WCS Glossary
- Gravitational Energy
- Gravitometer
- Gravity, Specific
- Guide Shoe
- Gumbo
- Gun-Perforate
- Gunk Plug
- Gusher
- Guy Line
- Gypsum
- Hang-Off
- Hanger
- Hard Shut-In
- Hardness (Of Water)
- Hazardous Gasses
- HAZID
- HAZOP
- Head
- Head-Capacity Curve
- Head Pressure
- Header
- Heat Exchanger
- Heater
- Heater-Treater
- Heaving
- Heaving Shale
- High Recovery Pressure Control Valve
- High Signal Converter
- Hoist
- Hole Stability Pressure:
- Hook
- Hook-Wall Packer
- Hopper, Jet
- Horsepower
- Host Rock
- Hot work
- HSE MPD
- Hunting
- Hydrate
- Hydration
- Hydraulic Fracturing
- Hydraulic Gradient (grade line)
- Hydraulic Head
- Hydraulic Horsepower
- Hydraulic Profile
- Hydraulic Workover Unit (HWO)
- Hydraulics
- Hydrocarbon
- Hydrochloric Acid
- Hydrogen Sulfide (H2S)