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Installation of Mexico’s largest ever subsea pipeline, running 700 kilometres along the coast from the US / Mexico border at Brownsville, Texas, to onshore plants in Tamaulipas and Veracruz.
Company : Infraestructura Marina del Golfo (TransCanada Energy)
Location : Westen Gulf of Mexico
100 m
Max water depth
Scope of work
- Engineering & installation of ~700 km, 42-inch pipeline
- Pull-out of 42-inch pipe through direct pipe casing at Tuxpan
- 42-inch pipe above water tie-in at Tuxpan
- Pre-pipeline installation dredging of shallow water section
- 545 km post-lay burial by Digging Donald
- Flooding, gauging, hydro-testing & pre-commissioning of the complete system
545 km
post-lay burial by Digging Donald
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Specials & challenges
- Longest submarine pipeline construction in Mexico & first offshore pipeline for TC Energy
- Allseas’ first pipelay project in Mexico
- World’s longest underground micro-tunnel (2.2 km in length, 3.2 m in diameter) protecting sensitive mangroves
- 4x crossings with the Horizontal Directional Drilling technique (HDD) to protect the surrounding ecosystem
- Progressive flooding of the northern section (Altamira to US border) during pipelay for stability purposes (hurricanes)
- Pipeline burial using modified Digging Donald with jetting suspension system
- Manage large fleet of own & subcontracted vessels (incl. dredging, diving & lift boats)
4x
crossings with the Horizontal Directional Drilling technique (HDD) to protect the surrounding ecosystem
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