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Industry Glossary Term

Valve Leak

A valve leak occurs when a valve fails to fully seal, allowing unintended fluid or gas flow. For subcontractors, it often triggers emergency callouts, inspection holds, or scope additions. Document all findings carefully to support change order billing.

Related Terms

Capital Maintenance Agreement

Industry

A long-term contract where a subcontractor provides scheduled upkeep and repairs on a client's major assets or facilities. Work scopes, pricing, and mobilisation terms are typically locked in advance. These agreements offer subcontractors predictable revenue but may limit flexibility to take on other work.

DRA (Drag-reducing Agent)

Industry

A chemical additive injected into pipelines to reduce turbulence and increase flow rates without adding compression. Subcontractors handling pipeline operations or chemical injection work may be scoped to install, maintain, or monitor DRA injection skids. Understanding DRA systems helps crews execute chemical handling tasks safely and meet operator flow assurance targets.

Reactivation

Industry

The process of bringing a dormant well, pipeline, or piece of equipment back into active service, often requiring subcontractors to mobilise crews, conduct inspections, and complete compliance checks before full operations can resume. For field service companies, reactivation work can represent a significant surge in contract opportunities, particularly during periods of rising commodity prices.

Pipeline Integrity

Industry

The ongoing process of ensuring pipelines remain safe, structurally sound, and compliant with regulatory standards. Subcontractors are frequently hired for inspection, maintenance, and repair work tied to integrity programmes. Scopes can include ILI (Inline Inspection), coating repairs, hydrotesting, and fitness-for-service assessments.

Tubular Running

Industry

The process of installing pipe, casing, or tubing strings into a wellbore during drilling or completion operations. Subcontractors providing tubular running services supply specialised crews and equipment such as power tongs and elevators. Accurate job scoping is critical, as rig time is costly and delays directly affect invoicing and contract performance.

Clastic Reservoir

Industry

A rock formation made of compacted sediment fragments — like sandstone or conglomerate — that holds oil or gas. Most drilling and completions work in Western Canada targets clastic reservoirs. Knowing the formation type helps crews anticipate ground conditions and equipment requirements.

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