Patent ID: 8276658
Filing Date: 2012-10-02
Classification: E21B

Abstract:
1. An apparatus for producing fluids in a wellbore wherein gas is produced through one annular space and fluids are produced through a separate space; wherein the apparatus comprises: a. casing in the wellbore; b. production tubing within the casing; c. a hydraulically driven downhole pump within the production tubing and attached to the distal end of a multi-channel coiled tubing string that extends to the surface of the borehole; d. a hydraulic power unit disposed at the surface and connected to the multi-channel coiled tubing string so as to provide high pressure hydraulic fluid into a first channel within the multi-channel coiled tubing string and receive hydraulic fluid through a second channel within the multi-channel coiled tubing string and together define a closed loop hydraulic fluid system where hydraulic fluid is not mixed with production fluids; whereby a fluid production space is defined within the production tubing and outside the multi-channel coil tubing driven by the hydraulically driven downhole pump and further whereby a gas production space is defined outside of the production tubing and within the casing and further wherein the first channel is characterized by non-metallic, corrosion resistant interior surfaces; e. wherein the hydraulic power unit includes a power take off device and for a gas compressor for compressing the produced gas from the well site using a single power unit; f. wherein the hydraulic power unit provides a continuous supply of high pressure hydraulic fluid through said first channel of said coiled tubing string and continuously receives lower pressure hydraulic fluid from said second channel of said coiled tubing string into a reservoir; and h. a heat transfer device for heating the hydraulic fluid and thereby heat the wellbore to prevent ice from forming and maintain any paraffinic hydrocarbons above their cloud point wherein the heat transfer device is a liquid/liquid heat exchanger where coolant from an internal combustion engine that is used to drive the hydraulic power unit is arranged to provide some of the heat in the coolant to the hydraulic fluid pump.