Introducing the HSK78G
Announced as the first solution in the Cummins SPP™ portfolio, a natural gas, variable speed engine designed to power hydraulic fracturing platforms for the well-servicing industry. The HSK78G will be a direct drive solution providing 3,000 brake horsepower from 12 cylinders.
Performance, reliability and efficiency
Diesel-like operations
Compact but powerful
Designed for efficiency
Performance at a glance
Direct drive, variable speed operation
- 3000 BHP output (2.2MW equivalent)
- 12 cylinder design for ease of maintenance
- 78 liter natural gas fuel displacement
- 23,450 kg light package easing integration across rigs
- 190mm x 230mm large bore and stroke design for maximized torque output
- L: 118in x W: 72in x H: 96in compact design offering flexibility for fleet integration
Cummins continues to advance the HSK78G through extensive test cell and frac field operations, reinforcing its proven capability in the field. Recent validation activity has accumulated over 10,000 combined operating hours, with testing focused on durability, load response, and integration within active well-servicing operations.
Duty-cycle data gathered throughout this testing continues to support consistent performance across fleets, demonstrating how the HSK78G is meeting the practical demands of hydraulic fracturing applications.
As the industry’s first variable-speed, large-displacement natural gas engine, ongoing validation is enabling more precise alignment between engine output and operational demand. This capability supports improved operational flexibility and reduced wear, helping operators better match power delivery to dynamic application requirements.
Explore the latest progress of this solution and how this technology is being realized in the field.