CASE STUDY

Petrex provided Project Management and Engineering support for
an ROV inspection campaign for NEO Energy’s FPSO the GP3.

The support consisted of:

• Scope of work preparation and tendering evaluation
• Management and verification of Subsea Installation Contractor
  procedures and mobilisation readiness
• Workpack preparation and NEXUS database support
• Survey and Inspection Client Representation onboard the vessel
  and FPSO during the campaign
• Close out and as building

Inspection included:

• Hull, Moorings, Turret Inspection
• Riser and Riser Base Inspection
• 3D Riser Scan
• Removal of riser pipeclamps and sensors for riser movement
  monitoring
• Pipeline and umbilical Inspection
• Structure and Wellheads Inspection
• CP readings
• Pipetracker and Multibeam equipment utilised
  The work was completed in July 2023

Riser Workscopes

• There is historical slippage on the buoyancy
  modules on one of the risers at GP3
• A 3D scan was performed on the riser in order
  to model the profile and positions of the
  buoyancy modules and compare with
  previous scans from 2019, 2021 and 2022
• x2 clamps with sensors
  were removed with ROV from the riser. These had been logging movement over a 9 month period.
• The sensors had been installed in 2022 via
  another Petrex managed workscope in
  collaboration with a ROV design company and
  subsea contractor.

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