ROV CLASS INSPECTION

Our Marine Class department was formed through the amalgamation of Geo Oceans' ROV specialists and Vertech Group’s industry-leading Marine Class team to form a single, cohesive unit that prides itself on its pro-active, solutions-based approach. We specialise in the statutory inspections for the classification of ships and offshore floating structures and subsea inspections using the latest ROV technology, proprietary inspection tools and cutting-edge software solutions.

Our team can provide unmanned ROV, RDVI, drone or robotic crawler inspection services to complete hull UWILD, In-Water Survey, mooring chains, riser and tank inspections. The Asset Deployed ROVs can be deployed for underwater Class inspections of oil and gas industry Mobile Offshore Drilling Units (MODU), Floating Production Storage and Offloading (FPSO) and FSO vessels and platform jacket structures.

Asset Deployed ROV systems are designed to eliminate or largely reduce downtime on subsea inspection campaigns to target ‘Zero Downtime’. Each system is designed to optimise the in-water operating limits and the multidisciplined ROV inspection teams can be qualified to perform fall back works such as Rope Access, topside NDT, RDVI or internal ROV water ballast tank inspections.

Drawing on our extensive track record in successful, complex projects and ongoing maintenance works, Geo Oceans uses a specialised suite of data and document management tools to support project delivery through every stage of the project management lifecycle.

The benefits of our Asset Deployed ROV inspection system for remote Class inspection services include:

  • Eliminates the need for support vessels
  • Rapid and low cost mobilization by air freight anywhere in the world
  • Subsea conventional and advanced NDT
  • Specialist cleaning capability for hulls, chains, risers and water ballast tanks
  • Removes the need for divers and dive support vessels
  • Eliminates manned entry into confined spaces
  • Zero or reduced downtime - optimizing operating limits
  • No requirement to dewater ballast tanks
  • Improved data quality and repeatability with HD video and other data recorded in a data management system (e.g. Digital Edge)

PROJECT EXAMPLES

FPSO Ballast Tank Class Survey RTM Inspection

Geo Oceans provided ROV equipment, a specially designed ROV habitat inside a hazardous area on the FPSO and personnel to conduct the class inspections. The scope included the inspection of two internal ballast tanks for ABS class requirements and the inspection of the FPSOs riser turret mooring. The ROV team worked closely with the attending ABS class surveyor to achieve the requirements of the scope successfully.

FPSO In-Water Class Survey (UWILD)

Geo Oceans and Vertech demonstrated the capabilities of the ROV inspection system for In-Water Surveys (IWS) on an offshore FPSO. Tasks included subsea ROV Non-Destructive Testing (NDT), visual inspections and fouling cleaning. The ROV inspection system included hull attachment tools for stabilisation, high pressure & mechanical cleaning tools, CP & Ultrasonic Thickness Measurements (UTM) sensors, sonar for navigation, laser profiler and calliper tools for chain link measurements.

2019 FPSO ROV Turret and External Hull Inspection

Geo Oceans were engaged to complete a Mini-ROV inspection, focusing on the internal and external turret areas as well as all splash zones around the FPSO hull. The scope of work included GVI and CVI on the general structures, UTM around the turret hull plating and subsea advanced NDT including alternating current field measurement (ACFM).

2019 FPSO ROV Moonpool and Hull Inspection

A multidisciplinary Geo Oceans and Vertech team completed a 3-week campaign on a large FPSO. ROVs and RDVI cameras were used to perform GVI and CVI inspections on Moonpool tanks, satisfying DNV GL inspection requirements without having to dewater the tanks. As a value-adding exercise, the ROV was deployed on an external hull section to inspect areas within the splash zone.

Lloyd's Register FPSO Ballast Tank ROV Special Survey

Geo Oceans and Vertech were engaged to plan and execute a ballast tank special survey inspection with the Mini-ROV Class Survey System (CSS). The scope included Class-approved work pack creation, planning and scheduling followed by on-site execution. This included GVI, CVI, HD video, laser scaling, 3D modelling, high-pressure water blasting, and approx. 1000 UTM readings per tank witnessed by the attending Lloyd’s Register surveyor.

Internal and External FPSO Riser Turret Mooring Inspection

Geo Oceans completed a complex asset deployed Mini-ROV inspection scope entailing HD visual inspections, high-pressure water blasting marine growth removal, rotary brush cleaning, proximity & impact CP, NDT inspections, 3D modelling, inclinometer measurements and advanced NDT inspection. The project successfully performed all operations across a range of internal and external structures from within a hazardous area and a confined space area, both of which were previously deemed inaccessible.

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