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IndustryGlossary Term

Gyroscopic Guidance

A downhole navigation system that uses gyroscopes to track drill bit position and direction without magnetic interference. Subcontractors use it in areas where magnetic tools fail, such as near casing or in high-latitude regions. Accurate wellbore placement reduces costly corrections and keeps projects on schedule.

Related Terms

Heat Tracing

Industry

A system of electric cables or steam lines wrapped around pipes to prevent freezing or maintain process temperatures. Subcontractors are often hired to install, inspect, and commission these systems during turnarounds or new construction. Common in cold-climate facilities handling water lines, instrumentation, and process piping.

Ngl (natural Gas Liquids) Value Chain

Industry

The full sequence of extracting, processing, transporting, and selling natural gas liquids such as propane, butane, and ethane. Subcontractors work across multiple stages, including plant turnarounds, pipeline installation, and fractionation facility maintenance. Activity levels and contract demand shift depending on which part of the chain is seeing investment.

ABC (Associated Builders and Contractors)

Industry

A U.S. trade association representing merit-shop contractors in construction and industrial sectors. Subcontractors use ABC membership for training resources, safety programmes, and industry networking. Membership can also signal credibility when bidding on open-shop projects.

Candu (canadian Deuterium Uranium) Reactor

Industry

A Canadian-designed nuclear reactor that uses heavy water as a moderator and coolant. Subcontractors working on maintenance or upgrades face strict nuclear regulatory compliance and specialised certification requirements. Expect rigorous site access controls, radiation safety training, and detailed documentation standards.

PPA (Power Purchase Agreement)

Industry

A long-term contract where a buyer agrees to purchase electricity from a generator at a fixed price. For subcontractors, PPAs on large sites can affect whether temporary or permanent power infrastructure is in scope. Understanding site power arrangements helps clarify mobilisation costs and equipment requirements.

Long-Lead Equipment

Industry

Specialised equipment requiring extended manufacturing or procurement timelines, often months or years. Subcontractors must align mobilisation schedules and contracts around delivery dates. Delays to long-lead items frequently cascade into project deferrals and standby costs.

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