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Single Steel Drilling Caisson
Single steel drilling caisson is a drill barge that was built for year-round oil exploration in shallow ice-covered waters in the Beaufort Sea. The unit, initially named ''SSDC'' and later shortened to ''SDC'', was converted from an old oil tanker (''Ujigawa Maru'', later ''World Saga'') in the early 1980s. It has been used to drill a total of eight oil wells on both Canadian and U.S. continental shelves, the most recent in 2006. Description The hull of the single steel drilling caisson, which consists of the forward two thirds of the hull of a very large crude carrier, is long and wide, and measures from keel to main deck. The original 80,000-tonne drilling unit sits on top of a 35,000-tonne submersible barge that acts as an artificial steel berm when the unit is lowered to the seafloor using water ballast. While on location, a box-type skirt prevents it from sliding sideways and an air injection system helps to overcome the suction effect during de-ballasting. The unit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monrovia
Monrovia () is the capital city of the West African country of Liberia. Founded in 1822, it is located on Cape Mesurado on the Atlantic coast and as of the 2008 census had 1,010,970 residents, home to 29% of Liberia’s total population. As the nation's primate city, Monrovia is the country's economic, financial and cultural center; its economy is primarily centered on its harbor and its role as the seat of Liberian government. Etymology Monrovia is named in honor of U.S. President James Monroe, a prominent supporter of the colonization of Liberia and the American Colonization Society. Along with Washington, D.C., it is one of two world capitals to be named after a U.S. President. History Before 1816, the area around Cape Mesurado and the mouth of the Mesurado River was called Ducor. It had long been established as a crossroads and place of trade, and was inhabited by fishing, trading and farming communities of various ethnicities, including the Dey, Kru, Bassa, Go ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moon Pool
A moon pool is a feature of marine drilling platforms, drillships and diving support vessels, some marine research and underwater exploration or research vessels, and underwater habitats, in which it is also known as a wet porch. It is an opening in the floor or base of the hull, platform, or chamber giving access to the water below, allowing technicians or researchers to lower tools and instruments into the sea. It provides shelter and protection so that even if the ship is in high seas or surrounded by ice, researchers can work in comfort rather than on a deck exposed to the elements. A moon pool also allows divers, diving bells, ROVs, or small submersible craft to enter or leave the water easily and in a more protected environment. Moon pools can be used in chambers below sea level, especially for the use of scuba divers, and their design requires more complex consideration of air and water pressure acting on the moon pool surface. First use in oil drilling at sea Moon po ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Herschel Island
Herschel Island (french: Île d'Herschel; Inuit languages: ''Qikiqtaruk'') is an island in the Beaufort Sea (part of the Arctic Ocean), which lies off the coast of Yukon in Canada, of which it is administratively a part. It is Yukon's only offshore island. History Early history The earliest evidence of human occupation unearthed so far by archaeological investigations is that of the Thule culture, dating to approximately 1000 years ago. These people are the ancestors of the present-day Inuvialuit. The Inuvialuktun word for Herschel Island is "Qikiqtaruk", which simply means "island". The first European to sight the island was explorer Sir John Franklin, who named it on 15 July 1826.Burn, C. R. (2009) "After whom is Herschel Island named"? Arctic 62(3):317–323. It is not clear after whom the island was named. Franklin's journal records states that he wished to honour the name Herschel, of which three persons are notable for their scientific accomplishments: Sir William H ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tenneco
Tenneco (formerly Tenneco Automotive and originally Tennessee Gas Transmission Company) is an American automotive components original equipment manufacturer and an aftermarket ride control and emissions products manufacturer. It is a Fortune 500 company that has been publicly traded on the New York Stock Exchange since November 5, 1999 under the symbol TEN. Tenneco company headquarters are located in Lake Forest, Illinois, United States The company was acquired in November 2022 by Apollo Global Management. History Tenneco, Inc.'s origin was in the Chicago Corporation, established about 1930.TENNECO BUILDING Diana J. Kleiner, Handbook of Texas Online (retrieved 11 August 2010) Tennessee Gas and Transmission Company (completely separate) had been formed in 1940. Natural gas [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alaska
Alaska ( ; russian: Аляска, Alyaska; ale, Alax̂sxax̂; ; ems, Alas'kaaq; Yup'ik: ''Alaskaq''; tli, Anáaski) is a state located in the Western United States on the northwest extremity of North America. A semi-exclave of the U.S., it borders the Canadian province of British Columbia and the Yukon territory to the east; it also shares a maritime border with the Russian Federation's Chukotka Autonomous Okrug to the west, just across the Bering Strait. To the north are the Chukchi and Beaufort Seas of the Arctic Ocean, while the Pacific Ocean lies to the south and southwest. Alaska is by far the largest U.S. state by area, comprising more total area than the next three largest states ( Texas, California, and Montana) combined. It represents the seventh-largest subnational division in the world. It is the third-least populous and the most sparsely populated state, but by far the continent's most populous territory located mostly north of the 60th paralle ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harrison Bay (Beaufort Sea)
Harrison Bay is an estuary located north of Alaska that opens into the Beaufort Sea. It is adjacent to the Colville Delta. The powerful outflow of the Colville River creates a shallow region that is rich with nutrients, making it ecologically significant for wildlife. Geography Harrison Bay is bordered by Cape Halkett near Teshekpuk Lake on the western side and Oliktok Point on the eastern side. From Oliktok Point, a long chain of barrier islands head east and cross through Prudhoe Bay. Fauna The waters of Harrison Bay make an ideal refuge for long-tailed ducks, king eiders, red-throated loons, Arctic terns, surf scoters, brant geese, and glaucous gulls. In summer and fall, migrating red-throated and yellow-billed loons and king and spectacled eiders stop in to rest and feed. Nearshore forage fish are important in Arctic food webs, linking energy from smaller prey items to larger predators like birds and marine mammals. Harrison Bay is important habitat for forage fish, such as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gulf Canada
