A vertical guide structure on a pile-driving or drilling rig that keeps the drill string or pile aligned during penetration. Subcontractors working near this equipment must follow strict exclusion zone protocols. It is also called a mast or leads on some rigs.
Leader (drilling Rig)
Related Terms
Voluntary Cuts
IndustryAgreed reductions in oil production by member nations, typically OPEC (Organization of the Petroleum Exporting Countries) members, to stabilise prices. For subcontractors, these cuts often trigger project deferrals, reduced scope, and slower mobilisation schedules. Budget freezes from operators frequently follow, directly impacting field service award timelines.
Class 8
IndustryThe heaviest category of commercial trucks, rated at over 33,001 lbs gross vehicle weight. Common in oil and gas field work for hauling heavy equipment, frac sand, and pipe. Operators require a Class 1 licence in Canada.
Ip120 (initial Production 120-Day Rate)
IndustryThe average daily production output of a new well over its first 120 days. Operators use this benchmark to schedule and extend field service contracts. Strong IP120 results often trigger follow-on work for completions and production crews.
Lower 48
IndustryRefers to the contiguous United States, excluding Alaska and Hawaii. For subcontractors, it defines a common work jurisdiction with distinct regulatory, tax, and labour rules from Canadian or Alaskan operations. Mobilisation costs and compliance requirements differ significantly when crews cross into or out of this region.
Infrared Thermography
IndustryA non-destructive inspection method using thermal imaging cameras to detect heat anomalies in electrical systems, pipelines, and mechanical equipment. Subcontractors use it to identify failing components before breakdowns occur. Many clients require certified IR (Infrared) thermography reports as part of preventive maintenance scopes.
Trenchless Technology
IndustryMethods for installing or repairing underground pipelines and conduits without open-cut excavation. Common techniques include HDD (Horizontal Directional Drilling) and pipe bursting. Subcontractors specialising in these methods often command premium rates due to reduced surface disruption and specialised equipment requirements.
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Promoting your best hand to foreman is one of the most important decisions a subcontractor makes. Get it wrong and you lose two people: a skilled producer and a failed supervisor. This guide covers how to identify the right candidates, make the transition, and build a leadership pipeline that does not gut your field capacity.
Industry GuideHow Operator Mergers and Acquisitions Affect Your Subcontract Agreements
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