Noble Corporation plc is an offshore drilling contractor organized in London , England. Its affiliate, Noble Corporation, is organized in the Cayman Islands . It is the corporate successor of Noble Drilling Corporation .
18-413: The company operates 24 drilling rigs including eight drillships , four semi-submersible platforms , and 12 jackup rigs . In 2020, 26.6% of revenues were from ExxonMobil , 21.7% of revenues were from Shell , 14.3% of revenues were from Equinor , and 13.8% of revenues were from Saudi Aramco . In 1985, Noble Affiliates, Inc., completed the corporate spin-off of Noble Drilling Corporation. In 2002,
36-550: A $ 2.16 billion cash transaction. In 2014, the company distributed its interests in Paragon Offshore plc to its shareholders. In July 2020, the company filed for bankruptcy ; it emerged from bankruptcy in February 2021. In April 2021, the company acquired Pacific Drilling. In November 2021, it was announced that Maersk Drilling would merge with Noble Corporation and the combined company would be called Noble Corporation, with
54-587: A drillship does to drill, is that a marine riser is lowered from the drillship to the seabed with a blowout preventer (BOP) at the bottom that connects to the wellhead. The BOP is used to quickly disconnect the riser from the wellhead in times of emergency or in any needed situation. Underneath the derrick is a moonpool, an opening through the hull covered by the rig floor. Some of the modern drillships have larger derricks that allow dual activity operations, for example, simultaneous drilling and casing handling. There are different types of offshore drilling units such as
72-412: A first-ever anchor mooring array based on a unique turret system. The vessel was named Discoverer I . The Discoverer I had no main propulsion engines, meaning it needed to be towed out to the drill site. A drillship can be used as a platform to carry out well maintenance or completion work such as casing and tubing installation, subsea tree installations, and well capping. Drillships are often built to
90-459: A valuation of £2.6 billion. The merger was completed on October 3, 2022. In June 2024, the company announced it would acquire Diamond Offshore Drilling for $ 1.6 billion in a cash-and-stock deal. In 2012, the Noble Discoverer drillship, operating under contract for Shell lost its mooring and drifted close to shore. There were no injuries or environmental damage reported as a result of
108-498: Is typically transported to a location where it is placed in service Oil platform , a large structure with facilities for well drilling to explore, extract, store, and process petroleum and natural gas, in deeper water (more than 1,500 metres (4,900 ft)), the semisubmersibles or drillships are maintained at the required drilling location using dynamic positioning. See also [ edit ] Submarine boat Submersible boat [REDACTED] Index of articles associated with
126-575: The Transocean drillship Dhirubhai Deepwater KG1 set the world water-depth record at 10,194 feet of water (3,107 meters) while working for Reliance – LWD and directional drilling done by Sperry Drilling in India. Semi-submersibles (Redirected from Semi-submersibles ) [REDACTED] Look up semi-submersible or semisubmersible in Wiktionary,
144-603: The oil platform , jackup rig , submersible drilling rig , semi-submersible platform and of course drillships. All drillships have what is called a ”moon pool”. The moon pool is an opening on the base of the hull and depending on the mission the vessel is on, drilling equipment, small submersible crafts and divers may pass through the moon pool. Since the drillship is also a vessel, it can easily relocate to any desired location. Due to their mobility, drillships are not as stable compared to semi-submersible platforms. To maintain its position, drillships may utilize their anchors or use
162-618: The Gulf of Mexico to offshore Angola, whereas a semi-submersible drilling unit must be towed and takes 70 days. Drillship construction costs are much higher than that of a semi-submersible. Although mobility comes at a high price, the drillship owners can charge higher day rates and get the benefit of lower idle times between assignments. The table below depicts the industry's way of classifying drill sites into different vintages, depending on their age and water depth. The drilling operations are very detailed and in-depth. A simple way to understand what
180-506: The accident. In 2017, an employee went missing on the Noble Lloyd Noble drilling rig. Drillship A drillship is a merchant vessel designed for use in exploratory offshore drilling of new oil and gas wells or for scientific drilling purposes. In recent years the vessels have been used in deepwater and ultra-deepwater applications, equipped with the latest and most advanced dynamic positioning systems. The first drillship
198-532: The company underwent a restructuring whereby it moved its domicile to the Cayman Islands and established Noble Corporation as the parent holding company. In early 2009, the company moved its domicile from the Cayman Islands to Switzerland due to the potential for more U.S. taxes on Caribbean tax havens . In 2013, the company moved to the United Kingdom . In 2010, the company acquired Frontier Drilling in
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#1733085947318216-863: The design specifications set by the oil production company or investors. From the first drillship CUSS I to the Deepwater Asgard , the fleet size has been growing ever since. In 2013 the worldwide fleet of drillships topped 80 ships, more than double its size in 2009. Drillships are not only growing in size but also in capability, with new technology assisting operations from academic research to ice-breaker class drilling vessels. U.S. President Barack Obama 's decision in late March 2010 to expand U.S. domestic exploratory drilling seemed likely to increase further developments of drillship technology. Drillships are just one way to perform various types of drilling. This function can also be performed by semi-submersibles , jackups, barges , or platform rigs. Drillships have
234-455: The free dictionary. Semi-submersible may refer to a self-propelled vessel, such as: Heavy-lift ship , which partially submerge to allow their cargo (another ship) to float into place for transport Narco-submarine , some of which remained partially on the surface Semi-submarine , which cannot fully submerge Semi-submersible naval vessel , which partially submerges to minimize being observed Semi-submersible platform , which
252-457: The functional ability of semi-submersible drilling rigs and also have a few unique features that separate them from all others, first being the ship-shaped design. A drillship has greater mobility and can move quickly under its own propulsion from drill site to drill site in contrast to semi-submersibles and jackup barges and platforms. Drillships have the ability to save time sailing between oilfields worldwide. A drillship takes 20 days to move from
270-541: The same name This set index article includes a list of related items that share the same name (or similar names). If an internal link incorrectly led you here, you may wish to change the link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=Semi-submersible&oldid=1139173754 " Categories : Set index articles Boat types Nautical terminology Submarines by type Hidden categories: Articles with short description Short description
288-404: The ship's computer-controlled system on board to run off its dynamic positioning . One of the world's best-known drillships is Japan's ocean-going drilling vessel Chikyū , which actually is a research vessel. The Chikyū has the remarkable ability to drill to a depth of 7.0 kilometres (23,000 ft) below the seabed, bringing that to two to four times that of any other drillship. In 2011
306-515: Was named CUSS ( Glomar ) II , a 5,500-deadweight-ton vessel, costing around $ 4.5 million. Built by a Gulf Coast shipyard, the vessel was almost twice the size of the CUSS I , and became the world's first drillship built as a new construction which set sail in 1962. In 1962, The Offshore Company elected to build a new type of drillship, larger than that of the Glomar class. This new drillship would feature
324-445: Was the CUSS I , designed by Robert F. Bauer of Global Marine in 1955. The CUSS I had drilled in 400-foot-deep waters by 1957. Robert F. Bauer became the first president of Global Marine in 1958. In 1961 Global Marine started a new drillship era. They ordered several self-propelled drillships each with a rated centerline drilling of 20,000 foot-wells in water depths of 600 feet. The first
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