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Landmark pipelay project covering engineering, procurement, construction and installation of a rigid riser-based subsea system for development of Brazil’s largest oil field, Búzios-10.
Company: Petrobras
Location: Campos Basin (180 kilometres off the coast of Rio de Janeiro)
Water depth: 1720 - 2190 metres
One of the most significant contracts in Allseas’ history
111 km of rigid risers and flowlines in ultra-deep waters
Risers configured in a ‘lazy wave’ formation
Follows successful Rota 1, Rota 2 & Rota 3 campaigns
Scope of work
- Detail design of the risers, pipelines & structures
- Procurement & supply of cladded linepipe & coating materials
- Procurement & supply of installation accessories (incl. flex joints, forgings, valves, diverless connectors, VIV-strakes, riser buoyancy & anchoring systems)
- Design & fabrication of PLETs, jumpers, crossing structures, suction piles & sleepers
- Installation of flowlines & production & injection risers
- Installation of 16x steel catenary risers (incl. flexible joints, VIV strakes & buoyancy modules to enable “lazy wave” connection to FPSO)
- Installation of 16x PLETs & 16x jumpers interconnecting PLETs to Wet Christmas Trees
- Anchoring of the risers & PLETs
- Pre-commissioning services: flood, gauge & hydrotest the pipelines from PLET to FPSO
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Specials & challenges
- Full EPCI scope
- S-lay riser & flowline installation
- Possible pre-installation of pipelines ahead of FPSO arrival
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