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FPSO Prof. John Evans Atta Mills External Turret

 
 
FPSO Prof. John Evans Atta Mills External Turret Image
 
 

Scope of Work

SOFEC designed and fabricated an external mooring system for the FPSO Prof. John Evans Atta Mills (Tullow TEN) and also assisted with the installation and commissioning. The FPSO is located in the Tweneboa, Enyenra, and Ntomme (TEN) fields offshore Ghana.

The SOFEC external mooring system is DNV classed.

FPSO Prof. John Evans Atta Mills External Turret Location Image
 
 

SOFEC designed and fabricated an external mooring system for the FPSO Prof. John Evans Atta Mills (Tullow TEN) and also assisted with the installation and commissioning. The FPSO is located in the Tweneboa, Enyenra, and Ntomme (TEN) fields offshore Ghana.

The SOFEC external mooring system is DNV classed.

FPSO Prof. John Evans Atta Mills External Turret Location Image
 
 

General Description

Client Name:Tullow Ghana Limited
Contract Award:August 2013
Installation Date:Anchor legs pre-laid in Sept. 2015 and vessel hookup in first half of 2016
First Oil:August 2016
Vessel Size:331,841 dwt
Storage Capacity:1,700,000 bbls
Water Depth:1,425m (4,671ft)
Fabrication:Turret - Singapore
Vessel Converison - Malaysia
 
 

Design Environmental Criteria

 
 

100-year storm

Sig. Wave Height:3.8m (12.5ft)
Non Squall Wind Velocity:13.6m/s (26 kts)(1-hr mean @10m)
Squall Wind Velocity:36.5m/s (71 kts)
Current:2.44m/s (4.74 kts)
 
 

Fluid Swivel Assembly

 
 

Low Voltage Electrical Optical Slip Ring
Utility Swivel No. 1 – 690 barg (10,000 psig)
Utility Swivel No. 2 – 345 barg (5,000 psig)
Utility Swivel No. 3 – 20 barg (285 psig)
Low Voltage Electrical Power Slip Ring
1 each Toroidal Swivel Path – Gas Injection
1 each Toroidal Swivel Path – Water Injection
1 each Toroidal Swivel Spare path for Gas Injection, Gas Lift, and Gas Export
3 x 50% Toroidal Swivel paths – Production 1, Production 2 and Production 3
1 each Toroidal Swivel path – Multi-service
1 each Toroidal Swivel path – Gas Lift
1 each Toroidal Swivel path – Gas Export
Medium Voltage Electrical Power Slip Ring
Inlet Section / Suport Base
Torque Arms and Torque Arm Support Structure
Swivel Control System
Fluid Barrier System HPU

 
 

Riser System

 
 

24 riser
7 umbilicals

 
Download Spec Sheet
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