Downhole compressor system with a feedback sensor

Details Downhole compressor system with a feedback sensor Downhole compressor system with a feedback sensor

2005-09-06

2005-09-06

Ro, Bentsu (Department: 2837)

Electricity: motive power systems

Automatic and/or with time-delay means

Speed or rate-of-movement

C417S024000, C175S101000

Reexamination Certificate

active

06940245

ABSTRACT:
A downhole compressor system is disclosed for assisting in extracting gas from the well. The system comprises a compressor14, an electric motor10for driving the compressor14which motor has a stator winding and a rotor12and, in use, is lowered into the well together with the compressor. A control system18, which when in use is disposed outside the well, is connected to the stator winding for controlling the current supply to the motor10. The control system18receiving a signal indicative of the speed and phase of the rotor from a feedback sensor16mounted for rotation with the rotor12. In the invention, the feedback sensor is a current generator having a permanent magnet16amounted for rotation with the rotor12and a second stator winding16bconnected to the control system18.

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