Subsea

Jacky has been developed with a single production well, tied in through a normally unmanned wellhead platform, constructed by HSM Steel Structures BV, then via a subsea pipeline, installed by Subsea 7

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Subsea systems typically have subsea optical amplifiers and submarine line terminal equipment (SLTE) located in terrestrial landing stations and connected to the either end of the amplifier chain.

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"Subsea permafrost is losing its ability to be an impermeable cap," Natalia Shakhova, a scientist at the University of Fairbanks, Alaska, said in a statement.

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Subsea containment procedures must also be developed in the event that well control is lost.

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“Subsea” means the wellhead rests on the seafloor, as opposed to a “dry” or conventional wellhead on a platform, commonly used on virtually all shallow water wells.

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Divers from Smit Pentow Subsea the diving division of the local salvors, Smit Pentow Marine, were dispatched to get a closer look at the ship.

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Subsea permafrost distribution on the Alaskan Shelf.

Permafrost in the Arctic 2009

Subsea relict permafrost is thought to contain or overlie large volumes of CH4 in the form of gas hydrates at depths of up to several hundred meters.

Permafrost in the Arctic 2009

Subsea 7 Engineering, PA/Associated Press The flight took off from the Rio airport at 7: 30 p.m. local time Sunday and made its last radio contact nearly four hours later, flying at 35,000 feet, Brazilian and Air France officials said.

Aircraft Debris Found in Atlantic 2009

Subsea permafrost has formed either in response to negative mean annual sea-bottom temperatures or as the result of inundation of terrestrial permafrost.

Permafrost in the Arctic 2009