Passage: The Kola Superdeep Borehole (Russian) shine sakamakon aikin hako kimiyya na Tarayyar Soviet a gundumar Pechengsky, a kan Kola Peninsula. Aikin ya yi ƙoƙari ya haƙa zurfin zurfin zurfin cikin ƙashin ƙasa. An fara hakowa a ranar 24 ga Mayu 1970 ta amfani da Uralmash-4E, kuma daga baya jerin drilling na Uralmash-15000. An haƙa ramuka ta hanyar rarraba daga rami na tsakiya. Mafi zurfin, SG-3, ya kai mita 12,262 (40,230 ft; 7.619 mi) (Buƙatar tabbatarwa. Dangane da alamun da aka rubuta a kan ramin, zurfin ramin yana da zurfin 12,226 m, 1989 ) a zurfin kuma shine mafi zurfin zurfin ƙasa, kamar na Mayu 2019.
Rami Mai Zurfi na Kola