G - Physics – 01 – F
Patent
G - Physics
01
F
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G01F 23/22 (2006.01) E21B 41/00 (2006.01) E21B 47/04 (2006.01) E21B 47/10 (2006.01) G01F 23/00 (2006.01) G01F 23/24 (2006.01) G01F 23/292 (2006.01)
Patent
CA 2010864
- 34 - Abstract of the Disclosure TITLE: DOWN-HOLE LIQUID DETECTING APPARATUS 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. (Fig 2)
Belshaw Douglas James
Belshaw Richard John
Dobson Andrew Robert
Asquith Anthony
Solinst Canada Limited
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