InstallREF 01
FSO CALM buoy export terminal
- Provision of 800-tonne CALM buoy
- Infield flowlines
- Mooring installation
- Buoy installation
- Subsea and floating hose installation
- FSO modification and deployment
- Field hook-up and commissioning
Marlin Subsea
Floating production & subsea services for West & Central Africa
One contractor for the whole life of the field, from installation to decommissioning.
About Marlin Subsea
One contractor for the whole life of the field
Marlin Subsea is the offshore engineering and subsea services division of Marlin Energy Resources Ltd, a Nigerian-owned energy services company headquartered in Lagos, serving offshore operators across West and Central Africa.
We bring international offshore construction experience to operators across West and Central Africa. Our delivery team and technical partners have installed, moored, hooked up and decommissioned floating production units across West Africa, the Gulf of Mexico and Latin America. We pair that experience with a regional base in Lagos and a focus on the integrity of assets already in service.
Our services cover every phase of an offshore production asset: installation, mooring and hook-up, SURF and risers, inspection, maintenance and repair, life extension and, at the end of field life, safe removal.
What we do
Services across every phase of the field
Operators can bring us in for a single scope or for the whole life of an asset. The same team carries knowledge of the asset from installation into operations and, finally, removal.
01
Install
- FPSO & FSO installation
- Field development marine services
- Tanker conversions to FPSO / FSO
- Offshore construction vessels
02
Moor & connect
- Spread mooring systems
- CALM buoys
- SURF installation
- Production risers & pull-in
03
Operate
- Client representation
- Offshore project support
- Subsea engineering consultancy
- Digital engineering
04
Maintain
- Inspection, maintenance & repair
- ROV project management
- Asset integrity management
- Mooring change-out
- Asset life extension
05
Decommission
- FPSO & FSO removal
- Fixed-platform removal
- Riser & mooring recovery
- Environmental recycling
One contractor, fewer interfaces
A single point of responsibility from mooring pre-set through hook-up, maintenance and removal.
Regional base
A Lagos-based company serving operators across West and Central Africa, with local participation built into delivery.
International delivery experience
Our delivery team and technical partners have executed FPSO, mooring, SURF and decommissioning projects for international and national oil companies.
Engineering-led equipment
Mooring, pull-in and installation equipment designed in-house and matched to each operation.
01 · Install
Floating production units, installed and on station
We deliver FPSO and FSO installation as a full EPCI scope, combining marine operations and installation engineering with custom offshore equipment. Every deployment is fit for purpose, matched to the field's production requirement.
EPCI scope
- Engineering and fabrication of deck mooring equipment
- Engineering, fabrication and integration of installation equipment
- Project management and engineering of mooring pre-set and hook-up
- Project management and engineering of riser installation and hook-up
- Offshore execution
Field development services
- FPSO and FSO deployments
- Tanker conversions to FPSOs and FSOs
- EPC mooring and SURF packages
- Spread mooring systems
- Offshore installation services
Selected projectsArmada Perdana FPSO, Oyo field, Nigeria, 425 m · Armada Perkasa FPSO, Nigeria, 13 m · FPSO TN, Front Puffin and FSO Eli Akaso, Nigeria · FSO Ratu Songkhla, Indonesia · FPSO re-deployment, West Africa (2026)
02 · Moor & connect
Holding production assets on station
A mooring system holds a vessel on station in operating and survival conditions, within specified tolerances. We manage every part of offshore mooring installation: engineering, fabrication, offshore installation, hook-up and testing.
Delivery record: mooring installations executed by our delivery team have been completed ahead of schedule, under budget and without safety incident.
Scope
- Spread mooring systems for FPSOs and FSOs
- CALM buoy installation, maintenance and repair
- Mooring change-out on producing assets
- Mooring equipment, hardware and systems supply
Deck mooring systems
From concept design through detail design, fabrication and integration to offshore operation: chain stoppers, fairleads, wildcats, winches and chain jacks, engineered as one system.
Selected projectsForcados Export Terminal, Nigeria · FSO Safer 9-point mooring and CALM buoy, Red Sea · Thunder Horse chain mooring, 1,844 m · Sendje Berge mooring replacement, Nigeria · SPM3 CALM buoy, Nigeria · 800 t CALM buoy terminal (2026)
02 · SURF & production risers
Subsea umbilicals, risers and flowlines
We install subsea umbilicals, risers and flowlines (SURF), with installation equipment designed, specified and proceduralised in-house.
- Umbilical and riser installation, termination and hook-up
- Umbilical and riser installation equipment, including in-house designs, specifications and procedures
- Subsea inspection, maintenance and repair
- Installation of subsea manifolds, trees, PLEMs, PLETs and jumpers
Production riser projects
Steel catenary and flexible production risers, installed and decommissioned under one project management team.
