Lng (liquefied Natural Gas) Train

A formal business arrangement where two or more companies partner to pursue a specific project or contract, which can affect subcontractors by changing who issues purchase orders, approves invoices, or holds liability on site. Field service companies should confirm early which JV partner is the contracting entity to avoid payment delays or scope disputes.

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 decision-making framework used to evaluate whether aging or damaged equipment should continue operating, be repaired, or be swapped out entirely. Subcontractors are often called in to assess assets and execute whichever option the client authorises. Understanding this process helps field crews scope work accurately and avoid scope creep on site.

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.

A geophysical mapping operation that uses sound waves to image underground formations before drilling begins. Subcontractors are hired to deploy geophones, vibroseis trucks, or marine streamers across large survey grids. Work is often remote and time-sensitive, with crews mobilising quickly once permits are secured.

A series of vibrating screens used on-site to separate solids by size from drilling fluids or aggregates. Subcontractors operating or maintaining this equipment must track run-hours carefully for service billing. Screen cloth replacement is a common scope item in solids-control contracts.

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.