How Is The Submarine Oil And Gas Pipeline Built?

Its name is simple, but the construction technology and technical content is quite high. It is the “lifeline” of the offshore oil and gas production system – “submarine oil and gas pipeline”. No matter how an offshore field is developed, it is necessary to transport oil and gas from inside the formation to a platform, FPSO or onshore terminal, and laying a subsea pipeline is the most direct and efficient way to transport it.

What Does A Subsea Pipeline Look Like?

Submarine pipeline is laid on the seabed, continuous transport of oil, gas, water pipeline. To draw an analogy: offshore oil and gas facilities are a valuable “point”, only through the “line” such as oil and gas pipelines to connect the “point”, in order to form a complete system, play the overall value of the production system.

△Subsea flat pipe: laid on the bottom of the sea, is the main force of submarine oil and gas transportation.

△Expansion bend pipe: Used to connect the subsea flat pipe and riser. Affected by the temperature difference of sea water, the steel pipe has the phenomenon of thermal expansion and cold contraction, and the expansion bend pipe can compensate for the change of the length of the sea pipe.

△Riser pipe: A vertical pipe on the seafloor that connects a flat pipe on the seafloor to an offshore production facility.

△The riser pipe in the shallow water are steel tubes fixed to the legs of the platform.

△Deepwater vertical pipe usually stand in the water in a free state, such as top pre-tension risers (TTR), steel catenary risers (SCR), flexible risers, tower risers, etc.

△Cross-connection: Connects the tree to the production manifold.

According to the output of oil field (oil, gas, water) and production, select the corresponding pipe diameter and structure of the offshore pipe.