A scheduled swap of sucker rods in a pumping well, typically requiring a pulling unit crew and rod handling equipment. Subcontractors are often engaged on a per-job or dayrate basis to complete the workover. Accurate job scoping matters, as rod counts and depths directly affect mobilisation time and invoicing.
Rod Exchange
Related Terms
Letter of Interest
IndustryA 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.
PWHT (Post-weld Heat Treatment)
IndustryA controlled heating and cooling process applied to welds after completion to reduce stress and improve strength. Subcontractors must confirm PWHT requirements before mobilising, as it adds time, equipment, and certified personnel to scope. Failing to price it into your bid can significantly erode job margins.
AFE (Authorization for Expenditure)
IndustryA budgeting document used in oil and gas projects that outlines expected costs and seeks approval before work begins. Subcontractors often work under AFEs issued by operators.
FRP (Fibre-reinforced Polymer)
IndustryA lightweight, corrosion-resistant composite material used in piping, grating, and structural components on oilfield and construction sites. Subcontractors encounter FRP in offshore platforms, chemical plants, and water treatment facilities. It requires specialised handling and cutting procedures to avoid hazardous dust exposure.
NGL (Natural Gas Liquids)
IndustryHydrocarbons extracted from natural gas, including propane, butane, and condensate. NGL facilities and pipelines generate steady subcontract work in processing, instrumentation, and maintenance. Understanding NGL handling requirements helps crews meet site-specific safety and equipment standards.
Secondary Stress
IndustryIndirect mechanical stress that develops in structures or piping due to thermal expansion, settlement, or equipment movement. Unlike primary stress, it isn't caused by direct applied loads. Subcontractors must account for it during installation and inspection to avoid material fatigue and warranty disputes.
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