We have 22 entries in our Glossary for this letter.
LAN - Local Area Network
A data communications network which is geographically limited (typically to a 1 km radius) allowing easy interconnection of devices.
Ethernet is an example of a standard LAN.
French based Notified Body
Light Emitting Diode
LEL - Lower Explosive Limit
Below the LEL a mixture of substance and air lacks sufficient fuel (substance) to burn.
Local Equipment Room
Heating Value is defined as the amount of energy released when a fuel is burned completely in a steady-flow process and the products are returned to the state of the reactants.
The heating value is dependent on the phase of water/steam in the combustion products. When H2O is in vapor form the heating value is called LHV (Lower Heating Value).
The closeness to which a curve approximates a straight line or the deviation of an instrument's response from a straight line.
LNG - Liquefied Natural Gas
Natural gas (mainly methane) refrigerated to reach liquid phase suitable for transportation in specialised vessels or by pipeline.
Letter of Authorisation
Leading Oil & Gas Industry Competitiveness
An industry funded organisation that works with companies throughout the O&G industry to stimulate collaboration and improve competitiveness.
Letter of Intent
Lifting Operations and Lifting Equipment Regulations
UK regulations that aim to reduce risks to people’s health and safety from lifting equipment provided for use at work.
Spanish based Notified Body
LOPA - Layers of Protection Analysis
A semi-quantitative risk analysis technique.
LOPA results are intended to be conservative (overestimating the risk) and usually adequate to understand the required safety integrity level.
SIL Ratings Toolbox Page
Line of Sight
Typically used with reference to telecommunication devices.
LP - Low Pressure
Often used with reference to a utility or vent line e.g. LP air supply.
LPG - Liquefied Petroleum Gas
Butane and propane mixture separated from well fluid stream. LPG can be transported under pressure in refrigerated vessels
Low Specific Activity scale found adhering to pipe and equipment internals is mainly due to radium-226 produced from the decay of naturally occurring uranium-238.
Can present decommissioning problems.
LTI - Lost Time Incident
Accident resulting in personnel not being able to work as a result of their injury is called an LTI
Licence to Operate
Contract term generally denoting fixed price covering all services provided.
Logging While Drilling
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