D&C - Drilling and Completions
dBA - Decibles
DC – Direct Current, elet
DC - Drill Collar, Drilling
DCDA - Drilling Control & Data Acquisition
DCP - Driller's Control Panel
DCR – Drillers' Control Room, rig eqipment
DD - Directional Driller
DD - Directional Drilling
DDM - AKMH terminology for a Top Drive "Derrick Drilling Maching"
DDU - Delivered Duty Unpaid
DE – Diatomaceous Earth (filtration system for cleaning mud)
DEAL - Digital Energy Atlas & Library
DFMA – Drill Floor Manipulator Arm
DGD - Dual gradient Drilling
DGPS - Differential Global Positioning System
DHSR - Degrees of Hydrate Suppression Required
DHSV - Downhole Safety Valve
DIS - Danish International Register of Shipping - Danish Maritime Authority
DIS - Draft international standard
DL - Development Licence
DLat - difference in latitude
DLL - Dual LateroLog
DLong - difference in longitude
DLS - Dog-Leg Severity
DMDO - Distillate Marine Diesel Oil
DNC - Digital Nautical Chart
DNV - Det Norske Veritas
DO - Dissolved Oxygen
DO - Division Order
DOC - document of compliance
DOE - US Department Of Energy
DOT - US Department of Transportation
DP - Drill Pipe
DP - Dynamic Positioning
DPDV - Dynamically-Positioned Drilling Vassal
DPO - Dynamic Positioning Operator
DPP - Development and Production Plan
DPP - Drill Pipe Pressure
DR - Dead Reckoning
DR - Delay Rental
DRT – Drilling Riser Tensioner
DS - Drillship
DSC - Dangerous Goods, Solid Cargoes and Containers
DSM – Drilling Service Module
DSPL = Drillstring Pressure Losses
DSS - decision support system
DST - Drill Stem Test
DSV - Diving Support Vessel
DSV - Drilling SuperVisor
DTH _ down the hole
DTI - Department of Trade and Industry (UK)
DTL - Drilling to the Limit.
DTS - distributed temperature sensing
DTU – Dry Tree Unit
DV Tool - stage tool used for cementing
DW - Drawworks
DWT - Deadweight tons
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