WCS Glossary
- SMYS
- Snub
- Snubbing
- Snubbing Unit
- Sodium Bicarbonate
- Sodium Carbonate
- Sodium Chloride
- Sodium Hydroxide
- Soft Shut In
- Soft Shutdown
- Soft Start
- Solids Concentration
- Solids Control Equipment
- Solubility
- Sonic Flow Meter
- Sonic Logging
- Sonic Wave Speed
- Sour
- Sour Fluids (handling)
- Sour Gas
- Sour Water (handling)
- Source
- Space Out
- Spacer Spool
- Spear
- Specific Gravity
- Specific Heat
- Specific Heat Ratio
- Specific Speed
- Specific Weight
- Spider
- Spinning Chain
- Spitzglas Formula
- Spontaneous Potential (SP)
- Spud
- Square Law
- Squeeze
- SSV
- Stab
- Stabilizer
- Stack
- Stand
- Standard Temperature
- Standpipe
- Starch
- Startup/Shutdown
- Static
- Static Fluid Level
- Static Gradient
- Static Head