The image shows an oil platform, a complex, mobile, very large metal structure, located offshore, on a marine oil field.
These metal structures are equipped with installations, machinery and workers, in order to exploit the offshore oil field, drill or extract from these sources found at great depths, crude oil and natural gas, which will later be shipped to shore, from where they will be processed and refined.
The platforms can be fixed, requiring very high costs and long time for the construction and anchoring directly onto the seabed, but can also be flexible, more economical, consisting of compliant towers, semi-submersible platforms, floating production systems etc.
The image shows a fixed marine platform built on concrete or steel legs, here, made of tubular steel members, anchored by their bottom tanks to depths of up to one hundred meters, on the ocean floor or the seabed.
The tanks piled into the seabed are not illustrated here, but you can touch the steel tubes, called the elevating racks, which rise on the tanks to a certain level, from where it is continued with the body of the platform called the hull, on which are the installations and equipment for drilling and even production facilities and the crew quarters.
The elevating steel racks are shown at the bottom and top, in the form of four pairs of two vertical lines, parallel and thickened, each framing a column of blank triangles, placed with the tip up, one on top of the other.
The hull of the platform is highlighted in the central part as a horizontal rectangle, thin, embossed, on which are mounted two vertical lines, very thick, one on the left and one on the right, at the top of which is a thick triangle, joined at the bottom by a small, embossed square.
These lines represent the mechanical cranes that offer workers access to different levels of the platform.
The pyramidal drilling tower, called the derrick, through whose pumps oil or natural gas is extracted from the sea platform, is the tallest and most voluminous structure, marked on the left edge, in the form of two vertical lines, thickened and parallel, approaching one of another towards the top.
Between the two lines is a column of crosses, widened at the bottom, which narrow in size towards the top.
On the right and left edge of the deck are the living quarters, the control room and the workstations for petroleum processing, service and maintenance.
They are rendered by an elevation of the rectangular hull in two embossed squares, at the left and right ends.
After the workers’ cabins on the right, the deck is continued with a small flight deck designed for the helicopter, rendered by a horizontal, thickened line, located on a row of blank triangles.