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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]
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).
the deepest boreholes (Core drill, for geological exploration), and; the longest boreholes (Extended Reach Drilling, for oil production).
This hard-to-find rusty cap in the ruins of a building in Russia's Kola Peninsula covers the deepest hole on earth. The scientists drilled it off and on for 24 years from 1970 to 1994. They got ...
Dean's Blue Hole, an underwater cavern, in the Bahamas may be popular with tourists and freedivers, but, according to a 60 Minutes report, many locals believe it was "dug by the devil.". Such ...
The Woodingdean Water Well is the deepest hand-dug well in the world, at 390 metres (1,280 ft) deep. It was dug to provide water for a workhouse. [1] [2] Work on the well started in 1858, and was finished four years later, on 16 March 1862. It is located just outside the Nuffield Hospital in Woodingdean, in Brighton and Hove, England, United ...
The deepest hole ever drilled on Earth is the Kola superdeep borehole in northwest Russia, which extends down about 12 km. That may be deep enough to touch the Red Planet water, but nobody ...
Although it is billed as the world's largest hand-dug well, at 109 feet (33 m) deep and 32 feet (9.8 m) in diameter, [6] the Well of Joseph in the Cairo Citadel at 280 feet (85 m) deep and the Pozzo di San Patrizio (St. Patrick's Well) built in 1527 in Orvieto, Italy, at 61 metres (200 ft) deep by 13 metres (43 ft) wide [7] are both actually ...