"Perdido" (Spanish for lost) is the deepest floating oil platform in the world at a water depth of about 2450 meters (8040 feet) operated by the Shell Oil Company in the Gulf of Mexico USA. At 267 meters, it is almost as tall as the Eiffel Tower. The platform is located in the Perdido fold belt which is a rich discovery of crude oil and natural gas. The Perdido spar began production in 2010 and its peak production is 100,000 barrels of oil equivalent (ca. 16,000 m3/d) and 200 million cubic feet of gas per day (ca. 5.7*106 m3/d).

Perdido extracts oil from 35 subsea wells, of which 22 lie beneath the spar, while 13 wells are located eight miles west of the platform. These are connected via a 44 kilometre (27 mile) network of pipelines on the ocean floor the manifold below the platform, where the oil is pumped upwards in five flexible pipes called risers. This complicated subsea installation is needed, as the reservoir pressure is rather low which means the transport from the seafloor to the ocean surface needs pumps, the number of which had to be minimized.

A workforce of 172 people keep it up and running. They work in 12-hour shifts for 2 weeks followed by 2 weeks off, back on land.

More Info: en.wikipedia.org