FieldNews
Subscribe

Daily oil & gas and construction news for subcontractors

Industry Glossary Term

Below-Grade

Any work or structure located below the finished ground surface, such as buried pipelines, foundations, or conduits. Subcontractors must account for added costs like shoring, dewatering, and confined space compliance. Scope changes below-grade often trigger change orders due to unforeseen soil or utility conditions.

Related Terms

Shale Basin

Industry

A large geographic region containing shale rock formations targeted for oil and gas extraction through horizontal drilling and hydraulic fracturing. For subcontractors, shale basins like the Montney or Duvernay represent high-volume, multi-year work corridors. Expect cyclical demand, remote mobilisation, and repeat frac and completions contracts.

Epc (engineering, Procurement, and Construction) Contractor

Industry

A company hired to deliver a project from design through build, acting as the main contractor above subcontractors. As a subcontractor, your client and contract holder is typically the EPC, not the asset owner. They control scope, scheduling, and invoice approval on site.

Stock Hole

Industry

A pre-drilled or existing borehole kept in reserve for future use on a wellsite. Subcontractors may be mobilised to maintain or re-enter stock holes with little advance notice. Knowing a site has stock holes helps crews plan equipment and standby requirements.

Integrity Management

Industry

A structured programme for inspecting, maintaining, and documenting assets to ensure they remain safe and operational. Subcontractors are often hired to perform integrity work such as corrosion inspection, NDT, and pipeline assessments. Accurate recordkeeping is critical, as clients and regulators require full audit trails.

HDPE (High-density Polyethylene)

Industry

A durable, corrosion-resistant plastic used for pipes, containment liners, and fluid transfer systems on job sites. Subcontractors commonly install or tie into HDPE pipelines in water, gas distribution, and environmental remediation scopes. Its lightweight nature reduces handling costs but requires certified fusion welding for pressure-rated connections.

Gas Sales Precedent Agreement

Industry

A conditional agreement between a producer and gas buyer that must be satisfied before a project moves to full development. For subcontractors, it signals that major field mobilisation and long-term work commitments depend on this deal closing. Delays or failed negotiations can stall contracts, procurement, and crew deployment.

Stay sharp on field operations

Industry news and insights, delivered to your inbox.

Subscribe to FieldNews
A community project by Aimsio