Oil well level sensor

Details Oil well level sensor Oil well level sensor

E - Fixed Constructions

21

B

342/15

E21B 43/00 (2006.01) E21B 47/00 (2006.01) E21B 47/04 (2006.01)

Patent

CA 1335515

A system for controlling production in an oil well comprises a first level sensor mounted upon the outer surface of the tubing near the lower end of the tubing and a second level sensor mounted upon the outer surface of the tubing above the first level sensor. The first level sensor is tuned to a first electrical signal frequency. The second level sensor is tuned to a second electrical signal frequency. A control device at spaced intervals transmits electrical signals of the first and second frequencies down the oil well and senses the liquid level by detecting impedance.

573825

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