The arrangement of underwater equipment — wellheads, flowlines, manifolds, and controls — that connects a seabed well to a surface facility. Subcontractors working in ROV operations, umbilical installation, or inspection services must understand this layout to execute scopes safely. Work packages are often structured around specific architecture components.
Subsea Architecture
Related Terms
Slab-Column Connection
IndustryThe structural joint where a concrete floor slab meets a vertical column, transferring load between both elements. Subcontractors must follow engineered drawings closely here, as improper reinforcement can cause punching shear failure. Inspections at this stage are critical before concrete is poured.
IEA (International Energy Agency)
IndustryAn intergovernmental organisation that publishes global energy outlooks and demand forecasts, which subcontractors and field service companies use to anticipate shifts in upstream and downstream activity levels that may affect project pipelines and contract opportunities.
Design-Build
IndustryA project delivery method where one contractor handles both engineering design and construction under a single contract. As a subcontractor, you may be brought in mid-scope with limited drawing sets, requiring flexibility. Scope creep risk is higher since designs are still evolving while field work begins.
In-Situ
IndustryWork performed on-site without removing equipment or materials from their installed position. Subcontractors are often mobilised specifically for in-situ repairs, inspections, or testing. Scope and billing should clearly reflect the fixed work location.
LOI (Letter of Intent)
IndustryA written commitment from a client indicating they plan to award a subcontractor a contract. It allows work or mobilisation to begin before the formal contract is signed. LOIs are not always legally binding, so subcontractors should clarify payment obligations before proceeding.
Refined Products Pipeline
IndustryA pipeline system that transports processed petroleum products — such as gasoline, diesel, and jet fuel — from refineries to distribution terminals. Subcontractors are commonly mobilised for inspection, maintenance, and integrity work on these lines. Strict product contamination and safety protocols apply, requiring up-to-date certifications.
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