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IndustryGlossary Term

OCTG (Oil Country Tubular Goods)

Steel pipe products used in drilling, casing, and completing oil and gas wells. Subcontractors handling, transporting, or installing OCTG must follow strict make-up torque and storage specs. Damage or improper handling can trigger costly liability claims against your crew.

Related Terms

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.

Differing Site Conditions

Industry

Unexpected ground, soil, or subsurface conditions that differ materially from what the contract documents described. Subcontractors can use this clause to claim additional compensation or time when surprises drive up costs. Always document and notify the general contractor or owner immediately upon discovery.

Greenfield

Industry

A project built from scratch on a previously undeveloped site, with no existing infrastructure. For subcontractors, this means longer mobilisation timelines and higher early-stage labour demand. Expect more scope changes and stronger opportunities for long-term contract work.

Hookup

Industry

The phase where installed equipment and systems are connected to utilities, instrumentation, and process lines. For subcontractors, hookup work often follows construction and represents a distinct, billable scope. Crews must coordinate closely with commissioning teams to avoid delays.

C3+ Stream

Industry

A natural gas liquid (NGL) mixture containing propane, butane, and heavier hydrocarbons separated during processing. Subcontractors working at gas plants or fractionation facilities will handle, transport, or maintain equipment tied to this product stream. Understanding its composition helps crews follow correct handling, storage, and safety protocols on site.

Pre-Feed (pre-Front End Engineering and Design)

Industry

An early project phase where owners assess technical and commercial feasibility before committing to full design. For subcontractors, it signals potential future scope but rarely includes direct field work. Winning study contracts at this stage can position your company for larger awards later.

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