Izobilnoye-Dzhubga (Blue Stream) gas pipeline
As part of an intergovernmental agreement to deliver Russian natural gas to Turkey, Stroytransgaz as general contractor undertook construction of the Russian part of the Blue Stream pipeline system—the Izobilnoye-Dzhubga gas pipeline—in 2001 and 2002. Gazprom was customer for the project.
The pipeline is 370 kilometers long and has design capacity of 16 billion cubic meters of gas per year. Three compressor stations with combined capacity of 310 MW were also built within the project.
Technology
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Along level sections, we used welding spread method with automated complexes, which ensure high quality and rapid welding and assembly work.
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In order to build the eight river crossings that were required, horizontal directional drilling was used, significantly reducing work time and safeguarding the natural function of the water basins during work on the crossings.
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In the Greater Caucasus mountain range, construction took place along the most difficult Russian section: the gas pipeline intersected 21 ridges, 34 landslide zones, 32 tectonic faults, deep ravines and water passages. Tunnel-shield driving was used to reduce the risk of accidents and negative influences on the ecosystem, and to increase the operational reliability of the gas pipeline. This was the first time in the Russian oil-and-gas construction industry that the method was employed. Three tunnels were built with combined length of 3,266 meters.