This 2017 Keystone Oilfield Fabrication LLC oilfield trailer — sometimes referred to as a frac sand silo trailer — is a purpose-built bulk storage and transfer system designed for use in hydraulic fracturing operations. It is configured to receive, store, and dispense frac sand delivered by pneumatic bulk tanker trucks at the wellsite.
The system comprises a total of six silos, each with an individual capacity of 4,000 cubic feet, giving a combined storage volume of 24,000 cubic feet. The silos are engineered specifically for frac sand, a particularly dense material; for context, a standard pneumatic tanker carries approximately 50,000 pounds of sand, which equates to roughly 750 cubic feet. Each silo is therefore sized to hold the equivalent of five full pneumatic truckloads, making the complete six-silo system capable of storing the output of thirty truck deliveries simultaneously.
Unloading is handled pneumatically by the delivery trucks themselves. Each truck backs up to a silo and connects a hose to pipes running down the exterior of the unit; the truck's onboard blower then pushes the sand up the pipe and into the top of the silo. A full 50,000-pound truckload can be transferred in approximately 20 to 25 minutes. Multiple trucks can unload into separate silos concurrently, provided they can physically reach their respective connection points. The dust-control system is integrated into the silos themselves, while the pneumatic blower equipment remains on the delivery trucks.
Transport of the complete system requires seven power-only trucks and two flatbed trailers. The silo bases measure 10 feet wide by 40 feet long and are described as legal loads. Loading the bases onto flatbeds requires a pole truck. The unit is offered used and is located in Texas, USA.
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