trenchless drilling Terms beginning with "D"
- D-B
- d2
- Dam Board
- Damage Limitation
- Darmstadt Abrasion Resistance Test
- Data Logger
- Datum Plane
- Dead Man
- Debris
- Delay Time
- Desander
- Design Specification
- Design-Build (D-B)
- Desilter
- Deviation
- Dewatering
- Diameter of Reamer (d2)
- Digger Shield
- Direct Drive Motor
- Direct Pipe Tunneling
- Directional Boring (HDD)
- Directional Drill
- Directional Drilling
- Directional Plan View
- Directional Survey
- Directional Survey Data
- Directional Survey Station
- Directional Well
- Discrete Sliplining
- DLS
- DN
- Dogleg Severity (DLS)
- Double Fluid Jet Grouting
- Double-Entry Well
- Down the Hole Hammer (DTH Hammer)
- Downhole Drilling Assemblies
- Drag Bit
- Drill And Blast Tunneling
- Drill Bit
- Drill Head
- Drill Path
- Drill Rig
- Drill Rods
- Drill String
- Drill String/Stem
- Drilling Fluid
- Drilling Fluid Recovery Unit
- Drilling Waste Reduction
- Dripper
- Drive Shaft
- Drop Manhole
- Dry Boring
- Dry Hole
- DTH Hammer
- Duct
- Duct Bank
- Ductile Iron Pipe
