Since this is a homemade heat pump thread, I feel obligated to look at this through that lens.
I find that this idea may be worth discussing, but not in a thread that is dedicated to DIY.
The web page that is referred to states:
Quote:
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...the GeoColumn can be installed with standard caisson or utility pole type drilling equipment...
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Let's get honest folks, no one on this blog is going to fabricate caisson drilling equipment.
This thread is not for sci-fi, it is for things we can actually make or modify ourselves.
-AC_Hacker