Working Interest

A tie-in is the physical connection of new pipeline or equipment to an existing operational system. For subcontractors, tie-in work often requires strict scheduling around shutdowns and may involve additional safety and permitting requirements. Scope changes during tie-ins can affect billing, so clear change-order terms are essential.

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.

The ability of different software systems, tools, or equipment to work together without manual workarounds. For subcontractors, this means your timesheets, invoicing, and reporting tools can connect directly with a prime contractor's systems. It reduces double-entry errors and speeds up approvals and payments.

A closed vessel used to process materials in discrete, timed cycles rather than continuously. Subcontractors may be called to inspect, clean, or maintain these units during scheduled shutdowns. Work is typically project-based, tied to turnaround or maintenance contracts.

A FAD is an engineering tool used to assess whether a crack or defect in a component is safe to operate or requires immediate repair. Subcontractors use FAD assessments to support fitness-for-service decisions on pressurised piping, vessels, and structural welds. Results directly influence repair scopes, shutdown planning, and liability on field service contracts.

A rock formation believed to contain oil or gas, targeted for drilling or evaluation. Subcontractors are often mobilised to support exploration work within these zones. Scope and duration of field service contracts may depend on how many prospective intervals a well will test.

How Operator Mergers and Acquisitions Affect Your Subcontract Agreements

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.

How Rig Count Trends Affect Subcontractor Demand and What to Do About It

Rig counts are the earliest signal of where field service work is heading. Learn how to read drilling activity trends, anticipate demand shifts, and position your crew before the phone stops ringing.

What Is an AFE in Oil and Gas and How Does It Affect Subcontractor Payments?

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.