Injecting nitrogen into an oil well not only increases the pressure inside the borehole and increases oil production, but also plays a buffering role in borehole measurement, completely avoiding the possibility of sludge pressure flattening the lower test tube inside the borehole. In addition, nitrogen is also used for drilling operations such as acidification, hydraulic fracturing, hydraulic blowing, and hydraulic packer adjustment. Filling natural gas with nitrogen can reduce the calorific value. When replacing crude oil pipelines, the materials at both ends can be solidified and blocked by liquid nitrogen combustion. The application of nitrogen in coal powder pressure transportation is safe, convenient, and economical.

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