Fusion tech finds geothermal energy application

Current state of deep geothermal

• Existing geothermal research projects (e.g., Utah FORGE) reach ~3 km depths but are not yet broad commercial deployments.
• Enhanced geothermal is emerging: one project drilled injector/producer pairs, fracked between them, and demonstrated ~3 MW gross (≈2 MW net) with plans for ~8 MW net per well pair.
• 3 km depth is common for modern oil & gas wells; drilling technology and workforce are seen as transferable to geothermal.

Microwave / gyrotron drilling concept

• Proposed system uses millimeter‑wave energy from the surface to vaporize rock, with purge gas (nitrogen/air/argon) carrying recondensed ash to the surface.
• Supporters highlight continuous drilling (no tripping pipe), reuse of fusion gyrotron tech, and potential to reach >10 km where rock is very hot.
• Skeptics note prior ultra‑deep projects (e.g., ~12 km in Siberia) failed partly because rock behaved plastically and boreholes closed when drill strings were removed; they question how this approach avoids similar issues and whether cooling is adequate.

Borehole quality, debris, and safety

• Concern that vaporized rock could re‑deposit on the waveguide or walls and seize equipment; proponents say it will mostly condense as fine ash and be blown out.
• Photos of lab holes show rough, melted walls that might make casing difficult; unclear how this scales in the field or whether casing is needed.
• Pressure control is a major unknown: traditional wells use drilling mud to manage blowout risk, while this approach proposes pumping gas and “extracting gas,” raising questions about blowouts or steam explosions (BLEVEs).

Geothermal system longevity and scaling

• Geothermal described as “heat mining”: individual wells cool locally over decades; replenishment is limited by rock thermal diffusivity.
• Some worry about long‑term planetary cooling; others argue Earth’s heat content and radiogenic heating dwarfs any plausible human extraction.

Complementary geothermal technologies

• Another startup approach: injecting a thermally conductive slurry (likely graphite‑based) into fractures around a single well to reduce thermal resistance and boost heat transfer, potentially useful even in depleted oil/gas wells.
• Mineral scaling and clogging in geothermal plumbing is raised as an unresolved practical problem.

Relation to other energy options

• Many participants see deep geothermal as a “sleeping giant” that leverages oil & gas skills, with strong political upside.
• There is debate over whether geothermal must beat nuclear vs merely be “good enough.”
• Broader thread diverges into fusion timelines, renewables + storage, and capitalism’s tendency to favor fast‑scaling SaaS over capital‑intensive hard tech.