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sealed, the water inside the turret annulus can be pumped out allowing dry

inspection of the friction pad assemblies.

Deck Turret Structure

The turret extends between the top of the turret cylinder and the swivel

stack, and includes two main areas:

1. The turret main deck and manifold area

2. The swivel deck

Turret Main Deck

This deck is supported by the turret cylinder and functions as a non-rotating

base for the incoming fluid transfer system. This deck is fabricated in welded steel

plate and beams, and has a circular plan form.

The deck is surrounded by a gutter to stop any waste products from leaking

onto the FPSO deck. A drainage system, for piping and possible spills is integrated
into the slops system.

The deck supports the manifold structure: which is hung off below, and the
swivel deck. The manifold area serves as an access to crude oil production lines

before their entry to the swivel stack.
Swivel Deck - this deck is located above the turret main deck and supports

the swivel stack. A central opening is provided for the passage of the swivel entry

piping and cabling.

Overhead Gantry Structure

The overhead gantry structure is mounted on the FPSO deck, over, but

independent from the earth bound turret top part.

The gantry supports a traveling hoist crane suitable for maintenance

activities in the turret area, and can handle the swivel stack modules, either in the

maintenance mode or as part of a field expansion development.

Swivel Stack Assembly

The swivel stack assembly consists of an inner non-rotating ring and an

outer rotating ring that encloses a toroidal shaped chamber. The individual swivel
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