The parade of rig conversions in the Marcellus Shale to run on liquefied natural gas (LNG) continues. MDN previously told you about first EQT, then CONSOL switching to duel-fuel LNG/diesel engines. After EQT and CONSOL, Seneca Resources started to convert drilling rigs to run on 100% LNG (see Seneca Boasts First 100% LNG-Powered Drill Rig