WCS Glossary
- Lag Time
- Laminar Flow
- Landing Point (LP)
- Law of Conservation of Energy
- Lay Down Pipe
- Leak Detection
- Leak-Off Test (LOT)
- Lease
- Lignosulfonates
- Limestone
- Line Break Detector
- Line Fill
- Line Looping
- Line Pack
- Line Pack or linepack
- Line Section
- Linear Valve Flow Characteristic
- Liner
- Liquefied Natural Gas (LNG)
- Liquefied Petroleum Gas (LPG)
- Liquid
- Liquid Leak Detectors
- Live Well
- Load Factor
- Load Profile
- Load Shifting
- Log
- Look-ahead Model
- Loop
- Loop-Fill
- Loop Swing
- Looping
- Lost Circulation
- Low head
- Lower Explosive Limit (EL)
- Lower Explosive Limit (LEL)
- Lower Kelly Cock
- Lube and Bleed
- Lubricator Stack