BTM mooring system

 

 

RTM mooring system

 

 

 

Internal Disconnectable Turret (BTM Mooring System)

This system is of a similar principle as the internal turret system. The system provides large transfer capacity and allows the FSPO to operate in harsh environmental conditions in medium operation depths.  For this system, the internal turret is integrated into the forward end of a tanker or barge. A large collet-type connector connects the turret to a mooring buoy. This has sufficient buoyancy to support the weight of the chain legs and risers. For reconnection it is sufficient to pull up the buoy under the ship. This is done with a wire rope hauled in on a drum winch. When the vessel leaves, the column remains on location.

The main advantage of this system is that it allows the FPSO to disconnect itself to avoid any typhoons, hurricanes, icebergs and other extreme dangers. Years of experience and development has achieved that nowadays the disconnect-reconnect sequence is very quick, safe and reliable.

 

External turret

An external turret is structural comparable to an internal mooring system. The turret itself is placed outside the hull through a rigid structure at the bow or at the aft of the tanker. A disadvantage is the fact that here the amount of risers is very limited. The building process do not has to be performed on a dry-dock which reduces cost and delivery time. The weight of the system is also less than an internal turret which saves on steel. The system is normally applied to FPSO in shallow waters and small oil or gas fields. There are disconnectable external turrets as well.

 

External disconnectable Turret (RTM Mooring system)

An external disconnectable turret is mounted on the bow of a vessel. It disconnects automatically in two stages. During the first stage the risers are being isolated. Successively the riser column is being disengaged by a large hydraulically operated collet-type connectors. From the moment the tanker is disconnected it will sail away, while the column remains on location.

 

 

 

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