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Industry Glossary Term

Vacuum Excavation

A non-destructive digging method that uses high-pressure water or air to loosen soil, then suctions the debris into a holding tank. Commonly used for safe excavation around buried utilities, pipelines, and underground infrastructure. Subcontractors are often hired for this work during tie-ins, facility upgrades, or pre-dig utility locates.

Related Terms

CPF (Central Processing Facility)

Industry

A fixed surface facility where oil, gas, and water from multiple wells are separated, treated, and prepared for transport or sale. For subcontractors, a CPF is often a long-term, high-activity work site requiring trades, maintenance, and operations crews. Scope can include initial construction, commissioning, turnarounds, and ongoing maintenance contracts.

PAUT (Phased Array Ultrasonic Testing)

Industry

An advanced non-destructive testing method that uses multiple ultrasonic beams to inspect welds, pipelines, and structural components for defects. It produces detailed cross-sectional images without cutting or damaging the material. Subcontractors offering PAUT services typically require certified Level II or III technicians and specialised portable equipment.

Laser Surface Ablation

Industry

A surface preparation method using focused laser energy to remove rust, coatings, or contaminants from metal. Subcontractors use it as a cleaner alternative to sandblasting on pipelines and structural steel. It reduces waste disposal costs and meets strict environmental site requirements.

Lower-Tier Subcontractor

Industry

A company or sole operator hired by a subcontractor, rather than directly by the prime contractor or owner. Lower-tier subs often face delayed payment cycles and reduced contract visibility. Understanding your tier position affects lien rights, insurance requirements, and invoice routing.

Rotary Rig Count

Industry

A weekly tally of active drilling rigs operating across a region, published by companies like Baker Hughes. Subcontractors use it to gauge market demand and anticipate work volumes. A rising count typically signals increased opportunities for drilling-related field services.

Gathering Infrastructure

Industry

The network of pipelines, compressors, and processing facilities that collect hydrocarbons from wellheads and move them to processing or transmission points. For subcontractors, it represents a major source of construction, maintenance, and inspection work. Projects often run concurrently with drilling programmes, creating tight scheduling demands.

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