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A colorless, odorless gas, Nitrogen is a non-hydrocarbon inert gas used for a variety of functions in the drilling, workover and completion phases of oil and gas wells, as well as in pigging and purging pipelines. colorless, odorless gas, Nitrogen is a non-hydrocarbon inert gas used for a variety of functions in the drilling, workover and completion phases of oil and gas wells, as well as in pigging and purging pipelines.
Liquid Nitrogen Facts. 1  Liquid nitrogen is the liquefied form of the element nitrogen that is commercially produced by fractional distillation of liquid air. 2  Sometimes liquid nitrogen is denoted as LN 2, LN, or LIN. 3  Liquid nitrogen has the UN number 1977.