Gat, your response puts that argument to rest. HFR is of much...

Gat, your response puts that argument to rest. HFR is of much greater potential than HDR, simply because an HFR project flows as a result of the pressure on the in-situ fluids.

Ohmygod, your point regarding pumps is valid in a commercial sense. Pumps that can operate at well over temperatures and pressures we are dealing with can be made, but they are exotic and cost an arm and a leg. I just had a chat to a bloke from Ajax, he said the real limitation is getting custom made valves and gaskets. They can be made, but the price 'is likely' be inhibitive.