Super-long thermal insulation steel jacket pipe and machining process thereof

摘要

In the present invention, a long heat-insulating steel sleeve steel pipe and its processing process have been disclosed, and the pipe has excellent heat preservation performance and antiseptic performance, and its annular cavity is in a vacuum state, inside which a support is installed and a phase change material is filled. . When mining underground energy using this, if the external temperature falls, it can be effectively secured so that the temperature in the working steel pipe in the pipe is not affected. The steel sleeve steel pipe of the present invention has a long service life and greatly reduces the cost of mining oil and underground heat sources, and can reduce heat energy loss during the mining process.