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  2. Borehole - Wikipedia

    en.wikipedia.org/wiki/Borehole

    Borehole drilling has a long history. By at least the Han dynasty (202 BC – 220 AD), the Chinese used deep borehole drilling for mining and other projects. The British sinologist and historian Michael Loewe states that borehole sites could reach as deep as 600 metres (2,000 ft). [3]

  3. 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]

  4. Boring (earth) - Wikipedia

    en.wikipedia.org/wiki/Boring_(earth)

    Borehole drilling has a long history. Han dynasty China (202 BC – 220 AD) used deep borehole drilling for mining and other projects. Chinese borehole sites could reach as deep as 600 m (2,000 ft). [1]

  5. Measured depth - Wikipedia

    en.wikipedia.org/wiki/Measured_depth

    For comparison, the Kola Superdeep Borehole has a slightly shorter measured depth at 12,262 m, but since this is a vertical borehole, this is also equal to the true vertical depth, making the Kola Superdeep Borehole deeper by a factor of 6.9.

  6. Category:Deepest boreholes - Wikipedia

    en.wikipedia.org/wiki/Category:Deepest_boreholes

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  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. Oil well - Wikipedia

    en.wikipedia.org/wiki/Oil_well

    A well that is designed to produce only gas may be termed a gas well. Wells are created by drilling down into an oil or gas reserve and if necessary equipped with extraction devices such as pumpjacks .

  9. Bertha Rogers Borehole - Wikipedia

    en.wikipedia.org/wiki/Bertha_Rogers_Borehole

    The Bertha Rogers Borehole is a former natural gas well in Burns Flat, Dill City, Oklahoma, US.Today plugged and abandoned, it was originally drilled by the Lone Star Producing Company as its oil-exploratory hole number 1–27 between October 25, 1972 and April 13, 1974, reaching a then world record terminal depth of 31,441 feet (5.9547 mi; 9,583 m).