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IndustryGlossary Term

BHA (Bottom Hole Assembly)

The collection of drilling tools and equipment at the bottom of the drill string, including the drill bit, drill collars, stabilizers, and downhole motors. For drilling subcontractors, BHA configuration directly impacts drilling performance, tool wear rates, and operational efficiency.

Related Terms

Strait of Hormuz

Industry

A critical shipping chokepoint between Oman and Iran controlling roughly 20% of global oil flow. Disruptions here can spike material costs and delay equipment deliveries for subcontractors. Budget contingencies and procurement timelines should account for geopolitical risk in this corridor.

Antifriction Bearing

Industry

A bearing that uses rolling elements — balls or rollers — to reduce friction between moving parts. Common in pumps, motors, and rotating equipment on job sites. Subcontractors should inspect and replace these during scheduled maintenance to avoid unplanned downtime.

Solar-Plus-Storage

Industry

A power system pairing solar panels with on-site batteries to supply electricity at remote job sites. Subcontractors may install, maintain, or work alongside these systems instead of diesel generators. Familiarity with this equipment is increasingly expected on off-grid oil and gas and construction sites.

Inactive Well

Industry

A wellbore that is not currently producing or being actively operated, but has not been formally abandoned. Subcontractors may be hired for monitoring, maintenance, or eventual reclamation work on these sites. Regulatory requirements around inactive wells vary by province and can affect scope and timeline.

Megafab

Industry

A large-scale modular fabrication project where major facility components are built offsite and shipped for final assembly. For subcontractors, megafabs mean long-duration scopes, high crew volumes, and complex multi-trade coordination. Scheduling and mobilisation demands are typically intense.

Standalone Bess (battery Energy Storage System)

Industry

A self-contained energy storage unit that operates independently of the grid or a generator. Subcontractors deploy these on remote sites to power equipment and temporary facilities. They reduce fuel costs and generator runtime, which can affect site energy billing structures.

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