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Industry Glossary Term

ROP (Rate of Penetration)

ROP measures how fast a drill bit advances through rock, usually in metres per hour. Subcontractors use it to estimate job duration and crew scheduling. Faster ROP can mean shorter contracts but higher equipment wear costs.

Related Terms

Deferred Maintenance

Industry

Upkeep or repair work that has been postponed by an asset owner due to budget constraints or scheduling conflicts. For subcontractors, deferred maintenance often triggers urgent, high-volume scopes when work is finally released. Expect compressed timelines, ageing equipment, and increased safety hazards on these jobs.

Walkover System

Industry

A above-ground tracking system used in horizontal directional drilling (HDD) to monitor and guide a drill head's position underground. A handheld receiver walks the surface above the drill path, reading signals from a transmitter in the drill head. Subcontractors use this data to steer accurately and document bore paths for client sign-off.

Rig Utilization

Industry

The percentage of time a rig is actively working versus sitting idle. For subcontractors, high rig utilisation means steady billable hours and predictable revenue. Low utilisation signals contract gaps that strain cash flow and crew retention.

SPR (Strategic Petroleum Reserve)

Industry

A government-held emergency stockpile of crude oil that, when released or replenished, can trigger short-term surges in drilling, transportation, and maintenance contracts as operators respond to shifting supply directives. Field service companies should monitor SPR activity as an indicator of near-term work mobilisation and pricing conditions in their region.

Legacy Site

Industry

An older facility or work location operating on outdated infrastructure, systems, or equipment. Subcontractors often face non-standard conditions, ageing assets, and extra compliance requirements on these sites. Mobilisation and scoping costs can be higher due to undocumented or deteriorated site conditions.

Export Terminal

Industry

A facility where oil, gas, or LNG is transferred from pipelines or storage for shipment to buyers. Subcontractors are often mobilised here for maintenance, inspection, and commissioning work. Security clearances and site-specific safety certifications are typically required.

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