Details Two receiver noise loggers Two receiver noise loggers

1981-01-02

1983-06-28

Buczinski, S. C.

Communications: electrical

Wellbore telemetering or control

In horizontal or inclined passage arrangement

181103, 181112, 369 32, 455103, G08C 1900

Patent

active

043908780

ABSTRACT:
Disclosed is a system for acoustic noise logging in a production well which includes up-hole components and down-hole components including at least two sonic detectors, the up-hole and down-hole components being linked together by a four-wire interconnecting means. In addition, the down-hole components include at least three additional parameter detectors. These additional parameter detectors may include a temperature detector, a conductivity detector and a location detector. The first of these detectors produces a frequency proportional to, for example, temperature. The second detector frequency modulates the temperature signal, for example, in response to location. The third detector amplitude modulates the signal depending on whether or not a conductivity threshold has been exceeded.
The foregoing permits simultaneous monitoring of a plurality of down-hole parameters simultaneously without the necessity for multiplexing and yet employs only a four wire interconnecting means.

REFERENCES:
patent: 4114721 (1978-09-01), Glenn, Jr.

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