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Industry Glossary Term

Corrective Maintenance

Repair work performed after equipment has already failed or broken down. For subcontractors, it often means urgent mobilisation and unplanned labour costs. Scope can expand quickly, so clear change-order procedures are essential.

Related Terms

Opec+ (organisation of the Petroleum Exporting Countries Plus)

Industry

An alliance of oil-producing nations that controls global crude output levels. Their production decisions directly affect upstream activity and subcontractor demand. When OPEC+ cuts output, drilling and field service work typically slows; increases often trigger new project mobilisations.

Production Liner

Industry

A casing string run inside an existing wellbore to line the productive zone without extending to surface. Subcontractors are often mobilised for liner running, cementing, and pressure testing during completion operations. Work is typically time-sensitive and tied to rig-day rates.

Bentonite

Industry

A natural clay mineral used in drilling fluids to stabilise boreholes and suspend drill cuttings. Subcontractors handling bentonite slurry must follow site-specific mixing and disposal procedures. Improper handling can trigger environmental compliance issues and project delays.

Pneumatics

Industry

Systems that use compressed air or gas to power tools, actuators, and control valves on job sites. Subcontractors working with pneumatic equipment must ensure proper pressure ratings and fittings are maintained. Common in instrumentation, pipeline, and heavy construction scopes.

ISNetworld

Industry

A contractor management platform used by operators to verify that subcontractors meet safety, insurance, and compliance requirements before being allowed to work on sites. Maintaining ISNetworld compliance is essential for subcontractors working with major operators.

Sealed Bid

Industry

A confidential tender submission where subcontractors submit pricing without knowing competitors' rates. All bids are opened simultaneously by the hiring company. This process is common in public sector and large operator contracts across oil and gas and construction.

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