Email this page Email Print this page Print Feed Feed

Drilling With Dual-Fuel Technology

Installation of dynamic gas blending kit leads to fuel savings, eliminates operational downtime

Posted on September 9, 2013

Caterpillar Inc. has supplied Southwestern Energy Co. with two Cat 3512C dual-fuel generator sets with EPA-approved dynamic gas blending (DGB) kits on a drilling rig operating in the Fayetteville Shale Play.

Featuring a 60 hz, 1.0 eMW drilling rating, the Cat dual-fuel solutions powered the drilling of eight wells over the course of 45 days, saving Southwestern Energy more than an estimated US$100 000 in fuel costs, the company said.

Cat said some of the key factors in realizing these savings were 100% availability of gas and no increase in unexpected downtime.

The Cat DGB system is CARB-certified for use with fuels with a lower heating value (LHV) of between 905 BTU/scf to 1250 BTU/scf, giving operators a wide range of fuel options while meeting Tier 2 emissions levels, the company said.

Additionally, the Cat DGB system was recently approved by the EPA as a field fix that allows the installation of the DGB kit to convert the diesel engine to run on a combination of diesel/natural gas – the EPA approval applies to the DGB kits for land drilling and well stimulation applications.