A jackup rig is a barge fitted with long support legs that can be raised or lowered. The jackup is maneuvered (self-propelled or by towing) into location with its legs up and the hull floating on the water. Upon arrival at the work location, the legs are jacked down onto the seafloor. Then "preloading" takes place, where the weight of the barge and additional ballast water are used to dr. OverviewA jackup rig or a self-elevating unit is a type of mobile platform that consists of a buoyant fitted with a number of movable legs, capable of raising its hull over the surface of the sea. The buoyant hull enables tra. .
Jackup rigs are so named because they are self-elevating with three, four, six and even eight movable legs that can be extended (“jacked”) above or below the hull. Jackups are towed or moved under self propulsion to the site.
[pdf] The rig was built as a at a French shipyard, and delivered to Stavanger Drilling in July 1976. The rig was named after the Norwegian writer . It could be used for drilling purposes o. .
Early in the evening of 27 March 1980, more than 200 men were off duty in the accommodation on Alexander L. Kielland. Conditions were rainy with dense fog, with the wind gusting to 40 knots (74 km/h) and waves up t. .
In March 1981, an investigative report concluded that Kielland collapsed due to a in one of its six bracings (bracing D-6), which connected the collapsed D-leg to the rest of the rig. This was traced. .
Kielland was recovered in 1983 at the third attempt. The rig was scuttled later that year in the Fjord after a search for missing bodies had been completed, as well as several tests to determine the cause of the disas.
[pdf] The rig was built as a at a French shipyard, and delivered to Stavanger Drilling in July 1976. The rig was named after the Norwegian writer . It could be used for drilling purposes o. .
Early in the evening of 27 March 1980, more than 200 men were off duty in the accommodation on Alexander L. Kielland. Conditions were rainy with dense fog, with the wind gusting to 40 knots (74 km/h) and waves up t. .
In March 1981, an investigative report concluded that Kielland collapsed due to a in one of its six bracings (bracing D-6), which connected the collapsed D-leg to the rest of the rig. This was traced. .
Kielland was recovered in 1983 at the third attempt. The rig was scuttled later that year in the Fjord after a search for missing bodies had been completed, as well as several tests to determine the cause of the disas.
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