Seanamic Group’s unit Caley Ocean Systems has trialled its intervention work over control system (IWOCS) deployment system, to test the manifold functions on four deepwater subsea manifolds.

The self-contained portable skid features A-frame, umbilical reeler / power unit and deployment frame.

The IWOCS system was deployed from a vessel, and evaluated manifold mounted valves through the manifold subsea control module (SCM). The deployment frame was overboarded and retrieved using the IWOCS umbilical.

It is designed to provide the subsea interface for the umbilical, hydraulic flying lead and two electrical flying leads that facilitate subsea manifold with electro-hydraulic power and communications.

"The ability to use a wide range of vessels of opportunity brings a new level of efficiency to deepwater interventions."

Caley Ocean Systems sales director Gregor McPherson said: "The ability to use a wide range of vessels of opportunity, and the Caley IWOCS deployment system’s integrated design and operation, brings a new level of efficiency to deepwater interventions."

The A-frame and docking unit manage the IWOCS subsea deployment frame and umbilical. Once in the water, the deployment frame is guided subsea by remotely operated underwater vehicle (ROV).

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Compared with traditional IWOCS reeler and sheave arrangement, the IWOCS system is said to occupy less deck space, and is safer and efficient.

The system is designed for use in sea state six conditions, while supporting intervention and work during operations in various weather.

Image: IWOCS deployment frame ready for overboarding. Photo: courtesy of Caley Ocean Systems.