TVD (True Vertical Depth)

Natural gas composed almost entirely of methane, with minimal liquid hydrocarbons. Subcontractors working dry gas sites face simpler handling requirements but often leaner margins than wet gas projects. Expect lighter equipment specs and fewer fluid management scopes.

A form of metal cracking caused by hydrogen sulphide (H₂S) exposure under stress, common in sour gas environments. Subcontractors must use SSC-resistant materials and equipment rated for sour service on these sites. Non-compliant tools or components can fail catastrophically, creating serious liability and safety risks.

The decommissioning of wells, pipelines, or infrastructure located in shallow coastal waters. Subcontractors typically handle diving operations, cutting, capping, and seabed remediation work. Regulatory requirements are strict, so current certifications and environmental compliance documentation are essential before mobilising.

An early project phase where owners assess technical and commercial feasibility before committing to full design. For subcontractors, it signals potential future scope but rarely includes direct field work. Winning study contracts at this stage can position your company for larger awards later.

The ongoing assessment and maintenance of stationary assets like pressure vessels, piping, and heat exchangers to ensure safe operation. Subcontractors are often hired to perform inspections, repairs, and fitness-for-service evaluations on this equipment. Work must align with owner specifications and regulatory standards such as those set by the Alberta Boilers Safety Association.

A formal document a subcontractor submits to a prime contractor or operator to express intent to bid on upcoming work. It is not a binding commitment, but helps secure a spot in the tender process. Common in pre-qualification stages for large oilfield or construction scopes.

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.