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A jackup rig or a self-elevating unit is a type of mobile platform that consists of a buoyant hull fitted with a number of movable legs, capable of raising its hull over the surface of the sea. The buoyant hull enables transportation of the unit and all attached machinery to a desired location.
Seadrill is an offshore drilling contractor providing worldwide offshore drilling services to the oil and gas industry.Its primary business is the ownership and operation of drillships, semi-submersible rigs, and jack-up rigs for operations in shallow to ultra-deep water in both benign and harsh environments.
R. G. LeTourneau founded R.G. LeTourneau, Inc. in California in 1929, as a contractor of earthmoving equipment, which manufactured products in Longview, Texas. [1] [better source needed] During World War II, the company provided nearly 75% of the Allies' earthmoving equipment. [2] In 1954, it built the first jack-up drilling rig.
Pages in category "Jack-up rigs" The following 10 pages are in this category, out of 10 total. This list may not reflect recent changes. ...
When offshore drilling moved into deeper waters of up to 30 metres (98 ft), fixed platform rigs were built, until demands for drilling equipment was needed in the 100 feet (30 m) to 120 metres (390 ft) depth of the Gulf of Mexico, the first jack-up rigs began appearing from specialized offshore drilling contractors. [11]
Jackup rigs in Longkou, China. Jack-up Mobile Drilling Units (or jack-ups), as the name suggests, are rigs that can be jacked up above the sea using legs that can be lowered, much like jacks. These MODUs (Mobile Offshore Drilling Units) are typically used in water depths up to 120 metres (390 ft), although some designs can go to 170 m (560 ft ...
The rig was valued by the leasing contract at US$4.75 million. This transaction was later challenged by the United States tax authorities as a sale agreement. [6] In 1965, the barge was sold pursuant to contractual option to Reading & Bates. [5] Mr. Louie first drilled at the Gulf of Mexico, where it drilled more than 40 wells.
Because the pads of the liftboat are sitting on a muddy, unstable seafloor, most liftboats practice a safety measure called a preload, where the boat jacks-up the absolute minimum to clear hull from the tips of the significant wave heights, [3] fills its holds with water for weight and allows the boat to settle in the mud for several hours ...
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