FIELD: laying of oil pipelines.
SUBSTANCE: invention relates to construction and operation of oil pipelines in Northern areas in ice-loaded soils at nonuniform sagging. Oil main pipe line is laid in trench on supports connected to vertical pipes operating on thermosiphon principle. Holes are drilled in soil and pipe with hermetically sealed lower end face is lowered into hole. Upper end of pipe over snow cover is hermetically connected to tubular recuperative heat exchanger-condenser. Bracket-support for main pipeline is welded at trench bottom level to pipe, and upper half of pipe is thermally insulated. Inner spaces of device are evacuated and partially filled with low-boiling liquid, preferably, ammonia.
EFFECT: improved reliability of underground pipeline.
2 dwg
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