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Pagosa hot springs are the world's deepest geothermal hot spring. [13] [14] In 2020 the depth was measured by a collaborative team from the Center for Mineral Resources Science (CMRS) and the Colorado School of Mines and the U.S. Geological Survey. The measuring device went to a depth of 1002 feet, but the "tape measure" had reached its full ...
[1] [28] It was also the longest borehole in the world from 1979 to 2008. Its record length was surpassed in May 2008 by the curved extended reach drilling bore of well BD-04A in the Al Shaheen Oil Field in Qatar, which attained a total length of 12,289 metres (40,318 ft) but depth of just 1,387 metres (4,551 ft). [29] [30]
The Iceland Deep Drilling Project (IDDP) is a geothermal project established in 2000 by a consortium of the National Energy Authority of Iceland (Orkustofnun/OS) and four of Iceland's leading energy companies: Hitaveita Suðurnesja (HS), Landsvirkjun, Orkuveita Reykjavíkur and Mannvit Engineering. The consortium is referred to as "Deep Vision".
With geothermal energy sources plateauing across the world because conventional drilling methods proved impractical to handle the hotter and harder crusts much deeper than the shallow depths of ...
Upper estimates of geothermal resources assume wells as deep as 10 km (6.2 mi). Drilling near this depth is now possible in the petroleum industry, although it is an expensive process. The deepest research well in the world, the Kola Superdeep Borehole (KSDB-3), is 12.261 km (7.619 mi) deep. [21]
This list of deepest mines includes operational and non-operational mines that are at least 2,212 m (7,257 ft), which is the depth of Veryovkina Cave, the deepest known natural cave in the world. The depth measurements in this list represent the difference in elevation from the entrance of the mine to the deepest excavated point.
The Xiaozhai Tiankeng has been well known to local people since ancient times. Xiaozhai is the name of an abandoned village nearby and literally means "little village", and "Tiankeng" means Heavenly Pit, a unique regional name for sinkholes in China. A 2,800-step staircase has been constructed in order to facilitate tourism. [2]
The Lone Star Bertha Rogers well in Beckham County, Oklahoma held the record as the world's deepest producing well in 1974-1979. It has subsequently been surpassed by several other deep wells, see deepest artificial point. It was drilled to a depth of 31,441 feet (9,583 m). [1]