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Industry Glossary Term

HRSG (Heat Recovery Steam Generator)

A large boiler unit that captures exhaust heat from gas turbines to produce steam for power generation. Subcontractors are commonly engaged for HRSG installation, maintenance, and inspection scopes. Work typically requires certified welders, boilermakers, and compliance with pressure vessel regulations.

Related Terms

Dual-Fuel System

Industry

An engine or generator that runs on two fuel sources, typically diesel and natural gas, allowing switching based on availability or cost. Common on remote job sites where field crews manage fuel supply logistics. Subcontractors may need certified technicians and specific maintenance protocols to operate this equipment.

Petrophysical Analysis

Industry

The evaluation of reservoir rock and fluid properties using well log data and core samples. Results determine whether a well is worth completing, directly affecting drilling programme scope and subcontractor workload. Field crews support this work through wireline logging, coring, and fluid sampling operations.

Earn-In Agreement

Industry

A deal where a subcontractor gains equity or a stake in a project by completing defined work or spending milestones. Common in junior oil and gas ventures where cash is tight. Your services effectively buy you into the asset rather than just earning a fee.

Long-Span Structural Systems

Industry

Structural frameworks that cover large distances without intermediate supports, such as trusses, arches, or space frames. Subcontractors encounter these in industrial buildings, processing facilities, and modular plant construction. Work in these areas often requires specialised rigging, elevated access planning, and load-path awareness.

Multi-Well Pad

Industry

A single surface location where multiple wells are drilled and completed in sequence. For subcontractors, this means extended site presence, higher mobilisation value, and repeated service cycles from one location. Scheduling and crew continuity are critical to securing ongoing work across the pad.

Leasehold

Industry

Land or mineral rights an operator has legally secured through a lease agreement with the landowner or Crown. Subcontractors typically work within leasehold boundaries, so access, permitting, and site rules are set by the operator holding the lease. Understanding leasehold limits helps crews avoid trespassing on adjacent unlicensed areas.

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