What are oil rigs? It is a structure or building that being used to house workers and machinery needed to drill wells for oil and gas. Below are some types of offshore structures:
Fixed platform.
This type of rig is built on steel or concrete legs anchored directly onto the seabed, supporting a deck with space for drilling rigs, production facilities and crew quarters. Such building are, by virtue of their immobility, designed for very long term use. Various types of structure are used, steel jacket, concrete caisson etc. Steel jackets are vertical sections made of tubular steel members, and are usually piled into the seabed. Fixed platforms are economically River Boat Selling for installation in River Boat Selling depths up to about 1,700 feet (520 m).
Semi Submersible Platform
The platform has hulls (columns and pontoons) of sufficient buoyancy to cause the structure to float, but of weight sufficient to keep the structure upright. Semi-submersible is a mobile structure, can be moved from place to place; can be ballasted up or down by altering the amount of flooding in buoyancy tanks; they are generally anchored by combinations of chain, wire rope and/or polyester rope during drilling and/or production operations, though they can also be kept in place by the use of dynamic positioning. Operation area is in water depths from 200 to 10,000 feet (60 to 3,050 m).
Jack-Up Platforms
As the name of this oil rigs, it is a kind of platform that can be jacked up above the sea using his legs which can be lowered like jacks.
Typically used in water depths up to 400 feet (120 m), and might be some design up to 170 meters. They are designed to move from place to place, and then anchor themselves by deploying the legs to the ocean bottom using a rack and pinion gear system on each legs.
Drilling ships
A drillship is a ship or vessel that has been fitted with drilling apparatus / equipment. It is most often used for exploratory drilling of new oil or gas wells in deep water but can also be used for scientific drilling. This building usually prepared with a dynamic positioning system to maintain position over the well. They can drill in water depths up to 12,000 feet (3,660 m).
Tension Leg Platform.
TLPs is a floating platforms tied to the seabed in a manner that eliminates most vertical movement of the structure. This structure is used in water depths up to about 6,000 feet (2,000 m).
There are many other type of offshore structures that has been invented for the purpose of Oil Gas exploration and exploitation. Should you need more article, you can read it at Oil Rigs
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