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IndustryGlossary Term

Pipeline Integrity

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.

Related Terms

Tidewater Access

Industry

The ability to move equipment or materials directly via navigable waterways to a project site. For subcontractors, it affects logistics planning, mobilisation costs, and marine transport requirements. Sites with tidewater access often allow heavier loads that road or rail cannot support.

Secondary Stress

Industry

Indirect mechanical stress that develops in structures or piping due to thermal expansion, settlement, or equipment movement. Unlike primary stress, it isn't caused by direct applied loads. Subcontractors must account for it during installation and inspection to avoid material fatigue and warranty disputes.

Hydraulic Fracturing

Industry

A well stimulation process where fluid is pumped at high pressure to crack subsurface rock and release oil or gas. Subcontractors are commonly engaged for pump operations, fluid handling, and equipment transport during frac campaigns. Work is often fast-paced and shift-intensive, with strict site access and safety requirements.

Rig Release

Industry

The formal point when a drilling rig is demobilised and the operator ends the rig contract. For subcontractors, it signals the close of associated scopes of work and triggers final invoicing. Crew demob, equipment retrieval, and close-out documentation should begin immediately.

Shale Gas

Industry

Natural gas extracted from shale rock formations using hydraulic fracturing and horizontal drilling. For subcontractors, shale gas projects drive high demand for frac crews, equipment operators, and site services. Work is often concentrated in multi-well pad campaigns, creating steady but intense mobilisation cycles.

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.

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