Installation
Procedures, equipment, vessel and offshore execution
Pull-in
Pull-in equipment design, delivery and operation
Ancillaries
Mats, receptacles, bend stiffeners and installation aids
Removal
Flushing, disconnection and removal from the host facility
Selected projectsAtlantis, deepest SCRs ever installed, 2,150 m · Stampede TLP, 8 SCRs, US Gulf of Mexico · Thunder Horse production risers · Front Puffin and Tamara Tokoni riser systems, Nigeria · Armada Perdana riser pull-in, Nigeria
03–04 · Operate & maintain
Keeping assets in service, safely and for longer
Once an asset is producing, Marlin Subsea protects its integrity with planned inspection, maintenance and repair, ROV operations and engineering support.
InspectGeneral and close visual inspection, ROV surveys, CP and thickness data
AssessIntegrity assessment, anomaly management and risk ranking
Maintain & repairPlanned and reactive IMR campaigns and repair engineering
ExtendLife extension studies and asset upgrades
Inspection, maintenance & repair (IMR)
Planned and reactive IMR campaigns for subsea infrastructure, risers, moorings and floating assets.
ROV project management
Scope definition, spread selection, offshore supervision and reporting for ROV campaigns.
Asset integrity management
Integrity strategy, inspection planning, anomaly tracking and risk-based maintenance.
Subsea engineering consultancy
Independent engineering support for operators and contractors, from concept to operations.
Digital engineering & life extension
Data-led assessment of remaining life, and the engineering needed to extend it.
Client representation
Owner's representatives and offshore project support, from planning to offshore execution.
What operators receive
- Inspection reports and survey data
- Anomaly registers and risk rankings
- Integrity management plans
- Repair procedures and engineering
- Life extension studies
Connected to installation
Because the same team installs moorings, risers and SURF, our IMR engineers start from as-built records and installation data. Anomalies are assessed against how the asset was actually put in place.
Selected projectsOML 119 subsea intervention, Nigeria · Tamara Tokoni mooring life extension and IMR, Nigeria · Sendje Berge inspection and IMR, Nigeria · FPSO TT life extension, 2009 and 2019 · OML 122 FPSO FEED, Nigeria
05 · Decommission
Safe, planned removal at the end of field life
FPSO & FSO decommissioning
Our delivery team has executed FPSO and FSO decommissioning projects for international and national operators.
- NORM removal and tank cleaning
- Deck equipment refurbishment
- Flushing of risers and umbilicals
- Disconnection and removal of risers and umbilicals
- Disconnection and abandonment of mooring lines
- Station keeping of the FPSO
- Towing operations
- Planning and management of all marine operations
Fixed platform decommissioning
Full removal and abandonment services, including:
- 3D scanning and engineering
- Offshore procedures and abandonment requirements
- Flowline flushing
- Heavy lift vessels and offshore construction crews
- Environmental recycling of removed structures
Selected projectsFSO Safer, Red Sea, Yemen · Xikomba FPSO, Angola, 1,310 m · Largest FSO (ULCC) of Mexico’s national oil company, Gulf of Mexico
Engineered equipment
Equipment engineered for the operation
We specify, design and supply offshore equipment matched to each operation. Our marine operations experience and engineering capability let us evaluate the functional requirements in detail, so the equipment fits the user and the application.
Riser pull-in systems and deck mooring systems are delivered from concept design through detail design, fabrication and integration to offshore operation.
100 tonnemooring winches designed and delivered
Custom designs
A-framesOverboarding and subsea deployment
WinchesMooring, pull-in and installation winches
TensionersLay and installation tensioners
Chain jacksMooring line tensioning
Wildcats & fairleadsChain handling and guidance
Riser pull-in systemsConcept to offshore operation
Vessel equipmentMulti-purpose anchor-handling equipment
Construction vesselsMarine construction vessel design
Installation aidsBespoke aids for each scope
Selected projects1,250 t chain jack SCR pull-in system, Atlantis · Complete EPS vessel mooring system, Venezuela · Armada Perdana deck mooring and riser pull-in equipment · Thunder Horse rigging and installation aids
Delivery experience
Experience behind Marlin Subsea
22 major projects executed by the Marlin Subsea delivery team and technical partners between 2005 and 2026: from the shallowest FPSO ever installed (13 m) to the deepest steel catenary risers ever installed (2,150 m), across Nigeria, West Africa, Angola, the Gulf of Mexico, Venezuela, the Red Sea and Indonesia.
