The Underwater Inspection of Lagos SBM (Single Buoy Mooring) was conducted to assess the structural integrity, functionality, and safety of the mooring system used for offshore crude oil transfer. This critical infrastructure plays a vital role in the region’s energy sector, facilitating the efficient loading and offloading of petroleum products. The inspection aimed to identify potential hazards, corrosion levels, and any necessary maintenance to ensure uninterrupted operations.
The scope of work included:
Visual Inspection: Conducted by expert divers and remotely operated vehicles (ROVs) to examine the buoy structure, anchor chains, and piping.
Non-Destructive Testing (NDT): Utilizing ultrasonic thickness gauging, magnetic particle inspection, and cathodic protection system evaluation.
Marine Growth Removal: Cleaning of biofouling to enable accurate assessment.
Leak and Corrosion Assessment: Checking for structural degradation and potential failure points.
Reporting & Recommendations: A detailed report with findings, risk assessments, and recommended maintenance actions.
The primary objectives of this inspection were:
To evaluate the overall condition of the SBM and its components.
To detect structural weaknesses, corrosion, or marine growth that could impact performance.
To ensure compliance with international safety and environmental regulations.
To provide recommendations for preventive maintenance and repairs.
Harsh Marine Conditions: Strong currents and poor visibility were mitigated using advanced sonar imaging and high-powered ROV lighting systems.
Biofouling & Marine Growth: High-pressure water jets and manual cleaning techniques were used to remove accumulated debris.
Limited Downtime for Inspection: A well-coordinated plan minimized disruptions to SBM operations, ensuring efficiency.
ROVs & Diver Inspections – For high-resolution imaging and close-up assessments.
Ultrasonic & Magnetic Testing – To detect corrosion and structural weaknesses.
3D Sonar Mapping – For digital modeling of the SBM.
Biofouling Removal – High-pressure water jets for cleaning.
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