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What Sets DHI's DGWS Systems
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DHI's RFI system is installed
on the bottom of the tubing string above the tubing
on and off tool which is above a standard packer. DHI's
packer is installed below the production zone perforations
to isolate the production zone from the water injection
zone perforations. A conventional API insert or tubing
pump (DHI is the only provider of tubing pump style)
is seated or installed into the DGWS system. In the
production casing annulus, gas and water separates naturally
by gravity. The separated gas flows up the annulus to
the surface and the brine water in injected below.
DHI's Next Steps
Water is drawn into the intake of the system by the
pump discharged out of the top of the pump out of the
discharge housing and into the RFI outer barrel. An
example of two fluids that are most commonly isolated
by the DSB tool is disposal water and the tubing/rod
fresh inhibited fluid. The pump then forces the water
back down around the outside of the pump barrel, through
the BSM tool, the on/off tool and packer and into the
lower injection zone.
DHI does not offer the bypass manifold alone. DHI does
offer the bypass manifold as an integral part of a complete
DGWS system.
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The primary function of the
DSB tool (shown to the right) is to downhole isolate
two separate fluids under dissimilar pressures. An example
of two fluids that are most commonly isolated by the
DSB tool is disposal and fresh inhibited fluid. The
DSB tool is positioned downhole and most commonly above
the pump. However, the DSB tool can also be located
below a pump or a series of pumps. There are many DGWS
advantages for isolating these two fluids. The advantages
can be elaborated on and are briefly listed below:
- Zero Injection
Pressure at the Surface
(No surface spills - Extends the life of the
surface stuffing box)
- Holds the Tubing
with Fresh Inhibited Water
(No need to treat tubing and rods - Less tubing/rod
friction - Provides a rod coolant)
- Lowers Peak Torque
Requirements
(Less rod stress/longer life - Less power
consumption)
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Load Cell Technology
DHI's load cell technology provides partial and severe pump
off control. The load cell installs on the polished rod between
the bridal and rod clamp. The minimum and maximum polished
rod load can be read easily from a load indicator on the load
cell. There are no welding or special brackets required. The
load cell is rugged, all-weather, water proof and is insensitive
to temperature changes.
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