Basement rock hybrid drilling

A method comprising:

• monitoring a downhole pressure of a well during formation of a borehole of the well using a millimeter wave drilling apparatus including a waveguide configured for insertion into the borehole, the monitoring including determining the downhole pressure, wherein the downhole pressure includes an amount of pressure present at a bottom of the well;
• determining a lithostatic pressure of rock surrounding the well at the bottom of the well;
• and
• controlling the downhole pressure relative to the lithostatic pressure of the rock surrounding the well at the bottom of the well, wherein controlling the downhole pressure further comprises providing a gas compressor at a surface of the well, the gas compressor configured to supply a gas into the borehole of the well and a means for controlling the downhole pressure, the means for controlling the downhole pressure controlling one or more operations of the gas compressor by controlling an input valve position of the gas compressor, an output valve position of the gas compressor, a back pressure of the gas compressor, and a flow rate of the gas supplied by the gas compressor.