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For many years, the world's longest borehole was the Kola Superdeep Borehole in Russia. From 2011 until August 2012 the record was held by the 12,345-metre (40,502 ft) long Sakhalin-I Odoptu OP-11 Well, offshore the Russian island Sakhalin. [11] The Chayvo Z-44 extended-reach well took the title of the world's longest borehole on 27 August 2012 ...
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]
A borehole is a narrow shaft bored in the ground, either vertically or horizontally. ... Deep borehole disposal; E. Erygmascope; G. Geosteering; H. Horizontal ...
Ark: Survival Evolved (stylized as ARK) is a 2017 action-adventure survival video game developed by Studio Wildcard. In the game, players must survive being stranded on one of several maps filled with roaming dinosaurs , fictional fantasy monsters, and other prehistoric animals, natural hazards, and potentially hostile human players.
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]
One of the most promising approaches in deep drilling field is utilization of electrical plasma. It has lower energy efficiency than some other technologies, but it has several other advantages. Producing boreholes with wide range of diameters or drilling in water environment can be mentioned.
In the oil industry measured depth (commonly referred to as MD, or just the depth) is the length of the drilled borehole. [1] In conventional vertical wells, this coincides with the true vertical depth , but in directional or horizontal wells, especially those using extended reach drilling , the two can deviate greatly.