Electronic controller by resistivity of water-oil interface

Details Electronic controller by resistivity of water-oil interface Electronic controller by resistivity of water-oil interface

1986-11-20

1991-01-15

Orsino, Joseph A.

Communications: electrical

Condition responsive indicating system

Specific condition

340620, 73304, 73304R, 73 61R, 210519, G08B 2100, G01F 2300

Patent

active

049856960

ABSTRACT:
An electronic interface controller is disclosed. The controller is particularly suited for use in controlling dehydration processes of light, heavy and extra heavy crude oils on the basis of the interface between the oil and water. The controller includes sensor elements which generate a signal representative of current flow between the sensors to indicate the conductivity of liquids between the sensors. A first device, responsive to a current flow signal from the sensors, generates a control signal according to the conductivity of liquid in contact with the sensors. A timer is provided for delaying a control signal generated by the first device for a delay period between 0 and 180 seconds. First and second comparing devices are each responsive to a current flow signal from the sensors to respectively generate a high interface level alarm signal when the conductivity of liquid in contact with the sensors exceeds a predetermined high value and to generate a low interface level alarm signal when the conductivity is below a predetermined low value.

REFERENCES:
patent: 3626399 (1971-12-01), Akeley
patent: 3704724 (1972-12-01), Holbrook
patent: 4304132 (1981-12-01), Snaper
patent: 4459584 (1984-07-01), Clarkson
patent: 4637254 (1987-01-01), Dyben
patent: 4638305 (1987-01-01), Sutton
patent: 4722800 (1988-02-01), Aymong

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