The presented article reviews the history of drilling deepest well in world, located northeastern part Early Proterozoic Pechenga structure (Kola Peninsula). In 1990, Kola Superdeep Borehole (SG-3) reached a record depth 12,262 m. SG-3 fully completed all assigned tasks, both technical and scientific terms. 4024 linear meters core were extracted, including drill samples from depth. Overall, who...