Deep well insulation, corrosion resistance, wear resistance and pressure resistance composite pipe

Abstract

This invention relates to the field of oil extraction equipment technology and comprises a deep well insulation, corrosion resistance, wear resistance, and pressure resistance composite pipe, consisting of a steel pipe body and a polymer composite pipe arranged sequentially from the outside to the inside. The polymer composite pipe includes a polymer outer layer pipe and a polymer inner layer pipe arranged sequentially from the outside to the inside, with a composite insulation layer between the polymer inner layer pipe and the polymer outer layer pipe. This invention provides a deep well insulation, corrosion resistance, wear resistance, and pressure resistance composite pipe that, without altering existing oil lifting and geothermal extraction processes, increases the temperature of the deep wellbore, improving the lifting conditions for heavy oil and other oils. For geothermal wells, deep wellbore insulation reduces geothermal energy loss and improves geothermal utilization efficiency.

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