Drilling Industry Glossary
daily drilling report
density hierarchy
diamond bit
differential pressure
differential survey
directional drilling
directional drilling software
displacement fluid
doghouse
dogleg
dogleg severity
donkey pump
doughnut
downhole motor
draw works
drill collars
drill collar sub
drilling engineering design
drilling fluid
drill pipe
drill stem
drill string
dry hole
dutchman
Drill Collar Sub
A sub made up between the drill string and the drill collars used to ensure that the drill pipe and the collar can be joined properly.
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