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Smithsonian says "Not surprisingly—because the crust is thinner—some deep holes have been bored through the ocean floor. The specialized Japanese drillship Chik
by hobs 7y ago
Smithsonian says "Not surprisingly—because the crust is thinner—some deep holes have been bored through the ocean floor. The specialized Japanese drillship Chikyu claims the record for the deepest offshore hole drilled for scientific purposes—about 10,000 feet (almost 2 miles) below the sea floor, according to James F. Allan, program director for the Ocean Drilling Program at the National Science Foundation.
The oil and gas industry also claims some deep holes, on land and offshore. BP’s Deepwater Horizon holds the offshore record. The drilling rig—lost in an explosion in 2010— managed to get some 30,000 feet below the sea, or about 5 miles."
https://www.smithsonianmag.com/smithsonian-institution/ask-smithsonian-whats-deepest-hole-ever-dug-180954349/ https://www.smithsonianmag.com/smithsonian-institution/ask-s...
- wavefunction 7y agoI suppose then it depends on how deep the ocean floor bed was below the ocean's surface where the Chikyu drilled that hole. If Nature is correct then it must have been in a spot of at least 20,000 ft of ocean depth (30,000deepwater - ~10,000chikyuBelowTheSeaFloor).
- thaumasiotes 7y agoI think you're being overly generous to Nature. By my read, they just misinterpreted "deepest hole drilled offshore for scientific purposes" as "deepest hole drilled offshore for any purpose". The water depth was already cited in the top-level comment: > deepwater horizon drilled to 10,683 m in 1,259 m of water