Hey guys, I discovered that 40,000 PSI or even 100,000 PSI is not an area that oil engineers (drilling) are unfamilar with. Google "High Pressure Equipment," they have oil components and other valves that can deal with pressure up to 160,000 PSI! Perhaps the "PSI" concern that commentators have is a bit over blown? Hope this eases some concerns. By no means am I understating the other factors, such as harmful gas's, damage to local's, marine and other habitat, etc..