Oilfield Terminology & Definitions.
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Health, Safety, Environment & Integrity

Health, Safety, Environment and Integrity (HSEI) programs protect workers, communities, and ecosystems in oilfield operations. They integrate risk assessment, emergency response, and ethical standards to prevent accidents and pollution.

  • Incident Investigation
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    Incident Investigation is a systematic, objective, and structured process used to examine workplace incidents—including accidents, injuries, near misses, spills, fires, explosions, or equipment failures—to identify…

  • ALARP
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    ALARP is an acronym for As Low As Reasonably Practicable. It is a fundamental principle in the oil and gas industry used to manage health,…

  • Barrier Management
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    Barrier Management is a systematic approach used in the oil and gas industry to identify, implement, maintain, and verify the effectiveness of barriers that prevent…

  • BOP
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    A Blowout Preventer (BOP) is a large, specialized valve or set of valves installed at the top of a wellbore (on the wellhead) to control,…

  • Confined Space
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    A confined space is any enclosed or partially enclosed area that is not designed for continuous human occupancy, has limited or restricted means of entry…

  • Corrosion
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    Corrosion is the gradual deterioration of materials, typically metals, caused by chemical or electrochemical reactions with their environment. In the oil and gas industry, corrosion…

  • Environmental Impact Assessment
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    An Environmental Impact Assessment (EIA) is a systematic, documented process used to evaluate the potential environmental, social, and health effects of a proposed project before…

  • ESD
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    Emergency Shutdown (ESD) is a critical safety system designed to automatically and immediately halt all or part of an industrial process when an abnormal condition…

  • FMEA
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    FMEA stands for Failure Mode and Effects Analysis. It is a systematic, proactive method used in the oil and gas industry to identify potential failure…

  • H2S
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    H₂S (Hydrogen Sulfide) is a colorless, flammable, and highly toxic gas with a characteristic rotten-egg odor at low concentrations. In the oil and gas industry,…

  • HAZOP
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    HAZOP stands for Hazard and Operability Study. It is a structured, systematic technique used in the oil and gas industry to identify potential hazards and…

  • Hot Work
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    Hot Work is any activity that involves the use of open flames, sparks, or heat-generating tools capable of igniting flammable materials. In the oil and…