Gulf Canada was a Canadian integrated petroleum company that existed between 1944 and 2001. Gulf Oil Corporation began operating in Canada in 1942, and two years later formed a Canadian subsidiary called the Canadian Gulf Oil Company. In 1956 Canadian Gulf Oil merged with the British American Oil Company (of which Gulf Oil was the controlling shareholder) and until 1969 operated under the British American name. In 1969 British American amalgamated with its subsidiaries into a new company called Gulf Oil Canada Limited. During the 1970s and 1980s, Gulf Canada was one of the country's "big four" oil companies along with Imperial, Shell Canada, and Texaco Canada. Gulf Canada remained in existence after the 1985 acquisition of Gulf Oil by Chevron. However, in 1986 Gulf Canada sold its retail operations, which included 900 gas stations, to Petro-Canada. In 2001, Conoco purchased Gulf Canada for C$6.7 billion in what was then the largest oil and gas transaction in Canadian history. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caisson (engineering)
In geotechnical engineering, a caisson ( or ; borrowed from French ''caisson'', from Italian ''cassone'', meaning ''large box'', an augmentative of ''cassa'') is a watertight retaining structure used, for example, to work on the foundations of a bridge pier, for the construction of a concrete dam, or for the repair of ships. Caissons are constructed in such a way that the water can be pumped out, keeping the work environment dry. When piers are being built using an open caisson, and it is not practical to reach suitable soil, friction pilings may be driven to form a suitable sub-foundation. These piles are connected by a foundation pad upon which the column pier is erected. Caisson engineering has been used at least since the 18th century, and was notably used in the construction of the Brooklyn Bridge, which was completed in 1883. Types To install a caisson in place, it is brought down through soft mud until a suitable foundation material is encountered. While bedrock is pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Artificial Island
An artificial island is an island that has been constructed by people rather than formed by natural means. Artificial islands may vary in size from small islets reclaimed solely to support a single pillar of a building or structure to those that support entire communities and cities. Early artificial islands included floating structures in still waters or wooden or megalithic structures erected in shallow waters (e.g. crannógs and Nan Madol discussed below). In modern times artificial islands are usually formed by land reclamation, but some are formed by the incidental isolation of an existing piece of land during canal construction (e.g. Donauinsel, Ko Kret, and much of Door County, Wisconsin), or flooding of valleys resulting in the tops of former knolls getting isolated by water (e.g., Barro Colorado Island). One of the world's largest artificial islands, René-Levasseur Island, was formed by the flooding of two adjacent reservoirs. History Despite a popular image o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dynamic Positioning
Dynamic positioning (DP) is a computer-controlled system to automatically maintain a vessel's position and heading by using its own propellers and thrusters. Position reference sensors, combined with wind sensors, motion sensors and gyrocompasses, provide information to the computer pertaining to the vessel's position and the magnitude and direction of environmental forces affecting its position. Examples of vessel types that employ DP include ships and semi-submersible mobile offshore drilling units (MODU), oceanographic research vessels, cable layer ships and cruise ships. The computer program contains a mathematical model of the vessel that includes information pertaining to the wind and current drag of the vessel and the location of the thrusters. This knowledge, combined with the sensor information, allows the computer to calculate the required steering angle and thruster output for each thruster. This allows operations at sea where mooring or anchoring is not feasible ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dome Petroleum
Dome Petroleum Limited was a Calgary-based oil and gas company. Founded in 1950 as a subsidiary of the Toronto company Dome Mines Limited, Dome was built by Jack Gallagher, who remained with the company until 1983. In 1988 Dome was purchased by Amoco. History Jack Gallagher joined a group of investors in Dome Exploration (Western) Ltd. in 1950 and built it into the major Canadian oil company Dome Petroleum Limited (to which it was renamed in 1958). Gallagher was the sole employee for the first two years. However, James McCrea, who was instrumental in building Dome Mines into one of the giants of the Canadian mining industry, is credited with originally creating Dome Exploration (Western) Ltd. Charles Dunkley was Dome's third employee and became Dome's Senior Vice President and Jack's management partner. "Charlie" had a reserved management style and the pair worked well together especially in the early days when they ran a tight management ship. Dome grew by making acquisitions i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
BW Group
BW Group is a maritime company involved in shipping, floating gas infrastructure and deep-water oil & gas production. The company has over 350 vessels managed by an international team of over 7000 staff worldwide. The group was founded by Sir Yue-Kong Pao in Hong Kong in 1955 as World-Wide Shipping. In 2003, the company acquired Bergesen d.y. ASA, Norway's largest shipping company, which was founded in 1935 by Sigval Bergesen the Younger. In 2005, the business was re-branded as BW. With its LNG and LPG fleets combined, BW Group owns and operates the world's largest gas shipping fleet of more than 115 gas vessels, including four FSRUs (floating storage and regasification units). Hafnia, a member of the BW Group, operates the world's largest fleet of oil product tankers, and BW Offshore comprises the second largest number of floating oil and gas production units (FPSOs). BW's controlled fleet of over 350 ships also includes crude oil supertankers and dry bulk carriers. BW Grou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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