up-stream - in the oil and gas industries: at or towards the source of production; spec. at a stage in the process of extraction and production before the raw material is ready to be refined, upstream pipeline network - any pipeline or network of pipelines operated and/or constructed as part of an oil or gas production project, or used to convey natural gas from one or more such projects to a processing plant or terminal or final coastal landing terminal, torustikud töötlemistsehhides, kus teostatakse süsivesinike ekstraheerimist jms, attivita di "upstream",cioc di esplorazione ed estrazione del petrolio e degli altri idrocarburi