22Major projects, 2005–2026
2,150 mDeepest SCRs ever installed (Atlantis)
13 mShallowest FPSO installed globally (Armada Perkasa)
15Projects in West & Central Africa, including Nigeria and Angola
Nigeria · 11 projectsForcados · Oyo · Armada Perkasa · FSO Eli AkasoFPSO TN · Front Puffin · Tamara Tokoni · Sendje Berge
OML 119 · OML 122 · SPM3 CALM buoyAngolaXikomba FPSO decommissioningRed Sea, YemenFSO SaferUS Gulf of MexicoAtlantis · Thunder Horse · StampedeGulf of Mexico, MexicoFSO decommissioningVenezuelaEPS mooring systemIndonesiaFSO Ratu Songkhla
Nigeria, home base Project locations
Nigeria · 11 projectsForcados · Oyo · Armada Perkasa · FSO Eli Akaso · FPSO TN · Front Puffin · Tamara Tokoni · Sendje Berge · OML 119 · OML 122 · SPM3 CALM buoy
AngolaXikomba FPSO decommissioning
Red Sea, YemenFSO Safer
US Gulf of MexicoAtlantis · Thunder Horse · Stampede
Gulf of Mexico, MexicoFSO decommissioning
VenezuelaEPS mooring system
IndonesiaFSO Ratu Songkhla
Project references
22 project references
Projects executed by the Marlin Subsea delivery team and technical partners. Filter by phase.
InstallREF 02
FPSO re-deployment project
- FPSO shipyard and re-deployment scope
- Field SURF package
- Conversion to spread mooring
- Conversion to mid-ship riser porch
- Topsides conversion to field production specification
DecommissionREF 03
FSO Safer replacement and decommissioning
- Disconnection and recovery of turret mooring system
- Disconnection and recovery of production risers
- Ship preparation and delivery of hull for recycling
- Installation of 800-tonne CALM buoy
- 9-point mooring installation
- Subsea hose installation
- Commissioning and start-up of offloading export terminal
- VLCC loading operations start-up
Moor & connectREF 04
Forcados Export Terminal emergency restoration
- Emergency restoration of the export terminal
- Replacement of CALM buoy with tri-catenary mooring and floating hose offloading system
- PLEM, subsea and surface floating hose assembly
- Tri-catenary mooring positioning system for VLCCs
- Procurement through global vendor network
- System commissioning and testing
Second-largest crude offloading terminal in Africa
InstallREF 05
FSO Eli Akaso installation
- EPC of FSO installation scope
- Mooring pre-set: 14 mooring lines
- Mooring proof load of 270 tonnes
- FSO tow and positioning
- FSO mooring system transfer and hook-up
- FSO mooring tensioning
InstallREF 06
FPSO TN conversion and re-deployment
- EPC FPSO conversion and re-deployment
- Turret to spread mooring conversion
- Deck mooring equipment
- Riser porch
- 12-point mooring pre-set
- FPSO tow and hook-up operations
- Riser installation and hook-up
InstallREF 07
FPSO Front Puffin
- EPC construction and delivery
- Mooring system installation
- Production riser system installation
- Installation of the unit
- Production riser hook-up and commissioning
MaintainREF 08
FPSO Tamara Tokoni
- EPC scope with procurement through global vendor network
- Mooring system life extension
- Production riser system tie-back
- FPSO installation services and IMR
- Production riser hook-up and commissioning
MaintainREF 09
FPSO Sendje Berge mooring replacement
- EPC scope
- Mooring system replacement
- Mooring system inspection
- General IMR
DecommissionREF 10
Decommissioning of Mexico’s largest FSO (ULCC tanker)
- FSO decommissioning engineering package
- 36-inch pipeline decommissioning
- Removal of two 16-inch production risers
- Crude storage tank cleaning
- Disconnection and removal of 10 turret mooring lines
- FSO positioning and station keeping
- Removal from site and international tow
- Delivery for ship recycling
MaintainREF 11
FPSO TT life extension
- EPC FPSO life extension
- Flexible riser installation
- SURF integrity inspections
- Mooring recovery, re-certification and re-installation
- Third-party topsides refit and refurbishment
- Mooring pre-set and re-installation
Delivered twice, ten years apart
MaintainREF 12
OML 119 subsea intervention and FPSO services
- Subsea intervention vessel
- Subsea intervention equipment spreads
- Subsea intervention services
- FPSO field services
EngineeringREF 13
OML 122 FPSO field development FEED
- Topsides FEED
- Hull FEED
- Production risers FEED
- Moorings FEED
Moor & connectREF 14
Stampede TLP production risers
- Eight steel catenary production risers (SCRs), installed at 1,000 m depth
- Riser pull-in system engineering and SCR installation system
- Integration of the installation system on the TLP
- SCR installation engineering and procedures
- Offshore installation of all risers
- Interface with the operator, installation contractor and engineering contractor
Under schedule, under budget, zero incidents
Moor & connectREF 15
Thunder Horse mooring and risers
- Chain mooring system installation
- Production riser installation
- Mooring chain jack replacement procedures and modifications
- Equipment and specialised design engineering
- Installation aids engineering and construction plan
- Mooring hang-off procedures and rigging equipment design
Moor & connectREF 16
