How do tension leg platforms work?
A Tension Leg Platform (TLP) is a vertically moored compliant platform. The floating platform with its excess buoyancy is vertically moored by taut mooring lines called tendons (or tethers). The structure is vertically restrained precluding motions vertically (heave) and rotationally (pitch and roll).
How are the legs of tender platforms fixed at the seabed?
Divers secure the platform to the seabed anchor through the use of tubular-steel tethers. The upward pull of the platform, as it tries to float, stretches the tethers, placing them in tension. The taut tethers now serve as legs to locate the platform and maintain its position.
What is TLP oil and gas?
A tension-leg platform (TLP) or extended tension leg platform (ETLP) is a vertically moored floating structure normally used for the offshore production of oil or gas, and is particularly suited for water depths greater than 300 metres (about 1000 ft) and less than 1500 metres (about 4900 ft).
How does a spar platform work?
A spar platform consists of a large-diameter single vertical cylinder supporting a deck, which forms the topside on the surface of the deck with drilling and production equipment. The cylinder does not extend all the way to the seafloor, but instead is tethered to the bottom by a series of cables and lines.
Which of the following is the largest offshore platform in use?
The Berkut Platform in the Sea of Okhotsk on the Russian Pacific Coast. Developed by Russian oil giant Rosneft, ExxonMobil, and other partners, the Berkut platform is the largest in the world, weighing a gargantuan 200,000 tons.
What is the difference between a platform and a rig?
The short explanation is that an oil platform is a permanent structure that is fixed to the floor of the ocean and an oil rig is a movable platform that is moved from place to place by a barge and then secured to a temporary location.
Are oil platforms anchored?
They are generally anchored by combinations of chain, wire rope or polyester rope, or both, during drilling and/or production operations, though they can also be kept in place by the use of dynamic positioning. Semi-submersibles can be used in water depths from 60 to 6,000 metres (200 to 20,000 ft).
What is topsides in oil and gas?
On an offshore oil platform, topsides refers to the upper half of the structure, above the sea level, outside the splash zone, on which equipment is installed. This includes the oil production plant, the accommodation block and the drilling rig.
What is a fixed offshore platform?
A fixed platform is a type of offshore platform used for the extraction of petroleum or gas. These platforms are built on concrete and/or steel legs anchored directly onto the seabed, supporting a deck with space for drilling rigs, production facilities and crew quarters.
Do spar platforms float?
A floating platform alternative that can support drilling, production and storage operations, the spar consists of a large vertical cylinder bearing topsides with equipment.
Where is the Perdido oil platform located?
Gulf of Mexico
The Perdido Regional Host development lies in the Gulf of Mexico, approximately 200 miles south of Freeport (Texas). It will be developed by a spar moored in 7,817ft (2,383m) of water, making it the deepest spar production facility in the world and the first with DVA (Direct Vertical Access).