1990-04-05
1991-09-17
Novosad, Stephen J.
Wells
Automatic
73155, 166 651, 166105, 166369, 340856, 417 36, E21B 4300, E21B 4706, F04B 4906
Patent
active
RE0336904
ABSTRACT:
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.
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Adams, Jr. Harold P.
Banton William E.
Hill David R.
Maitland Andrew B.
Richey Lee M.
Novosad Stephen J.
Oil Well Automation, Inc.
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