The Kola Superdeep Borehole is the result of a drilling project on the Kola Peninsula in northwestern Russia. The deepest borehole in Kola, SG-3, reached 12,262 meters in 1989, and is the deepest hole ever drilled by geologists, and the deepest artificial point on the planet. For almost 20 years it was also the longest borehole on Earth, in terms of measured depth along the well bore, until overtaken in 2008 by 12,289 meter deep Al Shaheen oil well in Qatar, and in 2011 by the 12,345 meter deep Sakhalin-I Odoptu OP-11 offshore well (off the Russian island Sakhalin).