- drainage pattern
- drainage pump
- drainer
- Draper effect
- draw bridge
- drawing
- drawing height
- drawing shaft
- drawn
- drawnorks
- dredging
- dredging scoop
- dried
- drift avalanche
- drift breccia
- drift correction
- drift indicator
- drift set
- drift station
- drift structure
- drifted material
- drill column
- drill steel
- drillability
- drillable plug
- drilling
- drilling conditions
- drilling contractor
- drilling core
- drilling fluid
- drilling gang
- drilling time
- drip trap
- drive chain
- drive head
- drop
- drop black
- drop sheet
- drop test
- dropping funnel
- drown
- drum process
- druse structure
- dry chlorination
- dry coal
- dry gas
- dry hole
- dry lake
- dry moor
- dry pipe
- dry purification
- dry residue
- dry river
- dry scrubbing
- dry sump
- dry tree
- dry wall
- dry well
- drying mark
- dual fuel
- dual packer
- Dualayer process
- Dubbs process
- ducitol
- ductile crack
- duffite
- dug earth
- Dukler theory
- dull coal
- dull fracture
- dumortierite
- dump
- dump body
- dump gas
- dump tank
- drift boulder
- drift post
- drift terrace
- drifting
- drill post
- drilling activity
- drilling clamp
- drilling control
- drilling permit
- drip cup
- drip gasoline
- drive pipe
- driving screw
- driving strap
- driving trough
- drop point
- drop reaction
- drop tank
- drossy coal
- drowned
- drowned valley
- drowned well
- drum
- drum washer
- dry bed