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IndustryGlossary Term

OFS (Oilfield Field Services)

The sector of companies and subcontractors that provide specialised labour, equipment, and technical services to oil and gas operators. This includes drilling, completions, maintenance, and production support work. Most field subcontractors operate within the OFS sector, working under Tier 1 service companies or directly for operators.

Related Terms

Pump Station

Industry

A facility that moves oil, gas, or water through a pipeline using mechanical pumps. Subcontractors are frequently mobilised to pump stations for maintenance, inspection, and equipment servicing work. These sites often require specific safety certifications and site orientations before work begins.

Gas Basin

Industry

A large underground region containing significant natural gas reserves, typically supporting multiple wells and facilities. For subcontractors, basins define key work corridors where long-term service demand is concentrated. Knowing active basins helps crews and companies target mobilisation and contract opportunities.

Pad Drilling

Industry

A method where multiple wells are drilled from a single surface location, or pad. For subcontractors, this means sustained, back-to-back work cycles with minimal rig-up and tear-down time. Efficient mobilisation and crew scheduling are critical to maintaining productivity across the pad.

Schedule Compression

Industry

When a project owner shortens the original timeline without reducing scope. Subcontractors must mobilise more crew, run shifts, or overlap tasks to meet the new dates. This often triggers overtime costs and equipment conflicts that may not be covered under the original contract.

Spar Platform

Industry

A floating offshore structure anchored by a deep vertical cylinder, used in deepwater oil and gas production. Subcontractors access it by crew boat or helicopter for maintenance, inspection, and equipment services. Mobilisation costs and offshore scheduling are key considerations when bidding work on spars.

Wellbore Cleanout

Industry

A downhole operation to remove debris, scale, cement, or fill from inside a wellbore. Subcontractors typically provide coiled tubing, fluid pumping, or snubbing crews for this work. Scope can expand quickly, so confirm day-rate terms and standby provisions before mobilising.

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