A form of steel degradation that occurs when hydrogen penetrates metal at high temperatures, causing cracking and equipment failure. Subcontractors working on refineries or pressure vessels must verify equipment is rated for HTHA risk before beginning work. Inspection and repair scopes in affected units often require specialised NDE certifications and strict safety protocols.
HTHA (High Temperature Hydrogen Attack)
Related Terms
Frac Sand Hauling
IndustryThe trucking of proppant (silica sand) from storage terminals to active frac sites. Subcontractors operate on tight dispatch schedules to maintain continuous sand supply during pumping operations. Contracts often include standby rates for wait time at the wellsite.
Shipper Commitment
IndustryA contractual obligation by a producer or operator to move a set volume of product through a pipeline over a defined period. These agreements often drive project timelines and mobilisation schedules for field service subcontractors. Steady shipper commitments signal stable, longer-term work opportunities in a given region.
IMR (Inspection, Maintenance, and Repair)
IndustryA category of ongoing field service work covering routine inspections, preventive maintenance, and corrective repairs on infrastructure or equipment, often awarded to subcontractors through standing agreements or blanket contracts. For field service companies, IMR scopes provide a reliable stream of recurring work but typically require crews to mobilise quickly and hold multiple trade certifications to meet operator requirements.
Mud Logging
IndustryA well-site service that monitors drilling fluid returns to detect hydrocarbons and analyse formation data in real time. Subcontractors provide specialised technicians and instrumentation units for this work. It is commonly scoped as a standalone package within a drilling contract.
Drillship
IndustryA self-propelled vessel equipped with a drilling rig used for offshore exploration and production in deepwater locations, which subcontractors may be mobilised to for specialised services such as equipment maintenance, inspection, or crew support under strict offshore safety and logistical requirements.
Upstream
IndustryThe segment of the oil and gas industry involved in exploration and production (E&P). Includes drilling, completions, and well operations.
Latest Industry News
Highway Funding Extension Buys Contractors 10 Weeks, Not Certainty
Congress extended IIJA surface transportation funding to Dec. 11, but left out advance appropriations, threatening bridge programs and new state DOT lettings, Construction Dive reports.
11 hours agoIndustryDOE's $1.9B Transmission Push Signals Near-Term Work for Line Crews
The Department of Energy will fund 31 grid-improvement projects worth $5.3 billion in combined spending, adding 23 GW of capacity and generating reconductoring and substation work across multiple states.
yesterdayIndustryFBI, ATF Investigate Suspicious Fires at Line 5 Site and Enbridge Office in Wisconsin
The FBI and ATF are investigating two suspicious fires, one at an Enbridge Line 5 drilling site in Ashland County, Wisconsin, and another at an Enbridge office in Superior, Wis., raising security concerns for pipeline contractors.
yesterdayIndustryFormer GSA Official Sentenced to 3 Years in Subcontractor Bribery Scheme
A former GSA contracting officer's representative was sentenced to 36 months for steering construction work at the St. Elizabeths West Campus to favored subcontractors in exchange for kickbacks, Engineering News-Record reports.
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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.
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