A small-diameter initial hole drilled along a planned path before reaming to full size, commonly used in horizontal directional drilling. Subcontractors use it to verify alignment and ground conditions before committing to the full excavation scope.
Pilot Bore
Related Terms
Curtailment
IndustryA reduction or suspension of oil, gas, or construction operations ordered by the operator or regulator. For subcontractors, curtailment often means standby, demobilisation, or reduced scope with little notice. Review your contract carefully for curtailment clauses that affect payment and mobilisation costs.
WCB (Workers' Compensation Board)
IndustryProvincial agencies in Canada that provide workplace injury insurance. Contractors must maintain WCB coverage and good standing to work on most sites.
Grade Separation
IndustryA crossing where a road, pipeline, or utility passes over or under another route using a bridge or culvert. Subcontractors must account for grade separations when planning equipment moves and material hauls. Permits and escort requirements often apply when loads approach clearance limits.
Secondary Stress
IndustryIndirect mechanical stress that develops in structures or piping due to thermal expansion, settlement, or equipment movement. Unlike primary stress, it isn't caused by direct applied loads. Subcontractors must account for it during installation and inspection to avoid material fatigue and warranty disputes.
Subcontractor
IndustryA company hired by a general contractor or directly by an operator to perform a specific portion of work. Subcontractors often specialize in particular services or trades.
JV (Joint Venture)
IndustryA formal business arrangement where two or more companies partner to pursue a specific project or contract, which can affect subcontractors by changing who issues purchase orders, approves invoices, or holds liability on site. Field service companies should confirm early which JV partner is the contracting entity to avoid payment delays or scope disputes.
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