Tubulars

The process of pumping produced water or other fluid waste deep into underground formations for disposal. Subcontractors operating injection pumps or wellbore equipment must meet strict provincial and federal disposal regulations. Work often requires specialised well integrity certifications and detailed fluid volume reporting.

Natural gas cooled to -162°C to become liquid for easier transport and storage, creating specialized work opportunities for subcontractors in cryogenic equipment maintenance, pipeline construction, and terminal facilities that require specific safety certifications and cold-weather expertise.

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.

A well drilled in an unproven or lightly tested area to determine whether hydrocarbons are present, often representing shorter-term, high-mobilisation contracts for subcontractors with less predictable follow-on work than development drilling programmes.

Compressed air networks that power pneumatic valves, controls, and instrumentation on oil and gas and industrial sites. Subcontractors must ensure supplied air meets strict dryness and purity standards before connecting equipment. Contaminated or wet instrument air can damage sensitive controls and trigger costly shutdowns.

The complete package of equipment, personnel, and services required to drill a well, which determines the scope of work subcontractors are hired into — whether supplying a single service line or multiple integrated components across the operation.

What Is an AFE in Oil and Gas and How Does It Affect Subcontractor Payments?

An AFE (Authorization for Expenditure) controls every dollar spent on an oilfield project. Learn how it affects your billing, change orders, and cash flow as a subcontractor.