Case Study 2060 Arthit

Arthit Tanker Modification to FPSO

Rig Name: ARTHIT
Rig Type: Converted Tanker
Owner name: EMAS
Classification Society: DNV
Pertinent code: DNV Modu
In Collaboration with: Mooring Systems Ltd. Risertec.

Model 3D
Please download PDF version to see 3D model – click here

Project description
Conversion of conventional tanker into Floating Production Facility by installing patented Tri Catenary Mooring System (TCMS) and export riser facility at the bow. TCMS system is based on Mooring Systems Limited. (MSL)

FEA Model


R.E. Scope of work
Rig Engineering was tasked by Mooring Systems Ltd. (MSL) to assist with installing MSL Tri Catenary Mooring System (TCMS) and bow modification to allow for the handling of the chain and riser export system. Various structural modelling and strengthening was undertaken to accommodate the dead man anchor, surge connector, chute and gantry system for chain and export riser handling. This work was done to convert Det Norske Veritas (DNV) classed vessel, Kitty Knutsen, in to Floating Production Facility. All submittal to DNV has been done on behalf of MSL Limited and consisting of FEA, installation drawing and technical support during the entire shipyard period until the vessel successfully hook up with pre laid TCMS ground chain and the oil is in full flow. The vessel has since changed the name to ATHIT and operates in South East Asia.
Engagement Condition
1. As built of structure to create 3D FEA model.
2. Static and environmental loads of tanker and mooring system.
Key word: Rig Engineering, Tri Catenary System, TCMS, Mooring Systems Limited., MSL, bow modification, Kitty Knutsen, ARTHIT, EMAS, export riser, tanker dead man anchor, mooring chain surge connector, floating production facility, tanker