WCS Glossary
- Hydrostatic Head
- Hydrostatic Pressure
- Hydrothermal
- ID
- Immediately Dangerous To Life Or Health (IDLH)
- Impeller
- Impermeable
- Impression Block
- Incompressible Fluids
- Indirect Heater
- Induction Motor
- Inertia
- Influx Management Envelope (IME)
- Inhibitor
- Initial Circulating Pressure (ICP)
- Injection
- Injection Well
- Inside Blowout Preventer
- Instantaneous Measurement
- Instrument
- Intake Nozzle
- Interfacial Tension
- Interlocks
- Intermediate Casing String
- Internal Cutter
- Invert Oil-Emulsion
- Jar
- Jet
- Jet-Perforate
- Jetting the Well in
- Joint
- Junk
- Junk Basket
- Kelly
- Kelly Bushing
- Kelly Cock
- Kelly Valve Lower
- Kelvin
- Key Seat
- Kick
- Kick Intensity
- Kick Tolerance
- Kill
- Kill Line
- Kill Log
- Kill Rate
- Kill Rate Circulating Pressure
- Kill Weight Mud
- Kinematic Viscometer
- Kinematic Viscosity