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IndustryGlossary Term

Topside Fabrication

The construction and assembly of the above-water structures on offshore platforms, including decks, modules, and processing equipment, where subcontractors are typically engaged for specialised trades such as structural welding, pipefitting, electrical, and instrumentation work. For field service companies, topside scopes often involve strict offshore safety certifications, remote logistics, and milestone-based billing tied to fabrication progress.

Related Terms

Heavy Civil Contractors

Industry

Companies that build large-scale infrastructure such as roads, bridges, pipelines, and earthworks. For subcontractors, they are common prime contractors who hire specialised field crews and equipment operators. Understanding their project structures helps subs navigate bidding, scheduling, and payment terms.

AFE (Authorization for Expenditure)

Industry

A budgeting document used in oil and gas projects that outlines expected costs and seeks approval before work begins. Subcontractors often work under AFEs issued by operators.

Natural Decline Rate

Industry

The rate at which a well's production drops over time without operator intervention. For subcontractors, this signals reduced worksite activity and fewer service calls as output falls. Anticipating decline helps crews and companies plan for shifting demand across a field.

Alternative Delivery Models

Industry

Contracting arrangements beyond traditional lump-sum or day-rate structures, such as alliance, integrated project delivery, or performance-based contracts. These models shift how subcontractors are engaged, paid, and held accountable for outcomes. Understanding them helps field service firms assess risk, pricing strategy, and scope responsibilities before signing.

Frac Fleet

Industry

A complete set of hydraulic fracturing equipment deployed together at a well site, including pumps, blenders, and support units. For subcontractors, a frac fleet mobilisation often triggers large, time-sensitive labour and equipment contracts. Knowing fleet size helps you scope crew requirements and forecast workload duration.

BPD (Barrels Per Day)

Industry

A measure of a well's or facility's daily oil output. Higher BPD typically means greater activity levels, more crews on site, and increased service demand. Subcontractors often see scope and call-out frequency tied directly to a client's BPD targets.

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