- volute pump
- voog
- vortex breaker
- wedge
- wedge bolt
- wedge crack
- wedge key
- wedge valve
- wedge-shaped
- wedging agent
- weed killer
- weed oil
- week
- weep hole
- weevil
- weighbridge
- weighing tube
- weight clamp
- weighted
- weighted mud
- weighting compound
- weighting material
- weir
- weir tray
- weir valve
- wel moor
- weld
- weld bead
- weld crack
- weld interval
- weldability test
- weldable
- welded dike
- welding bead
- welding clamp
- welding flux
- welding head
- well cementing
- well location
- well permit
- well sample
- well sampling
- well site
- well test
- wenge
- westphalian stage
- wet oil
- wet process
- wet treatment
- wetting power
- wheel bearing
- whey
- whipstock
- white cobalt
- white copperas
- white damp
- white zinc
- whiteruss
- whizzer
- wholesale
- wieser formula
- Wigner supermultiplet
- wild gasoline
- wild well
- williamsite
- willow
- winch barrel
- wind drying
- wind gauge
- winding reel
- wing bolt
- wiper bearing
- wire cloth
- well bore
- well borer
- well core
- well density
- well log
- well logging
- well shooting
- well tester
- well-head
- welled-up
- welt
- westrumite oil
- wet analysis
- wet cell
- wet compression
- wet meter
- wet strength
- wet tree
- wettability
- wetted surface
- wetting fluid
- wharfage
- wheelerite
- whistling buoy
- white glowing
- white kerosene
- white scale