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  2. Kola Superdeep Borehole - Wikipedia

    en.wikipedia.org/wiki/Kola_Superdeep_Borehole

    The Kola Superdeep Borehole SG-3 (Russian: Кольская сверхглубокая скважина СГ-3, romanized: Kol'skaya sverkhglubokaya skvazhina SG-3) is the deepest human-made hole on Earth (since 1979), which attained maximum true vertical depth of 12,262 metres (40,230 ft; 7.619 mi) in 1989. [1]

  3. Well to Hell - Wikipedia

    en.wikipedia.org/wiki/Well_to_hell

    The Soviet Union had, in fact, drilled a hole more than 12 km (7.5 miles) deep, the Kola Superdeep Borehole, located not in Siberia but on the Kola Peninsula, which shares borders with Norway and Finland. Upon reaching the depth of 12,262 m (40,230 feet) in 1989, geological anomalies were found, although they reported no supernatural encounters ...

  4. Travel to the Earth's center - Wikipedia

    en.wikipedia.org/wiki/Travel_to_the_Earth's_center

    In terms of depth below the surface, the Kola Superdeep Borehole SG-3 retains the world record at 12,262 metres (40,230 ft) in 1989 and still is the deepest artificial point on Earth. [ 4 ] Hollow Earth

  5. Extremes on Earth - Wikipedia

    en.wikipedia.org/wiki/Extremes_on_Earth

    Kola Superdeep Borehole, Russia [96] Deepest borehole by depth below sea level: 11,944 m (39,186 ft) (10,685 m well at 1,259 m deep seabed)

  6. June 1979 - Wikipedia

    en.wikipedia.org/wiki/June_1979

    The Kola Superdeep Borehole broke the world record for greatest depth drilled into the Earth, reaching 31,441 feet (9,583 m) to break the mark set in the U.S. in 1974 by the "Bertha Rogers hole" in Washita County, Oklahoma. Drilling would cease in 1989 at a depth of 40,230 feet (12,260 m) which has not been exceeded since. [38]

  7. Scientific drilling - Wikipedia

    en.wikipedia.org/wiki/Scientific_drilling

    The Kola Superdeep Borehole on the Kola peninsula of Russia reached 12,262 metres (40,230 ft) and is the deepest penetration of the Earth's solid surface. The German Continental Deep Drilling Program at 9.1 kilometres (5.7 mi) has shown the earth crust to be mostly porous.

  8. How Drilling the World’s Deepest Holes Could Give Us ...

    www.aol.com/lifestyle/drilling-world-deepest...

    The plan is to usher in a hybrid design, first using conventional rotary drilling technology developed by the oil and gas industries to cut through Earth’s surface layers.

  9. Category:Deepest boreholes - Wikipedia

    en.wikipedia.org/wiki/Category:Deepest_boreholes

    Kola Superdeep Borehole; P. Project Mohole; S. Sakhalin-I; San Andreas Fault Observatory at Depth This page was last edited on 4 June 2015, at 15:45 (UTC). ...