Fervo, the enhanced geothermal company, has drilled Sawtooth 7, a 19,448-foot-deep well, one that includes a 7,500-foot span laterally across the subsurface. It took just 21 days to drill, which was the same amount of time it took to drill the smaller Phase I wells. By comparison, the company’s Project Red well in Nevada hit a depth of 11,220 feet in 70 days. The numbers are looking better and better for geothermal; costs are on track to get down to $5,500 per kilowatt, which is progress from the $7,000 per kilowatt costs of its Cape Station wells and on track for the target of $3,000 per kilowatt in the long term.
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