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IndustryGlossary Term

Well Plugging

The process of permanently sealing a wellbore with cement or mechanical barriers to prevent fluid migration. Subcontractors are often engaged for specialised plugging and abandonment (P&A) scopes. Demand for this work is steady as regulators push operators to remediate inactive wells.

Related Terms

Rigging

Industry

The equipment and techniques used to lift, secure, and move heavy loads on a job site. Subcontractors must ensure all rigging gear is certified and operators are ticketed. Improper rigging is a leading cause of serious incidents and contract liability.

T&D (Transmission and Distribution)

Industry

The network of high-voltage power lines, towers, substations, and local distribution lines that move electricity from generators to end users. Subcontractors in this sector handle tasks like line construction, pole installation, and substation work. T&D projects are often awarded through utility frameworks or provincial grid operators.

Heads of Agreement (hoa)

Industry

A preliminary document outlining the key commercial terms agreed between parties before a formal contract is finalised. For subcontractors, it signals serious intent but is not always legally binding. Avoid mobilising crews or purchasing materials based solely on an HoA.

Brownfield Site

Industry

An existing facility or infrastructure that is being modified, expanded, or recommissioned rather than built from scratch. Subcontractors should expect tighter work windows, live-equipment hazards, and strict permit-to-work requirements. Scheduling and coordination with ongoing operations are critical on brownfield projects.

Closed-Loop Cooling

Industry

A system that recirculates coolant through equipment without discharging it to the environment. Subcontractors must maintain leak-free connections and monitor fluid levels during installation and servicing. Improper handling can trigger environmental compliance violations on site.

Lean Construction

Industry

A project delivery approach that eliminates wasted time, materials, and labour on job sites. Subcontractors use lean methods to tighten scheduling, reduce idle crew time, and improve handoffs between trades. It often involves short-interval planning tools like the Last Planner System.

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