What is the largest oil rig in the world? Some oil rigs are huge in terms of the materials they use, while others are massive in their sheer reach. Dong Nhat Huy/Shutterstock
To extract oil and gas beneath the ocean’s surface, offshore drilling involves enormous structures.
People often search online for the biggest oil rigs in the worldto refer to massive offshore platforms that are used for global oil production. The modern offshore oil and natural gas installations are true engineering wonders. The enormous structures are a combination of drilling equipment, processing facilities, storage units and housing for many workers.
They operate in harsh ocean conditions. Here are the biggest and most impressive drilling and oil platforms ever constructed.
1. Hibernia Platform (19659003) The Hibernia Platform, which is located in the North Atlantic about 315 kilometers (315 miles) east of Newfoundland, is among the largest offshore oil platforms built.
When completed, the platform’s on-bottom mass will be more than 661 000 tons (660,000 metric tons) and its gross weight (including the solid ballasts and fluids stored in the structure) is over 1.1 millions tons (1,000,000 metric tons). Engineers have designed the platform so that it can withstand an impact of a million-ton (600,000 metric tonnes) iceberg and may be damaged by icebergs as large as 6 million ton. The facility can operate safely in harsh offshore conditions.
Hibernia is one of Canada’s most important oil platforms.
2. Berkut Oil Platform (19659007) The Berkut oil platform is the largest of its type in the world. Its weight, both top and bottom, exceeds 200,000 metric tons. Berkut is located off the Russian Pacific Coast near Sakhalin Island. It supports offshore oil-and-gas operations under harsh subarctic weather conditions.
This structure, which weighs around 200,000 tons, was constructed as part of an international $12 billion collaboration between ExxonMobil and Rosneft with partners from Japan, India, and other countries. The gravity-based construction required approximately 52,000 cubic meters concrete and 27,000 tonnes of steel.
The Berkut oil platform is designed to handle temperatures down to -47°F (-44°C) and high waves of up to 59′ (18m) in height. It allows for horizontal drilling at a distance not less than 7 km (4 miles) away from the platform.
With the platform’s bottom, it measures 472 feet high, 345 feet long (105 meters), 197 feet wide (60 meters), and 195 feet tall (60 meters).
3.
Troll A Platform (19659012) The Troll A Platform in the North Sea, off the coasts of Norway, is the tallest structure ever to be moved by human beings. The platform is more than 1,210 feet (369) below the sea level.
This structure is made of high-strength concrete, reinforced by steel rods. It also uses prestressed tendon to help support the natural gas produced from Troll’s gas field. Troll A, because of its size and complexity of engineering, is described by many as the most impressive offshore platform.
4.
Perdido Oil Platform (19659015) The Perdido platform is located in the Gulf of Mexico and it’s the deepest offshore spar platform. Shell operates the floating facility in water that is about 2,450 meters deep.
This platform is connected to wells that produce oil and natural gas between 7,500 feet and 9,800 foot (2,300 meters and 3,000 metres) beneath the surface of water. Perdido is now one of the world’s most advanced offshore drilling operations.
5.
Petronius Platform (also located in Gulf of Mexico) The Petronius Platform is also one of the tallest structures freestanding in the entire world. Platform rises about 2,001 feet above the ocean’s floor. Petronius, unlike rigid offshore structures was designed to move slightly in response to ocean currents and tidal forces. The flexible approach to engineering helps the structure withstand storms and waves that are common offshore.
6. Olympus Oil Platform (Olympus Oil Platform)
Olympus Oil Platform, also known as Mars B, is located in the Mars Field in the Gulf of Mexico. At peak production, the facility can produce around 100,000 barrels equivalent of oil per day.
The Mars oil field produced 700,000,000 barrels by 2014. This platform has multi-deck topside installations, drilling operations, and living quarters that support nearly 200 offshore workers.
7. Stones FPSO (19659021) The Stones offshore oil and natural gas production project is located approximately 200 feet away (322 kilometers) from the coast of New Orleans. It’s the deepest oil and natural gas development in the world.
The floating storage and offloading system
operates at water depths of up to 9,500 feet (2.896 meters). Stones is a floating production system that can process crude oil directly on the seabed and then store it before transporting it to land.
Offshore Oil Rigs: How They Work
Offshore Oil Rigs are small, industrial towns built on the sea. Platforms typically include drilling equipment, storage units, processing systems and rooms to monitor production. Workers sleep on platforms and are transported by helicopters or supply vessels. Offshore oil production is far away from the land, so safety systems, support vessels, and emergency equipment are vital. They are used on the continental shelves and deep sea waters for the extraction of petroleum and gas from the ocean floor. With the advancement of technology, drilling operations can be conducted more efficiently through subsea installation that directly connects wells to platforms.
The environmental impact of offshore drilling
There are also challenges associated with the production of oil and natural gas off-shore.
The biggest risk is oil spills.
The produced water from offshore drilling may contain hydrocarbons dissolved in it and be highly salinized. This water must be treated or reinjected to reduce environmental impact.
Offshore facilities of today are built to be able to handle hurricanes and extreme weather conditions, as well as corrosive sea conditions, while still maintaining safety. Also, engineers continue to explore ways to improve offshore oil production efficiency and reduce emissions. This article was created using AI, and then fact-checked by HowStuffWorks editors.