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Industry Glossary Term

Processing Train

A series of vessels and equipment that separates wellhead fluids into oil, gas, and water. Subcontractors are often scoped to one train at a time, so know which train your work order covers. Shutdowns or upsets on your train can directly affect your crew's schedule and completion milestones.

Related Terms

Scoping Period

Industry

A defined window where the prime contractor or operator outlines project requirements before awarding contracts. Subcontractors use this time to assess fit, prepare bids, and flag resource or equipment needs. Missing this window often means missing the contract opportunity entirely.

NOC (National Oil Company)

Industry

A state-owned oil producer that controls exploration and production within its country. NOCs often require local content compliance, affecting subcontractor hiring and procurement. Payment cycles and approval chains can be longer than with private operators.

MWD (Measurement While Drilling)

Industry

A real-time data acquisition process used during directional drilling that transmits downhole measurements — such as wellbore trajectory, formation data, and tool orientation — to surface crews without interrupting operations. For subcontractors, MWD services represent a specialised scope of work requiring certified technicians and dedicated equipment, often billed as a separate line item on drilling contracts.

Class 8 Truck

Industry

The heaviest commercial truck classification, with a gross vehicle weight rating over 33,000 lbs. Includes semi-trucks, tankers, and heavy haulers commonly used to move equipment and materials on job sites. Operators require a Class 1 commercial driver's licence in Canada.

Predictive Maintenance

Industry

A maintenance approach that uses equipment data and monitoring to forecast failures before they occur. Subcontractors may be dispatched for targeted repairs based on sensor alerts rather than fixed schedules. This reduces emergency callouts and helps crews plan mobilisation more efficiently.

Tieback

Industry

A structural anchor or connection point used to secure equipment, pipelines, or wellheads back to an existing infrastructure system, commonly referenced in subcontractor scopes of work when connecting new installations to live or existing lines. Subcontractors should confirm tieback specifications and isolation procedures clearly in their contracts, as this work often involves elevated risk and may require additional certifications or permits.

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