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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 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 ...
As the race in space was winding down, soviet scientists turned inwards. You'd never guess that this is the site of one of their great achievements. This hard-to-find rusty cap in the ruins of a ...
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 ...
Scientists using an ocean drilling vessel have dug the deepest hole ever in rock from Earth's mantle - penetrating 4,160 feet (1,268 meters) below the Atlantic seabed - and obtained a large sample ...
the deepest boreholes (Core drill, for geological exploration), and; the longest boreholes (Extended Reach Drilling, for oil production).
Especially in developing countries many boreholes are stull dug by hand. The digging begins with manual labor using basic tools such as shovels, picks, and crowbars. Workers excavate the soil layer by layer, often using a circular motion to create a well-shaped hole. The process is slow and demanding, requiring teamwork and coordination.