[OCCASparky]

And what do you do when you want to COOL them?

[bert]

You drill a shallower hole.

At some point you strike surface water table that is going to be the approximate average temperature and lower than the surface.

[JD_UTDallas]

"And what do you do when you want to COOL them?"

Use adsorption coolers 80C is plenty hot enough for LI/Br or NH3 / Carbon coolers or use a binary organic cycle using geothermal heat and run a turboexpander with the organic Rankin cycle driving a heat pump compressor directly from the turboexpanders shaft output.