33 51 00 Hydrocarbon Sources
33 51 33 Liquid Injection Wells
33 51 13Appraisal Wells for Liquid Hydrocarbons33 51 16Appraisal Wells for Gaseous Hydrocarbons33 51 23Production Wells for Liquid Hydrocarbons33 51 26Production Wells for Gaseous Hydrocarbons33 51 33Liquid Injection Wells33 51 36Gas Injection Wells33 51 39Monitoring Wells33 51 53Reciprocating Pumpjack33 51 56Submersible Liquid Hydrocarbon Pumps