Multiplex submersible pump telemetry system

Details Multiplex submersible pump telemetry system Multiplex submersible pump telemetry system

G - Physics

01

V

324/8

G01V 3/18 (2006.01) G01V 9/00 (2006.01)

Patent

CA 1217815

ABSTRACT OF THE DISCLOSURE A submersible well pump has a system for monitoring parameters such as pressure and temperature in the vicinity of the motor. The system includes a downhole assembly in the well that has a transmitter for generating a carrier signal and superimposing that signal onto the power cable. Transducers in the downhole assembly sense physical parameters and provide a change in resistance corresponding to the physical parameters. These transducers are connected to a modulator which modulates the carrier signal according to the resistance. A shift register in the downhole assembly sequentially shifts a reference resistor and two or more transducers into the modulating circuit to provide envelopes on the carrier signal corresponding to a synchronizing signal and to data being sensed. The modulated carrier signal is demodulated at the surface into separate channels, where each can provide a readout proportional to the physical parameter sensed.

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