Oh, wait a sec...
When I broke out roughnecking in the early 50’s most drilling rigs in Oklahoma were power by butane or propane, but if we were near a natural gas pipeline we would hook up to it and buy gas from the pipeline company because it was much cheaper than propane.
With the huge amounts of fuel used in today’s frac jobs I am sure that the use of natural gas would help reduce costs.
I’m sorry but I will have to drive a truck powered by natural gas to see if it has the nuts to pull the hills that my diesel motor can run right over.
Only then will I be a believer.
If it cannot compete with the diesel motor it isn’t saving me anything