Tie-In

A temporary heating system using fluid-filled coils laid on the ground to thaw frozen soil or maintain process temperatures. Subcontractors are often hired to install, monitor, and remove these systems during cold-weather operations. Common in northern pipeline and facility projects where ground conditions affect construction timelines.

Work performed on-site without removing equipment or materials from their installed position. Subcontractors are often mobilised specifically for in-situ repairs, inspections, or testing. Scope and billing should clearly reflect the fixed work location.

A designated location where materials, parts, or equipment are staged for quick deployment to active job sites. Subcontractors often draw inventory from a client's stockpoint rather than sourcing independently. Knowing stockpoint locations reduces mobilisation delays and simplifies cost tracking.

The replaceable filtering surfaces installed in vibratory shakers and separators on drilling and processing sites. Types include wire mesh, polyurethane, and rubber panels, each suited to different material grades. Subcontractors are often responsible for sourcing, swapping, and disposing of worn screen media during operations.

Highly mineralised, hot saltwater extracted from underground geothermal reservoirs during energy production. Subcontractors handling it must follow strict corrosion control and PPE protocols. Disposal and handling are heavily regulated due to its chemical content.

The process of moving equipment and personnel to a job site (mobilization) and returning them afterward (demobilization). Often billed as separate line items.

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When operators merge, get acquired, or sell assets, subcontractor agreements are caught in the middle. Learn how M&A activity affects your MSA, payment terms, vendor status, and what to do before, during, and after a deal closes.

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An AFE (Authorization for Expenditure) controls every dollar spent on an oilfield project. Learn how it affects your billing, change orders, and cash flow as a subcontractor.