What Is Gas Well Dewatering

Gas Well Dewatering,” or “Gas Well Deliquification” (GWD), is the general term for technologies used to remove water build-up (hydrostatic head) from producing gas wells. When natural gas flows to the surface in a producing gas well, the high velocity of the gas carries liquids to the surface in a mist flow pattern.  As the gas velocity in the production tubing drops with time, the velocity of the liquids carried by the gas declines even faster. Eventually, the hydrostatic head accumulates in the bottom of the well.  This condition can either slow or kill gas production altogether.

THE JJ TECH GWD SOLUTION
With JJ Tech’s Jet Pump with concentric tubing strings; formation fluids are produced up the inner annulus and the gas up the outer casing and tubing annulus.  This method allows the gas production to achieve a constant, steady production rate.

HOW THE SOLUTION WORKS
The JJ Tech hydraulic Jet Pump utilizes the Venturi effect to pull well bore fluids into a flow stream that is pumped down-hole and back up again through a concentric string configuration.  The key components of the Jet Pump assembly are flow-reversible and, therefore, do not require a service rig intervention to be retrieved, inspected, serviced or changed.  Pump component change-outs are a one-man operation that requires only one to two hours to perform.  The Jet Pump can be run on the end integral joint or  coiled tubing inside of standard production tubing.

The innovative, patented JJ Tech hydraulic Jet Pump design uses larger fluid input areas and cleaner flow geometries, allowing operation with efficiency equivalent to or greater than conventional artificial lift systems.  These features also facilitate the movement of solids, i.e. sand through the jet pump, making it ideal for production with high solid content.

JJ Tech’s Jet Pump is the downhole component of the company’s patented ULTRA-FLOW production system.  It is combined with a T100 series high pressure diaphragm surface pump, developed for JJ Tech by Wanner Engineering, Inc.  This rugged, reliable pump greatly reduces environmental and maintenance issues associated with conventional triplex pumps.  The T100S, rated at 5000 PSI and 905 BPD is well-suited for concentric string completions used with gas well dewatering, where smaller fluid conduits require higher pressures due to fluid friction through the smaller strings of pipe.

The Wanner surface pumps are closed systems with cartridge-type check valves and diaphragms for ease of maintenance and lower operating costs.  Units are configured with natural gas engines or electric motors with variable-frequency drives (VFD’s) to reduce operating costs and pump wear.

ADVANTAGES OF JJ TECH GWD SOLUTION

•    No moving parts downhole
•    Large volumes of fluid moved with moderate to high solid (sand) content
•    Increased production rates as hydrostatic head is reduced
•    Increased recoverable reserves as more gas can move into the well bore
•    Proprietary software provides formation monitoring and performance optimization
•    Can be ran horizontally

Download JJ Tech GWD Presentation