Swivel and marine systems

OneSubsea engineers, produces, and delivers swivel stacks and fluid transfer systems featuring compact designs and innovative technology, providing our customers with compact and highly integrated solutions.

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OVERVIEW

Why OneSubsea swivel and marine systems?

The swivel stack is at the heart of the turret mooring and fluid transfer system (FTS). The swivels ensure that all fluids, controls, and power are transferred safely from geostationary parts (such as wells, flowlines, manifolds, and risers) to the rotating vessel and its processing plant.

We have accumulated more than 4.3 million operational hours and 25 years of field experience with 99.7% uptime for our swivel and marine systems. This track record has given us the confidence to say our designs can endure even the most challenging offshore environments.

25

years of experience

4.3

million operational hours

99.7%

uptime

FLNG, FPSO and FSO vessels

Flexible swivels designed for the reliable transfer of oil and gas production, chemicals, water, electric power, hydraulics, and signals.

Submerged loading

Submerged loading systems for minimized risk and robust performance in challenging environmental and operational conditions.

Integrated and compact systems

Complete and compact solutions to ease fluid transfer systems topside and subsea.

Core benefits

OneSubsea is a total system supplier, with the skills and expertise to provide engineering and delivery of complete swivel and marine systems.

Flexibility and versatility

Each swivel design is independent of the flowing medium, while modularized swivel systems are made to suit different pressures and capabilities.

Safety and reliability

Our swivel stacks use proven technology, innovative design, and robust engineering, with a focus on maintaining uptime and ensuring personnel safety.

Data-rich diagnostics

Our remote surveillance and diagnostics system provides real-time data readings, data management, and condition monitoring of your swivel and marine systems.

Application

Increased reliability through proven design, quality of personnel, manufacturing capabilities, and complete system testing
Flexibility and versatility as standard, with each swivel ring independent of the flowing medium
Transfer fluids safely to the rotating vessel and process plant under any field conditions

Features

Dynamic seals prevent flow from leaking out of the ring volume to other parts of the environment
High-pressure capability
Green-light philosophy confirming system availability before startup and during all phases of the operation