page_title: Kola Superdeep Borehole
hierarchical_section_title: Kola Superdeep Borehole
caption_attribution_description: Русский: Кольская сверхглубокая скважинаEnglish: Kola Superdeep Borehole
context_page_description: The Kola Superdeep Borehole is the result of a scientific drilling project of the Soviet Union in the Pechengsky District, on the Kola Peninsula. The project attempted to drill as deep as possible into the Earth's crust. With a depth of 12,262 metres, it has been since 1989 the deepest artificial point on Earth.
  Drilling began on 24 May 1970 using the Uralmash-4E, and later the Uralmash-15000 series drilling rig. Boreholes were drilled by branching from a central hole. The deepest, SG-3, reached 12,262 metres in 1989 and is the deepest artificial point on Earth. The borehole is 23 centimetres in diameter.
  In terms of true vertical depth, it is the deepest borehole in the world. For two decades it was also the world's longest borehole in terms of measured depth along the well bore, until it was surpassed in 2008 by the 12,289-metre-long Al Shaheen oil well in Qatar.
context_section_description: The Kola Superdeep Borehole (Russian: Кольская сверхглубокая скважина, romanized: Kol'skaya sverkhglubokaya skvazhina) is the result of a scientific drilling project of the Soviet Union in the Pechengsky District, on the Kola Peninsula. The project attempted to drill as deep as possible into the Earth's crust. With a depth of 12,262 metres (40,230 ft), it has been since 1989 the deepest artificial point on Earth. 
  Drilling began on 24 May 1970 using the Uralmash-4E, and later the Uralmash-15000 series drilling rig. Boreholes were drilled by branching from a central hole. The deepest, SG-3, reached 12,262 metres (40,230 ft; 7.619 mi) in 1989 and is the deepest artificial point on Earth. The borehole is 23 centimetres (9 in) in diameter.
  In terms of true vertical depth, it is the deepest borehole in the world. For two decades it was also the world's longest borehole in terms of measured depth along the well bore, until it was surpassed in 2008 by the 12,289-metre-long (40,318 ft) Al Shaheen oil well in Qatar.
caption: Superstructure of the Kola Superdeep Borehole, 2007
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