INTERNAL TURRETS
Unit Type: FPSO
Mooring: Internal turret
Client: Bumi Armada Berhad
Field: ONGC D1 Field, offshore India
WD; 91 metres
No.of Risers: 6
The Project scope included the development and preliminary detail design and arrangement of the internal turret mooring system to be used in the D1 FPSO.
The design work included the provision of the mooring arrangement, mooring line and riser handling systems, swivel arrangement, turret integration in the vessel and basic specifications..
The turret mooring system utilized a 3×3 all chain mooring lines terminating in HHP anchors.
Unit Type: FPSO
Mooring: Internal turret
Client: Teekay Petrojarl
Field: Van Gough, offshore Australia
WD: 350 metres
No of risers: 5
The Project scope included the conceptual and detail design for the modification of the existing internal turret mooring into a dis-connectable internal turret mooring.
The scope included the shaft modifications, design of a compact structural connection system for locking onto the mooring buoy, piping system connections and routing through the swivel stack, turret winch and hydraulic power unit, buoy recovery system and umbilical connection system. All the turret systems were required to be accommodated in the existing design and arrangement of the internal turret on the FPSO.
When completed the turret mooring would connect to the DTM buoy and provide connections and flow paths for production, water injection, gas lift and umbilical risers.
EXTERNAL TURRETS
Unit type: FPSO
Mooring: External Turret
Client: Rubicon Offshore International
Field: Galoc , Phillipines
WD: 350 metres
No of risers: 6
Promor’s scope included the complete detailed engineering of an external turret mooring system to be used on an FPSO in a harsh environment. All elements were covered including the structural, mechanical, piping, E&I, fluid transfer and material handling systems.
The mooring system utilized a 3×3 arrangement with chain wire chain configuration terminating in HHP anchors.
The turret mooring system utilized a Promor proprietary self aligning main bearing system to compensate for vessel deflections and allow in situ maintenance and overhaul.
Unit type: FPSO
Mooring: External Turret
Client: Sabah International Petroleum
Field: Limbayong, East Malaysia
WD: 1500 metres
No of risers: 18
Promor’s scope included the complete detail design of the external turret including the turret head, shaft, rigid arm, piping systems, swivel stack, bearing system, mooring lines and suction piles, material handling including mooring line tensioning and riser handling systems.
The mooring system utilized a 3 x 3 arrangement with polyester mooring lines terminating in suction piles.
The turret bearing system utilized a Promor proprietary multi-roller system for axial and radial loads to allow for increased space for moorings and risers and associated piping.