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GE Receives EPA ‘Mobile Certification’

Waukesha technology enables firms to replace diesel units with lower cost, cleaner gas engines for oilfield power generation

Posted on August 26, 2013

GE announced that the U.S. Environmental Protection Agency (EPA) has certified two of the company’s Waukesha natural gas-fueled engine models for mobile, non-road applications.

The company said its gas-fueled engines offer a choice for powering drill rigs and oilfield equipment in place of older diesel units. The company said powering a drill rig with natural gas instead of diesel fuel can result in up to 80% lower fuel costs.

Patterson-UTI Drilling replaced existing diesel systems with three Waukesha VHP L7044GSI gas engines at a well site in Harrison County, West Virginia, U.S.A. These units received EPA permit exemptions pending the agency’s mobile certification ruling. Patterson-UTI and GE are also working to replace additional diesel units with EPA-certified Waukesha L7044GSI-EPA engines in other locations in Ohio and Colorado, U.S.A., the company said.

GE said that Oklahoma City, Oklahoma, U.S.A.-based Devon Energy recently selected GE’s integrated Power to Lift solution – which includes a Waukesha L5794GSI natural gas engine that also received an EPA permit exemption – to power electric submersible pump operations.

The VHP L7044GSI-EPA and L5794GSI-EPA Waukesha gas engines can be exchanged with existing rig power generation drivers, offer cost advantages of natural gas vs. diesel and dual-fuel, and can run on a greater variation of available fuel sources including dry field gas, pipeline gas, LNG and propane, GE said.

With performance ratings at altitudes up to 2438 m with no de-rate, GE said the L7044GSIEPA and L5794GSI-EPA models use non-selective catalyst reduction (NSCR) technology – commonly referred to as a three-way catalyst (TWC) – achieving very low NOx, CO and VOC values.