Sequencing (construction)

A scheduled out-of-water inspection and refit that extends a vessel's certified operational life beyond its original design limit. For subcontractors, it signals a concentrated burst of multi-trade work including hull repairs, coating, and systems upgrades. Scopes are often fast-tracked, creating strong short-term demand for specialised labour and materials.

A formal document a subcontractor submits to a prime contractor or operator to express intent to bid on upcoming work. It is not a binding commitment, but helps secure a spot in the tender process. Common in pre-qualification stages for large oilfield or construction scopes.

Offshore and nearshore infrastructure work including platform installation, subsea pipelines, and dock or jetty builds. Subcontractors often face strict vessel access requirements and marine safety certifications. Mobilisation costs and weather delays are major contract risk factors.

A project with permits, funding, and engineering approved, allowing field work to begin immediately. For subcontractors, it signals that mobilisation and contract awards are imminent. Pursuing shovel-ready work reduces the risk of scoping delays eating into your margins.

A volume measurement equal to one acre of surface area filled one foot deep, roughly 1,233 cubic metres. Common in water management contracts for tailings ponds, frac water storage, and site remediation. Subcontractors may be scoped and billed based on acre-feet of material moved or treated.

A wellbore that is not currently producing or being actively operated, but has not been formally abandoned. Subcontractors may be hired for monitoring, maintenance, or eventual reclamation work on these sites. Regulatory requirements around inactive wells vary by province and can affect scope and timeline.

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An AFE (Authorization for Expenditure) controls every dollar spent on an oilfield project. Learn how it affects your billing, change orders, and cash flow as a subcontractor.