FieldNews
Subscribe
Industry Glossary Term

DUC (Drilled-but-uncompleted Well)

A well that has been drilled but is awaiting completion work such as fracturing, perforating, or production tie-in. Operators stockpile DUCs when commodity prices are low, then activate them when prices recover. For subcontractors, a large DUC inventory signals upcoming bursts of completion and surface work.

Related Terms

Legacy Site

Industry

An older facility or work location operating on outdated infrastructure, systems, or equipment. Subcontractors often face non-standard conditions, ageing assets, and extra compliance requirements on these sites. Mobilisation and scoping costs can be higher due to undocumented or deteriorated site conditions.

Grid Modernization

Industry

The large-scale upgrading of electrical infrastructure to support smart technologies, renewable integration, and improved reliability. For subcontractors, it drives demand for specialised installation, maintenance, and inspection work. Crews may be deployed on projects ranging from substation upgrades to smart metre rollouts.

Feed Gas

Industry

Raw, unprocessed natural gas delivered to a processing plant or facility as the primary input. For subcontractors, feed gas specifications determine the scope of compression, treating, and handling work on site. Changes in feed gas composition can trigger scope variations and affect your contract terms.

Substrate

Industry

The base material or surface that a coating, lining, or treatment is applied to, such as steel pipe, concrete, or wood. Subcontractors must assess substrate condition before starting surface prep or application work. Poor substrate quality can affect adhesion, warranty, and job acceptance.

Straddle Plant

Industry

A midstream processing facility installed along an existing pipeline to extract natural gas liquids like propane and butane. Subcontractors are frequently mobilised for construction, maintenance, and turnaround work at these sites. Work scopes often include compression, refrigeration, and fractionation system servicing.

Third-Party Contracting

Industry

An arrangement where a primary contractor hires an outside company to perform specialised work on a project. For subcontractors, this defines your position in the contracting chain and affects payment terms, liability, and site access. Knowing your tier level helps clarify who you invoice and who manages your compliance requirements.

Stay sharp on field operations

Industry news and insights, delivered to your inbox.

Subscribe to FieldNews
A community project by Aimsio