Oilfield Terminology & Definitions.
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Oilfield Terms Starting with "L"

  • LACT Unit (Lease Automatic Custody Transfer)
    4

    A LACT Unit (Lease Automatic Custody Transfer) is a standardized, skid-mounted metering and sampling system used in the oil and gas industry to automatically measure…

  • Liner
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    A liner is a string of casing that is run into a wellbore and hung from the bottom of a previous casing string, rather than…

  • Liquefied Natural Gas (LNG)
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    Liquefied Natural Gas (LNG) is natural gas that has been cooled to approximately -162°C (-260°F) at atmospheric pressure, transforming it into a clear, colorless, and…

  • LOPA
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    Layer of Protection Analysis (LOPA) is a semi-quantitative risk assessment methodology widely used in the oil and gas and petrochemical industries. It systematically evaluates the…

  • Lost Circulation
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    Lost circulation is the uncontrolled, partial, or complete loss of drilling fluid (mud) into subterranean formations during drilling, completion, or workover operations. It is one…

  • LOTO
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    Lockout/Tagout (LOTO) is a critical safety procedure used in the oil and gas industry to control hazardous energy during maintenance, repair, or servicing of equipment.…