Frac pump driven with 3,000HP electric motor through a 9 – speed powershift transmission.
Low power warm up system, with use of the pony motor only.
– This feature will allow us to warm up both the transmission oil, and the lube pump oil.
– This is particularly important in cold conditions, since the frac pump oil will be warm before it starts up. This will end power end failures due to cold oil/ poor lubrication at cold start up.
No complicated/ fragile VFD control unit required. The 3,000HP frac pump drive motor always runs at synchronized speed.
– No high inrush current occurs when starting the large motor, since it is driven to synchronize speed before starting and starts at “no load”. Only nominal “no load” amps are used to start in this condition, only 74 amps at 4160 V.
No speed dip when changing gears in the transmission.
– The inertia of the 3000 HP keeps its speed constant during shifting, which allows for very smooth shifting, even while the power end is under high pressure, high HP loading.
Cooling for both the transmission and lube oil controlled by thermostatic by-pass valves, so oil stays at design temperatures.
– Cooling provided by two chambers, one motor/fan air to the oil cooler.
Unit has a SlowFlo feature that allows operation from -0- to 200 RPM, through all 9 gears of the transmission.
– This allows the operator to easily conduct line pressure test.
– It also allows infinitely controllable speed control of the power end, for an output flow between -0- to 1.4 barrels/minute, as required by the operator.
Operator can power shift the transmission when needed, even “skipping” between gears if needed.
Unit can actually pump output flows and pressure following a high HP curve due to the 9-speed transmission, and no speed decrease by the prime mover.
The Transmission has small and evenly spaced gear ratio steps to ensure that well pressure does not drop during gear shifts.
Designed specifically for the pressure pumping market, the transmission does not require throttle dipping for any of the range-to-range shifts.
– The transmission is designed to be power shifted under all loaded or unloaded situations.
Transformer: oil units appear to be the better option overall with higher energy efficiency, recyclability, low noise pollution, lower operational costs and a small environmental footprint.