An ultrasonic weld inspection method used to detect and size internal flaws in pipelines and pressure vessels. Subcontractors performing NDT work must hold TOFD-specific certifications to qualify for this scope. It is widely accepted by regulators as an alternative to radiographic testing.
TOFD (Time-of-flight Diffraction)
Related Terms
Grid Modernization
IndustryThe large-scale upgrading of electrical infrastructure to support smart technologies, renewable integration, and improved reliability. For subcontractors, it drives demand for specialised installation, maintenance, and inspection work. Crews may be deployed on projects ranging from substation upgrades to smart metre rollouts.
Bakken Play
IndustryA major tight-oil producing region spanning North Dakota, Montana, and southern Saskatchewan and Manitoba. Subcontractors working here should expect high-volume horizontal drilling and multi-stage fracturing scopes. Seasonal road bans and remote logistics significantly impact crew mobilisation and equipment scheduling.
Co-Location (data Centre)
IndustryA shared facility where subcontractors rent server space instead of maintaining their own IT infrastructure. This reduces overhead costs for smaller field service companies managing dispatch, invoicing, and project data. Providers handle power, cooling, and security at the facility.
Long-Cycle
IndustryRefers to large capital projects with lead times and development phases spanning several years. For subcontractors, long-cycle work offers extended contract visibility but requires patience on mobilisation and payment timelines. Budget cycles and scope changes are common over the project life.
Negative Gas Prices
IndustryOccurs when oversupply forces producers to pay buyers to take gas, signalling severe market stress. For subcontractors, this often triggers rapid project suspensions, deferred work orders, and delayed payments. Expect scope reductions and early contract terminations when prices turn negative.
Custody Transfer
IndustryThe formal handover point where ownership or responsibility for a measured quantity of oil, gas, or other product moves from one party to another — typically triggering billing, invoicing, or contractual obligations for subcontractors involved in metering, transport, or handling operations. Field service crews working custody transfer points must ensure measurements are accurate and fully documented, as discrepancies can directly affect client invoices and liability.
Latest Industry News
EIA Sees Record US Crude Output in 2026 on Permian, Gulf Gains
The EIA forecasts US crude oil production will average a record 13.8 million b/d in 2026, driven by Permian basin growth and new Gulf of Mexico projects.
11 hours agoIndustryEIA: Solar Generation to Jump 21% in 2026 on Data Center Demand
The U.S. Energy Information Administration forecasts solar generation growth of 21% in 2026 and 18% in 2027, driven by data center and manufacturing electricity demand, with growth concentrated in ERCOT and MISO.
11 hours agoIndustryPennsylvania PUC Opens Review of Data Center Rates, Curtailment Rules
The Pennsylvania PUC voted to examine ratemaking transparency and emergency curtailment rules as data center load growth strains PJM grid capacity, setting up regulatory changes that could reshape utility rate cases and interconnection timelines.
11 hours agoIndustryAmtrak's $6B Baltimore Tunnel Overhaul Signals Years of Heavy-Civil Work Ahead
Amtrak's Frederick Douglass Tunnel program is advancing through bridge rebuilds, utility relocations and TBM manufacturing, setting up a long pipeline of design-build and specialty-trade packages on the Northeast Corridor.
yesterdayRelated Guides
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.
Industry GuideHow 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.
Industry GuideWhat 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.
Stay sharp on field operations
Industry news and insights, delivered to your inbox.
Subscribe to FieldNews
