Geothermal best seals for downhole tools handle 700°F and 15,000 PSI in super-hot wells. Special FFKM + PEEK spring-energized design maintains seal after 1000-hour exposure. Zero degradation in supercritical steam. Geothermal developers rely on the best seals for downhole tools that conquer extreme heat. https://globalsealstech.com/product-category/oil-gas-seals/downhole-completion-tools-seals/