Early production vessel mooring system
- Design and delivery of the complete vessel mooring system
- Mooring fairleads, chain stoppers and monitoring system
- Mooring pull-in winches
DecommissionREF 17
Xikomba deepwater FPSO decommissioning
- Project management and client representation
- Decommissioning and disconnect procedures, review and approval
- NORM removal and cargo tank cleaning
- Flushing, disconnection and removal of risers and umbilicals
- Disconnection of turret moorings; turret refurbishment
- FPSO station keeping, positioning and short tow
MaintainREF 18
SPM3 CALM buoy repair
- Mooring analysis
- Repair engineering and procedures
- Supply of all offshore construction crew and supervisors
- Management of vessels and offshore crew
- Offshore mooring and floating hose repair and adjustment
- CALM buoy returned to operation
InstallREF 19
Oyo field: Armada Perdana FPSO installation
- Shipyard conversion scope; mooring deck equipment and riser porch design, delivery and integration
- Riser pull-in system design
- Supply of ROV system
- Conversion of a mid-sized AHTS to a subsea construction vessel
- Offshore mooring pre-set
- FPSO mooring hook-up and positioning
- Riser pull-in and hook-up
Full EPCI, from shipyard to first oil
InstallREF 20
Ratu Songkhla FSO installation
- Project management and client representation
- Installation procedure review and approval
- Mooring pile and mooring installation
- Hook-up to turret moorings
- Flowline, riser and umbilical installation
- Offshore positioning and station keeping
InstallREF 21
Armada Perkasa FPSO installation
- EPIC installation contract and installation engineering
- Deck pull-in equipment preparation
- Supply of chartered marine spread
- Conversion and upgrade of main installation vessel
- Supply of installation components and aids
- Mooring pre-set, FPSO hook-up and positioning
- Riser pull-in and hook-up
Shallowest FPSO water depth installed globally
Moor & connectREF 22
Atlantis production semi-submersible riser installation
- Installation and assembly of 1,250-tonne chain jack SCR pull-in system
- Management and execution of all riser pull-in operations at 2,150 m
- Client representative for review of J-lay pipelay procedures
- Client representative for all hook-up operations
Deepest steel catenary risers ever installed
Also delivered for a Nigerian national oil company (FPSO mooring change-out) and a major subsea contractor (mooring and SURF support).
How we work
Our values spell TEAM
The four principles behind how every project is planned and delivered.
T
Technical excellence
Engineering-led planning, proven procedures and equipment designed for the operation.
E
Environmental care for a clean ocean
A clean ocean is part of every scope, from NORM removal to recycling removed structures.
A
Autonomous safety-first culture
Every person on the job owns safety and has the authority to act on it, from the first procedure to the last lift.
M
Manage business to ensure commercial value
Each project is managed to deliver commercial value of service for both the client and the company.
How an engagement runs
- Scope definitionSite data, field requirements and the operator's constraints
- EngineeringInstallation analysis, equipment specification and procedures
- Procurement & fabricationEquipment, vessels and materials, integrated and tested
- Offshore executionMarine operations under one project management team
- Close-outAs-built records, handover and integrity baseline for IMR
Local content
We plan each scope around the operator's local-content requirements, building local participation into how the work is planned and delivered in each country.
Working with operators
We can take on a single scope, such as a mooring change-out, or support an asset for its full life, from installation through maintenance to removal.
Company profile
Download the Marlin Subsea brochure
Our 2026 company profile for West and Central Africa: services across every phase of the field, engineered equipment, delivery experience, 22 project references and our approach to HSE. Available in English, French and Portuguese.
Health, safety & environment
Safety is planned in from the first procedure
Leadership and accountability
Line managers own HSE performance, and every person on the job has the authority to stop unsafe work.
Risk management
Hazard identification, job safety analysis, permit-to-work and management of change on every scope.
Competence
Offshore survival (BOSIET / HUET), valid medicals and role-specific training for all personnel.
Emergency preparedness
Project emergency response plans, bridging documents with the client and regular drills.
Environment
Waste, NORM and spill prevention managed to national and international regulatory requirements.
Reporting and learning
Incidents and near misses reported, investigated and shared so lessons reach every crew.
On every scope
- Risk assessments and method statements
- Approved procedures before mobilisation
- Toolbox talks and permit-to-work offshore
- HSE reporting to the client throughout