depleted areadepleted fielddepletiondepletion of gasdepletion ratedepositdeposit of petroleumdepthdepth gagedepth measuring paneldepth of penetrationdepth of the holedepth rangedepth surveydepth time curvedepthfinderderrick cellarderrick cornicaderrick cranederrick deckderrick dismantlingderrick floorderrick foundationsderrick girthderrick grillagederrick guyderrick hook loadderrick legderrick manderrick platformderrick roofderrick safety cagederrick safety gasederrick sillderrick skidding railderrick substructurederrick window v door window openingdesander desanding devicedesiccationdesiccatordesilterdetection of gas on coresdetergentdetrital depositdetrital sedimentdevelopment drillingdevelopment welldevelopment zonedeviation from the vertical driftdeviation log inclinometer log
