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IndustryGlossary Term

MWD (Measurement While Drilling)

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.

Related Terms

Decommissioning

Industry

The process of safely shutting down and dismantling oil and gas infrastructure at end-of-life. For subcontractors, it generates significant work in removal, remediation, and site restoration. Scopes often include demolition, equipment salvage, and regulatory closeout tasks.

Building Electrification

Industry

The process of replacing fossil fuel-based systems in buildings with electric alternatives, such as heat pumps and induction equipment. For subcontractors, it drives demand for electrical, HVAC, and mechanical retrofits. Crews must often hold updated certifications to work on high-voltage systems and EV (Electric Vehicle) charging infrastructure.

Balance-Of-Plant

Industry

All supporting systems and infrastructure outside the primary process equipment, such as electrical, piping, HVAC, and civil works. For subcontractors, BOP (Balance-of-Plant) scope often represents the bulk of awarded field labour. Knowing what falls under BOP helps avoid scope gaps and missed bid items.

HDPE (High-density Polyethylene)

Industry

A durable, corrosion-resistant plastic used for pipes, containment liners, and fluid transfer systems on job sites. Subcontractors commonly install or tie into HDPE pipelines in water, gas distribution, and environmental remediation scopes. Its lightweight nature reduces handling costs but requires certified fusion welding for pressure-rated connections.

Best-Value Selection

Industry

A contractor award method where clients evaluate price alongside factors like safety record, experience, and equipment quality. Subcontractors are not automatically disqualified for submitting the lowest bid. Demonstrating strong credentials and reliability can outweigh a competitor's cheaper rate.

Minimum Wall Thickness

Industry

The lowest acceptable pipe or vessel wall thickness before the component must be repaired or replaced. Subcontractors performing inspection or maintenance work must verify measurements meet this threshold. Falling below it triggers mandatory remediation and can halt operations until resolved.

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