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Industry Glossary Term

Rig Release

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.

Related Terms

Modular Construction

Industry

A build method where structures are assembled from prefabricated units manufactured offsite, then transported and installed on location. Subcontractors are often scoped for site prep, mechanical tie-ins, or installation crews rather than full builds. Work tends to come in concentrated, short-duration packages tied to delivery schedules.

DUC (Drilled-but-uncompleted Well)

Industry

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.

Exploration Well

Industry

A well drilled in an unproven or lightly tested area to determine whether hydrocarbons are present, often representing shorter-term, high-mobilisation contracts for subcontractors with less predictable follow-on work than development drilling programmes.

Tubulars

Industry

Steel pipes used in drilling and well construction, including casing, tubing, and drill pipe. Subcontractors handling tubulars must follow strict inspection and handling procedures. Damage during your scope can result in costly liability claims.

Field Ticket

Industry

A document created in the field that records work performed, equipment used, materials consumed, and time spent. Field tickets are the basis for invoicing and must typically be approved by the customer before payment.

Perforate

Industry

To create precisely spaced holes or openings in oil well casing and cement at a target formation depth, allowing hydrocarbons to flow into the wellbore; subcontractors providing perforating services typically work under wireline or coiled tubing crews and must coordinate closely with the operator's completion schedule.

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