ISNetworld

A safety and compliance management system used by some operators to pre-qualify and manage contractors working on their sites.

The company that holds the rights to develop an oil and gas property and manages day-to-day operations. Operators hire subcontractors and service companies to perform various tasks.

The straight-line vertical distance from surface to a specific point in a wellbore, regardless of how the well is drilled — subcontractors working on directional or horizontal wells need to reference TVD (not measured depth) when scoping equipment reach, calculating hydrostatic pressures, or verifying work zone depths on service orders.

A project delivery model where one main contractor handles all phases from design to completion, typically creating multiple subcontracting opportunities for field service companies across different project phases. For subcontractors, EPC projects often mean working under a prime contractor who coordinates all trades and manages the overall timeline and specifications.

A standardised unit of energy measurement that converts different types of oil and gas production into equivalent barrels of crude oil, used by operators to report total production volumes when determining project scope and service requirements for subcontractors.

Exploration activity conducted in remote, undeveloped, or previously unworked regions where subcontractors can expect longer mobilisation lead times, higher logistical costs, and limited access to local supply chains or support infrastructure.