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Dual-Fuel Engine For Drill Rigs

Cummins to build dual-fuel QSK engines for land-based drilling applications

Posted on October 16, 2012

Cummins Inc. will produce dual-fuel engines for land-based oil and gas drilling applications. The first engine for land-based drilling applications is the Tier 2 QSK50, rated 103.6 kW at 1200 r/min. Other QSK Series engines will follow, including engines capable of meeting upcoming U.S. Environmental Protection Agency (EPA) Tier 4 Final emissions regulations, the company said.

The Cummins Dual Fuel QSK50 engine will incorporate integrated controls designed to optimize the substitution rate based on operating conditions and automatically transition between diesel fuel and dual fuel modes. Cummins said its dual fuel technology enables drilling equipment to operate on 100% diesel fuel or in dual-fuel mode.

In dual-fuel mode, the substitution rate – the percentage of natural gas relative to total fuel flow – can be as high as 70% in traditional operating conditions, Cummins said.

The Cummins dual-fuel product will be applicable to both new QSK50 engines and as a retrofit on existing QSK50 engines. Cummins global distribution network will handle upfit, commissioning and warranty on dual-fuel engines.