Oil Giant Goes Deep for Clean Heat: Occidental Drills 4 Miles Underground in Colorado – Fastest Superduper Geothermal Well Yet
The Quiet Revolution Underground: How an Oil Giant Drilled 4 Miles Deep for Geothermal Heat And What It Means for the Future of Clean Energy By: Robert Buluma Date:March 6, 2026 Imagine this: In the flat, oil-soaked plains of Weld County, Colorado—where drilling rigs have long been synonymous with fossil fuels—a massive rig rises quietly last spring. No fanfare, no press releases blasting headlines. Just Occidental Petroleum (Oxy) , the oil behemoth better known for pumping black gold, sinking twin boreholes nearly four miles (about 20,000 feet) into the Earth. Not for oil or gas this time—but for something far more revolutionary: limitless, carbon-free heat from the planet's depths. Completed in under six weeks starting April 2025, this secretive project—dubbed GLADE (Geothermal Limitless Approach to Drilling Efficiencies)—has sent ripples through the geothermal world. Backed by a $9 million U.S. Department of Energy grant from 2022, GLADE wasn't about extracting hydrocarb...