I'm surprised with your fossil background you don't realize that geothermal mining techniques led the way for deep well hydro fracturing.. AND a lot of experience in horizontal drilling as well. LOTS of fluid pushed down into man-made fissures to generate the steam.
You got me I guess. I have never seen anyone say that the technology for hydraulic fracturing in 1947 was derived from geothermal based ideas. Or that the horizontal wells first drilled in the late 19th century in Ohio (okay fine, Texas City, 1927 if you want to talk about modern cased hole horizontal drilling) were derived from this stuff either.
You do realize that the wooden casing often used near Macksburg Ohio in the 1880's means that they couldn't handle hot fluids and whatnot very well,so I don't see how knowledge in drilling geothermal wells between then and, say, the Civil War led to this technology.
flacaltenn said:
Like I said man. I'm ALL FOR IT -- with the same REALITIES and RESTRICTIONS we have on other fracking operations. And for THIS -- the siting issues are even more intense. Since blow-outs at these thermal sites can spew a circle of toxic gases and liquids for a half mile or more radius..
Google Hawaii geothermal blowout --- for instance. Or geothermal "circle of death"..
I've spoken with company men who drilled geothermal wells in Hawaii. They thought it was quite a test of their capabilities, but they didn't describe blowouts or dying or anything from these events.
But I am interested in how the geothermal drillers were ahead of the oil and gas drillers.