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IndustryGlossary Term

SAGD (Steam Assisted Gravity Drainage)

A heavy oil extraction method using paired horizontal wells where steam is injected into the upper well to heat bitumen, allowing it to drain by gravity to the lower production well. Creates specialized maintenance and service opportunities for subcontractors in steam generation equipment, wellhead systems, and pipeline infrastructure at oil sands operations.

Related Terms

Preconstruction

Industry

The planning phase before field work begins, covering scope review, site assessments, and schedule alignment with the GC. Subcontractors are often engaged during this phase to provide pricing, labour forecasts, and constructability input. Early involvement can improve mobilisation timelines and reduce costly scope changes later.

Call for Participation

Industry

A formal notice from an operator or prime contractor inviting subcontractors to express interest in an upcoming project or contract. It typically outlines scope, required certifications, and submission deadlines. Responding early can improve your chances of being shortlisted for the work.

Subsea Fibre

Industry

Fibre optic cable installed on the seabed to transmit data between offshore assets and onshore facilities. Subcontractors install, inspect, and repair these systems using specialised vessels and ROVs. Work often involves strict documentation and offshore certification requirements.

Differing Site Conditions

Industry

Unexpected ground, soil, or subsurface conditions that differ materially from what the contract documents described. Subcontractors can use this clause to claim additional compensation or time when surprises drive up costs. Always document and notify the general contractor or owner immediately upon discovery.

Epc (engineering, Procurement, and Construction) Contractor

Industry

A company hired to deliver a project from design through build, acting as the main contractor above subcontractors. As a subcontractor, your client and contract holder is typically the EPC, not the asset owner. They control scope, scheduling, and invoice approval on site.

Frontage Road

Industry

A secondary road running parallel to a highway, providing access to adjacent worksites, lease roads, or staging areas. Subcontractors often use frontage roads for heavy equipment moves or crew dispatch without entering main traffic. Confirm load restrictions and municipal permits before routing oversized hauls.

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