Patent ID: 8443900
Filing Date: 2013-05-21
Classification: E21B,F04B

Abstract:
1. A method of unloading water from a natural gas reservoir, comprising: deploying a downhole assembly of a pumping system into a wellbore and within a tubular string disposed in the wellbore to a location proximate the reservoir using a cable having coaxial conductors and a strength sufficient to support a weight of the downhole assembly and the cable, wherein: setting the isolation device, thereby rotationally fixing the downhole assembly to the tubular string and isolating an inlet of the multi-stage pump from an outlet of the multi-stage pump; supplying a direct current (DC) power signal from the surface to the downhole assembly via the cable extending through a bore of the tubular string, thereby: once the water level has been lowered and while the water level is lowered in the tubular string bore: