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IndustryGlossary Term

Ballast

Heavy material (water, sand, or concrete) added to vessels, structures, or equipment to improve stability and balance. In field operations, managing ballast affects load planning, marine logistics, and offshore platform work. Subcontractors on marine or offshore scopes must account for ballast systems in scheduling and safety planning.

Related Terms

Closed-Loop Heat Exchanger

Industry

A sealed system that transfers heat between two fluid circuits without them making direct contact. Subcontractors service these units for cleaning, inspection, and pressure testing. They are common in oilfield facilities, compressor stations, and industrial construction sites.

Capital Program

Industry

A planned set of major construction or infrastructure projects approved by an owner or operator for a defined period. For subcontractors, it signals sustained work volumes and long-term contracting opportunities. Aligning your capacity with a client's capital program can anchor your pipeline for months or years.

Oil-Directed Rig Count

Industry

The number of rigs actively drilling for oil, tracked weekly by services like Baker Hughes. A rising count signals increased demand for field crews, equipment, and well-site services. Subcontractors use it to anticipate work volumes and adjust capacity accordingly.

Call-Out (call-Out Activity)

Industry

A single, unplanned service request dispatched to a subcontractor or field technician outside of scheduled work. Each call-out is typically logged as a discrete billable event. Subcontractors often charge a flat call-out fee plus time and materials.

Transmission Main

Industry

A large-diameter pipeline that moves water, gas, or other fluids over long distances at high pressure. Subcontractors are often hired for installation, inspection, or maintenance work on these lines. Strict pressure ratings and material specs govern all field work.

Tidal-Water Export Terminal

Industry

A coastal or estuary facility where bulk commodities like LNG or crude oil are loaded onto marine vessels for export. Water depth fluctuates with tides, affecting vessel scheduling and your crew's access windows. Subcontractors must plan shifts and equipment mobilisation around tide tables and vessel berthing schedules.

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