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This is an interactive encyclopedia of subsea and marine technology. The information herein is for information only and is not to be relied upon for engineering purposes or purchasing decisions. To edit, contact administrator at

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Overview of a Subsea Production System

A complete subsea oil and gas production system typically consists of several interconnected components that work together to extract oil and gas from under the seabed. These components include:

Subsea wellheads: These are the primary interface between the subsea reservoir and the production system. They provide a means to control the flow of oil and gas from the reservoir and protect the wellbore from external pressures.

Christmas trees: A Christmas tree is a set of valves, pipes, and fittings that regulate the flow of oil and gas from the subsea wellhead to the surface.

Subsea pipelines: These are large-diameter pipes that transport oil and gas from the wellhead to a central processing facility on the seabed or onshore.

Subsea manifolds: These are structures that collect and distribute the oil and gas from multiple wells to a central processing facility.

Subsea control systems: These are electronic and hydraulic systems that are used to control the flow of oil and gas through the production system. They include sensors, actuators, and control modules that allow operators to remotely control the production system.

Subsea production risers: These are vertical pipelines that connect the subsea production system to a floating production platform or a fixed processing facility on the seabed.

Subsea flowlines: These are smaller-diameter pipes that transport produced fluids and gas from the subsea manifolds to the subsea pipelines or risers.

Subsea power and communication systems: These are electrical and communication systems that provide power and data transfer between the surface and the subsea production system.

Subsea intervention equipment: This includes tools and equipment used for inspection, maintenance, and repair of the subsea production system, such as remotely operated vehicles (ROVs).

All of these components work together to form a complex system that allows for the safe and efficient extraction of oil and gas from subsea reservoirs.