WCS Glossary
- Mud Acid
- Mud Balance
- Mud Cap
- Mud Density
- Mud Flow Indicator
- Mud Gas Separator
- Mud/Gas Separator (MGS)
- Mud Logging
- Mud Pit
- Mud Pump
- Mud Return Line
- Mud Weight
- Multi-Phase Flow
- Multi-stage Pump
- Multiphase / Low Head
- Multiple Completion
- Natural Gas
- Natural Gas Liquids (NGL)
- Near Balance
- Neat Cement
- Necking
- Needle Valve
- Negative Test
- Net Positive Suction Head Available (NPSHA)
- Net Positive Suction Head (NPSH)
- Net Positive Suction Head Required (NPSHR)
- Net Pumping Requirement
- Net Standard Volume
- Network
- Neutralization
- Newtonian Fluid
- Nipple
- Nipple Up
- Nitrogen
- Node
- Non-Aqueous Fluid (NAF)
- Non-Condensable Gasses (NCG)
- Non-Recoverable Energy
- Non-shearable
- Normal Circulation
- NPSHR Capacity Curve
- NRV
- Occupational Level Appropriate Well Control
- OD
- Off-line Model
- Offset Well
- Offshore Drilling
- Oil And Gas Separator
- Oil and Gas Separator
- Oil-Based Mud (OBM)