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Field Gas Conditioning for Frac Fleets


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Unlike repurposed MRUs offered by others, Pioneer Energy has designed the Pegasus from the ground up specifically to address the unique requirements of this application.

The Pegasus™ field gas conditioner is a trailer-mounted system which conditions field gas for use in dual fuel or electric fracturing fleets.

Traditionally, frac fleets consume large quantities of diesel fuel which must be transported to the site at great expense. The resultant emissions, both from the burning of this diesel fuel in the frac engines, and in transport of that fuel, are significant. Meanwhile, most pads already have a gas midstream connection built out to them by the time the wells are being fracked, ready to accept associated gas from the pad right from initial production. Gas is already flowing through this midstream line from the surrounding wells. However, this is raw associated gas which typically contains significant quantities of heavy (C3+) hydrocarbons.

With the market's increased interest in reducing emissions and improving ESG metrics, many frac fleets have been or are now being converted to run in a dual fuel mode, allowing them to substitute diesel with lean, cleaner burning natural gas if it is available. Many companies are trucking in compressed natural gas (CNG) to reduce the reliance on diesel fuel. However, delivered CNG can still be quite expensive and retains the logistics and emissions footprint from transporting the fuel to the site.

A more ideal approach would be to make use of the field gas already present in the midstream line as a fuel source. This will dramatically reduce the amount of diesel fuel required to be transported to the site and the resultant emissions footprint. It will also represent a significant fuel cost savings, as the field gas can, in many cases, be bought back from the gas midstream for on-pad use at a very low cost.

The Pegasus field gas conditioning system makes this possible by conditioning the gas to near pipeline specifications. This enables the very high diesel substutions rates which are desired in order to maximize emissions reduction and fuel cost savings.

Unlike repurposed MRUs offered by others, Pioneer Energy has designed the Pegasus from the ground up specifically to address the unique requirements of this application.

Pegasus Features & Advantages

Highly Mobile - Trailer mounted with quick and easy disconnects, the system is designed to travel with the frac fleet from site to site. Teardown, transport and setup can be achieved in less than 24 hours.

High Capacity - The unit can accept up to 6 MMscfd of raw gas input (LP configuration) and, depending upon the richness of the raw gas, can output up to 4.5MMscfd (LP configuration) or 3.3 MMscfd (HP configuration) of lean conditioned fuel gas.

High Performance - Able to accept a wide variety of raw field gas compositions, the Pegasus will provide a lean, consistent, continuous output of high quality fuel gas, enabling the highest possible diesel substitution rates. The system will autonomously adapt to changing raw gas supply and fuel gas demand, requiring little to no ramp up time, and it is able to keep up with the most demanding frac stages. Most importantly, the equipment has been designed to never slug the engines.


Liquid Return or Optional NGLs - Either the LP or HP configurations can return a liquid residue to a return line (if available). The LP configuration can also stabilize NGLs onboard, providing the flexibility to produce a truckable y-grade product if desired.

Robust Construction - Built tough to withstand rough oilfield environments and the punishment of regularly occurring deployments and redeployments.

Autonomous - Leveraging Pioneer's sophisticated control software, the unit is designed for complete autonomy, with simple push button controls, minimizing the required attention of field operations personnel.


Remotely Monitored - Real time status and diagnostic information provided from the onboard SCADA system is made available via cellular or local area network connection. Customer or Pioneer technicians can log in remotely for diagnostics and troubleshooting, and status and alerts can be set to automatically push to relevant stakeholders via text message and email.


Safe - Built for full compliance with all relevant oilfield equipment standards, including all ASME code stamped vessels and Class 1 Div 2 compliance, the unit design has also been subjected to a rigorous HAZOP process. The unit is connected on each site with the customer's systems for permissives and emergency stop controls.

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