HOUSTON -- Alternative uses of natural gas may be catching on in the nation's oil patch more quickly than in the long haul trucking fleet. For the past few years, natural gas producers have been eager to find new markets for selling their huge supplies, worried as they are about future business prospects in the face of very low North American gas prices. Companies such as Chesapeake Energy Corp. have been advocating for a transformation of the trucking fleet to gas, particularly liquefied natural gas (LNG), and hundreds of LNG and compressed natural gas fueling stations are being built. But increasingly, oil and gas companies are becoming their own customers, collecting the gas they're producing in the oil patch to power their trucks, generators and even the drilling rigs.