closed structureclosed synclineclosing structural structureclosing valveclosure structural closureclosure time of a well shut in time of a wellcloud pointcloumnar fracturecmbinated string of casing combinationcoarse grainedcoarse grained fracturecoarse grained sandcoat ycoat y the pipe with a concrete coatingcoating dressingcoefficent of compression compression coefficentcoefficent of friction frictionalcoefficient of expansioncoefficient of hardnesscoefficient of pressurecoefficient of qualitycoefficient of settlingcoefficient of soilingcoffer shaped anticlinecohesive soilcold water pumpcollapse of the casingcollapsible bitcollapsing mastcollarcollar findercollared pipecollecting pipecolloidal fractioncolloidal mudcolloidal suspensioncolumn constructioncolumn drill column drilling machinecolumn of fluid column of liquidcolumn of mud mud columncolumn of oil oil columncolumn of water water cloumncolumnarcolumnar section stratigraphic columncolumnar strucyure prismatic structurecombination cementationcombination drilling rig combination rigcombination drivecombination socletcome y in come y into production
