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Part of Petroleum Industry related to managing gathering production of hydrocarbons from subsurface deposits, maintaining the wells, metering, primary gas and crude processing and transportation of hydrocarbons to Commercial Metering Stationtransporting, metering and maintaining
- produced hydrocarbons from wellheads all the way to Commercial Metering Station
and
- injection fluids (water, gas, chemicals) from supply source to wellheads.