rabbitrackracking capacity of the derrickracking platformradial cement thickness indicatorradial circular flowradial faultradial flowradiation loggingradio position fixingraftraft foundationram blow out preventerramp of the derrickrank wildcatraspratchet drillrate of declineratholeraw crude oilraw natural gasreactive turbodrillingreamer bladereamingreciprocal lateral sondereciprocal v the casingreciprocating scratcherrecompletion of a wellrecording gravimeterrecovery by in situ combustionrecovery of the casingrecumbent foldredox potential measurementredrillreduced radids of a wellreducing valvereed roller bitreeve v the wire lingreevingreflection methodreflection shootingrefraction methodrefraction shootingregenerated mudregional metamorphic rockregular tool jointregulating cockregulating valveregulation by stop cockreinforced concrete
