Wells – With electrical means
Patent
1985-09-18
1987-03-17
Leppink, James A.
Wells
With electrical means
166 664, 175 50, 25112921, E21B 3416, E21B 4706
Patent
active
046499938
ABSTRACT:
A surface controlled electrically operated solenoid subsurface safety valve is positioned in a well tubing in a well and controlled by an electrical control line extending from the solenoid coil to the well surface. One or more measuring sensors are positioned in the well for measuring a physical property of the well. The input of the sensor is connected to the control line for receiving electrical power and the output of the sensor is connected to the control power for supplying an output signal proportional to the measurement of the physical property. The output signal is distinguishable from the electrical supply current to the solenoid coil. A signal processor at the well surface receives the sensor output. Preferably the sensors are connected in parallel with at least a portion of the solenoid coil.
REFERENCES:
patent: 3692106 (1972-09-01), Basham et al.
patent: 3930220 (1975-12-01), Shawhan
patent: 4161215 (1979-07-01), Bourne, Jr. et al.
patent: 4191248 (1980-03-01), Huebsch et al.
patent: 4284943 (1981-08-01), Rowe
patent: 4355365 (1982-10-01), McCracken et al.
patent: 4520468 (1985-05-01), Scherbatskoy
Camco Incorporated
Leppink James A.
Melius Terry Lee
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