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Turret Mooring Systems

Introduction

One of the most efficient mooring systems in harsh environments is the turret system. This system can be described as the ship being pinned to the seabed. The seabed part is a fixed and static part while the attachment to the ship is free to rotate around the anchor legs.  The rotating device can be attached to the hull in different ways and also in different locations on the ship. This depends on variable factors like the design of the ship, length, process requirements and accessibility. Due to this variety in location of the turret systems, is it possible to distinguish different types of turrets. The main types of turrets are the internal and external turrets.

 Main components of the turrets

 Turret and turret casing

As mentioned before the system consists of a static part attached to the seabed. This part is called the turret. The other part rotates and is placed inside the hull. This part is called the turret casing. These two parts are joint by means of a main bearing.

 

Turntable

The turntable is a structural platform on top of the turret that accommodates various units such as pig launchers/receivers, chain tensioning winches, riser pull-in punches, electrical/control units, leak skids etc.

 

 

 

 

Turret Turntable System