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IndustryGlossary Term

Instrumentation Upgrades

Replacement or modernisation of sensors, transmitters, and control devices on existing facilities. For subcontractors, this work is often scoped as short-duration projects requiring certified instrumentation technicians. Tight commissioning deadlines and client-supplied materials are common on these jobs.

Related Terms

Sitework

Industry

Preparatory ground-level work completed before main construction begins, including grading, excavation, and utility rough-ins. Subcontractors are often scoped for sitework as a standalone package. Delays in sitework directly impact downstream trade access and schedule.

Perforate

Industry

To create precisely spaced holes or openings in oil well casing and cement at a target formation depth, allowing hydrocarbons to flow into the wellbore; subcontractors providing perforating services typically work under wireline or coiled tubing crews and must coordinate closely with the operator's completion schedule.

Diverging Diamond Interchange

Industry

A road interchange design where traffic briefly crosses to the opposite side of the road between two intersections. Subcontractors hauling heavy equipment or oversized loads must account for altered lane patterns and potential permit route restrictions. Plan site access carefully, as DDI layouts can complicate convoy movements and GPS routing.

Design-Build

Industry

A 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.

HDD (Horizontal Directional Drilling)

Industry

A trenchless method used to install pipelines, conduits, or cables beneath obstacles like roads, rivers, or existing infrastructure. Subcontractors are typically engaged for the drill crew, mud mixing, and equipment operation. Scopes are highly specialised and often require certified operators and dedicated HDD spreads.

Feedstock

Industry

Raw material fed into a processing facility, such as crude oil, bitumen, or natural gas. Subcontractors often support feedstock handling through pipeline work, tank maintenance, and material transfer operations.

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