Patent ID: 8408312
Filing Date: 2013-04-02
Classification: E21B,F04D,H02K

Abstract:
1. A method of unloading liquid from a reservoir, comprising: deploying a pumping system into a wellbore to a location proximate the reservoir using a cable, wherein the pumping system comprises a multi-section motor, an isolation device, and a pump; supplying a power signal from the surface to the motor via the cable and sequentially operating each section of the motor to mimic a multi-phase motor, thereby driving the pump and lowering a liquid level in the tubular string to a level proximate the reservoir; and setting the isolation device before or as a result of supplying the power signal, thereby rotationally connecting the pumping system to a tubular string disposed in the wellbore and isolating an inlet of the pump from an outlet of the pump.