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IndustryGlossary Term

Corrective Maintenance

Repair work performed after equipment has already failed or broken down. For subcontractors, it often means urgent mobilisation and unplanned labour costs. Scope can expand quickly, so clear change-order procedures are essential.

Related Terms

Refinery Throughput

Industry

The volume of crude oil a refinery processes over a set period, typically measured in barrels per day. Higher throughput means more maintenance, turnaround, and inspection work for subcontractors. Expect busier scopes and tighter schedules when a client ramps up processing capacity.

WCSB (Western Canadian Sedimentary Basin)

Industry

A vast sedimentary basin spanning BC, Alberta, Saskatchewan, and Manitoba that hosts Canada's largest oil and gas reserves. It is the primary operating region for most Canadian upstream field service subcontractors. Work here includes conventional drilling, oil sands operations, and pipeline construction.

In-Service Date

Industry

The date when equipment or a facility is officially commissioned and begins active operation. For subcontractors, this date often triggers billing milestones, warranty periods, or contract close-out requirements. Missing this date can result in penalties or delayed final payment.

Prospective Interval

Industry

A rock formation believed to contain oil or gas, targeted for drilling or evaluation. Subcontractors are often mobilised to support exploration work within these zones. Scope and duration of field service contracts may depend on how many prospective intervals a well will test.

FEED (Front-end Engineering Design)

Industry

The detailed engineering phase before a project is sanctioned for full construction. For subcontractors, FEED signals that scopes, specs, and vendor lists are being finalised. Winning work during FEED often positions your company for contracts in the execution phase.

Coal Bed Methane

Industry

CBM (Coal Bed Methane) is natural gas extracted from coal seams rather than conventional reservoirs. Field crews typically handle dewatering operations, pipeline tie-ins, and wellsite maintenance on CBM projects. Work is often spread across large numbers of shallow, closely spaced wells requiring frequent travel between sites.

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