Down-hole liquid detecting apparatus

Details Down-hole liquid detecting apparatus Down-hole liquid detecting apparatus

1990-02-23

1993-08-24

Williams, Hezron E.

Measuring and testing

Liquid analysis or analysis of the suspension of solids in a...

Content or effect of a constituent of a liquid mixture

73151, 250565, 2503385, 324696, E21B 4704, G01N 2706, G01N 2117

Patent

active

052378578

ABSTRACT:
The probe (20) includes a conductivity sensor (38) and an optical sensor (39) for detecting the depth of a layer of oil, gasoline, etc floating on the surface of water in a well. A battery (60) is included in the probe, and a resistor (R1) is provided in series with the conductivity sensor. When the probe is in oil, both sensors are OFF, and no voltage is detectable at the surface; when the probe is in air, the optical sensor is ON and the conductivity sensor is OFF, so that a maximum voltage is detectable at the surface; and when the probe is in water, the optical sensor is OFF and the conductivity sensor (with its resistor) is ON, so that an intermediate voltage, as set by the value of the resistor, is detectable at the surface.

REFERENCES:
patent: 1721374 (1929-07-01), Dantsizen
patent: 2607220 (1952-08-01), Martin
patent: 2669875 (1954-02-01), Wuenscht
patent: 4523465 (1985-06-01), Fasching et al.
patent: 4624309 (1986-11-01), Schnatzmeyer
patent: 4703314 (1987-10-01), Spani
patent: 4747451 (1988-05-01), Adams, Jr. et al.
patent: 4920336 (1990-04-01), Meijer

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