Ohm drill

After a starter hole has been drilled to get past all the water tables ect, use an ohm drill to drill down to the reqired depth for geothermal energy production.

Here's how it will work. Imagine a circle about 10" diameter, around it are smaller circles which collectively have the same area as the 10" circle, the smaller circles don't touch the big circle but are spaced evenly apart from each other and the big circle, now around the whole thing place another circle also evenly spaced the same distance as the others, the first joint of pipe will have a larger outside diameter for the first foot or so enabling the rest of the pipe to be electrically insulated. this is the cross section of the pipe that will be used.

Now make the pipe out of tungsten so that it is heavier than the surounding rock.

To drill simply pump huge currents into the ground through the small (relativly speaking) area at the end of the drill string, ohmic heating (hence the namesake) causes the ground to melt and the massive weight of the drill then sinks due to displacement of the lighter rock when the total depth has been reached turn off the generators let the ground cool enough to harden or at least wait untill the drill stops sinking may need a large anchor on the bedrock to stop it.

Once it is stopped the power plant can be built over it and the working fluid may then be dropped down the annular holes as it falls the center will fill up with the hotter fluid and heat differential will then be the driving force, as the super heated fluid nears the surface it eventually boils and by the time it reaches the surface it will be all steam moving very fast and can then be used to drive a turbine or if conductive some solid state device. I will leave it up to you to figure out what to power with the now available heat engine.

Additionally since it is a closed system you have more flexability in what you could use as working fluid.