Cavern Storage

The percentage of a refinery's total processing capacity actively in use at a given time. Higher utilisation rates signal increased demand for maintenance, turnaround, and inspection crews. Subcontractors can use this metric to anticipate workload surges and mobilisation timelines.

The horizontal section of a directionally drilled well, extending sideways through the target formation. Laterals can stretch several kilometres, requiring extended crew mobilisations and staged service scopes. Subcontractors should clarify lateral length upfront, as it directly affects equipment needs and job duration.

When operators strictly control spending and delay or cancel projects to protect their balance sheets. For subcontractors, this means fewer awarded contracts, reduced scopes, and tighter bid competition. Expect slower mobilisation timelines and more rigorous cost justification from clients.

The process of moving equipment and personnel to a job site (mobilization) and returning them afterward (demobilization). Often billed as separate line items.

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.

Steel pipes used in drilling and well construction, including casing, tubing, and drill pipe. Subcontractors handling tubulars must follow strict inspection and handling procedures. Damage during your scope can result in costly liability claims.

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.