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Chemical Injection Pump

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Evergreen’s Power Pod (patent pending) technology addresses a significant oil and gas industry problem: the use of gas venting pneumatic pumps and instruments result in lost revenue and high GHG emissions. Pneumatic pumps, the largest part of the problem, are typically used to inject methanol into natural gas production facilities in order to prevent hydrate formation. Most wells are not on the electric grid, and normal practice is to use natural gas driven pneumatic pumps to inject the methanol. This type of pump uses the pressure energy of the produced gas to operate the pump, and then vents the spent gas to the atmosphere. The energy that could have been derived from combustion is wasted. Furthermore, the vented gas stream is largely methane, a high impact GHG.

Some sour gas wells use bottled propane as the pressure source, significantly more costly than produced natural gas.

Electric injection pumps driven by solar energy have been used successfully in the US, but the low solar flux experienced during Canadian winters results in low reliability here. In recent years, Direct Methanol Fuel Cells have become commercially available. DMFC cells are reasonably efficient, and consume methanol, a fuel readily available at field locations. These considerations led Evergreen to develop a hybrid system combining DMFC and Solar as a power source. The solar cell provides power when it can, and is backed up by the fuel cell during times of low solar flux.

Evergreen’s Power Pod is a completely new approach that can be used to replace pneumatic devices at well sites. In its most basic form, electricity is generated in a hybrid combination of DMFC and Solar, stored in batteries, and used to power an electronically controlled solenoid injection pump, as well as other equipment. The equipment is contained in a climate-controlled enclosure to ensure operability in extreme weather.
Some examples of economics and GHG emissions reductions for this type of application are shown here.