I have used cesium formate drilling fluid one time in an uneconomic effort to prevent formation damage. It was the same price per barrel as unobtainum.
There were two rocket fuel plants built back in the 60s and I don’t think the fuel from either one was ever used. One was in Muskogee, Oklahoma and the other was near Neosho, Missouri. I know the fuel from the plant at Muskogee not used and the plant was torn down. Never did know the full plan, product or problems.
I still believe there was access to alien technology to build the SR-71. :)
I still believe there was access to alien technology to build the SR-71