A urea-based solution injected into diesel exhaust systems to reduce harmful emissions on Tier 4 equipment. Subcontractors must keep adequate DEF on-site, as running out triggers engine derate or shutdown. Factor DEF supply and storage into your remote site logistics planning.
DEF (Diesel Exhaust Fluid)
Related Terms
SRP (Sucker Rod Pump)
IndustryA downhole artificial lift system that uses surface-driven rods to pump oil from low-pressure wells. Subcontractors are frequently called in for rod pulling, pump teardowns, and wellsite servicing work. Reliable SRP maintenance contracts can provide steady, recurring revenue for oilfield service companies.
Production Chemistries
IndustrySpecialty chemicals injected into wells and pipelines to control corrosion, scale, paraffin, and hydrates during oil and gas production. Subcontractors handle storage, injection system maintenance, and chemical dosing as part of production operations contracts. Proper handling certifications and spill containment protocols are typically required on-site.
Sanctioned Project
IndustryA project that has received formal capital approval from an operator or owner company and is cleared to proceed. For subcontractors, sanction signals that contracts, purchase orders, and mobilisation timelines are imminent. It marks the point where bidding activity converts into confirmed field work.
Appraisal Drilling
IndustryDrilling program that follows an initial discovery to confirm reservoir size and commercial viability. For subcontractors, it means short-term, high-intensity scopes between exploration and full development phases. Mobilisation windows can be tight and contract durations unpredictable.
Bakken Play
IndustryA major tight-oil producing region spanning North Dakota, Montana, and southern Saskatchewan and Manitoba. Subcontractors working here should expect high-volume horizontal drilling and multi-stage fracturing scopes. Seasonal road bans and remote logistics significantly impact crew mobilisation and equipment scheduling.
Midstream
IndustryThe segment of the oil and gas industry involved in processing, storing, and transporting oil, gas, and NGLs. Includes pipelines, gathering systems, and processing plants.
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