Introduction

What are technologies are needed to build a deep, hot, dry, geothermal well?

Here I've gathered my notes on high temperature electronics and sensing (200°C to 500°C) and it's application to geothermal energy.

I'm approaching this from a non-expert who wants an answer to the following question: "What technologies are needed to build a deep, hot, dry, geothermal well".

What is missing, and is there any way to help the process, either technically or through greater public awareness?