A casing string run inside an existing wellbore to line the productive zone without extending to surface. Subcontractors are often mobilised for liner running, cementing, and pressure testing during completion operations. Work is typically time-sensitive and tied to rig-day rates.
Production Liner
Related Terms
Perforate
IndustryTo 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.
Extended-Reach Completions
IndustryCompletion work performed on wells drilled at extreme horizontal distances from the surface location, sometimes exceeding 3,000 metres laterally. Subcontractors face longer tool-run times, specialised equipment requirements, and increased logistics complexity. Mobilisation planning and crew scheduling must account for extended job durations compared to conventional completions.
MRP (Materials Requirements Planning)
IndustryA scheduling system that calculates what materials are needed, in what quantities, and when. Subcontractors use it to avoid shortages or excess stock on job sites. It ties material orders directly to project timelines and scopes of work.
Equity Partnership (first Nations)
IndustryAn ownership arrangement where a First Nations group holds a financial stake in a project or company. Subcontractors may be required to include an equity partner to win work on certain corridors or project areas. This affects bidding structure, profit-sharing, and how contracts are awarded.
Greenfield
IndustryA project built from scratch on a previously undeveloped site, with no existing infrastructure. For subcontractors, this means longer mobilisation timelines and higher early-stage labour demand. Expect more scope changes and stronger opportunities for long-term contract work.
BOPD (Barrels of Oil Per Day)
IndustryA measure of a well's or facility's daily oil production output. Operators use BOPD targets to schedule field service work, so higher rates often mean more frequent maintenance contracts and crew rotations. Subcontractors may see BOPD thresholds written into service agreements to trigger additional scope.
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