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The article describes the impact of the use of polyurethane insulation on the tubes sclerosis by hydrate when gas is taken from the “dome-separator”, installation that designed for emergency hydrocarbon collection at the bottom of the ocean. Such an installation collects hydrocarbons directly above the breakthrough point at the bottom of the ocean, and their transportation is carried out through pipes to the collecting vessel. Currently, in the conditions of the development of the Arctic shelf in order to increase the level of oil production, such breakthroughs can cause enormous damage to the ecosystem, in particular, in the Arctic Ocean, since living organisms that exists in the harsh conditions of these latitudes are more sensitive to changes in the environment. But during the passage of gas through the exhaust pipe in the presence of moisture and corresponding thermodynamic conditions, a hydrate formation process occurs. This phenomenon can cause the pipeline to overlap and impede the normal operation of the selection of hydrocarbons from great depths. To prevent these consequences, work suggests possible options for warming the pipeline. It is shown that sclerosis of a pipe extending to great depths can be prevented even with small values of polyurethane foam insulation.

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The paper describes the use of the installation of the dome-separator, which is a huge tank, cylindrical in shape and open from the bottom. The installation height reaches several tens of meters and a radius of several meters. Such a design can be made of elastic (such as polyurethane, rubber) or hard (duralumin) materials. The dome-separator can be used to eliminate the breakthroughs of gas and oil wells at great depths (more than 500 meters), when blocking the well is a difficult event. Sufficiently large dimensions of the installation are needed so that the mixture entering it can be separated into gas and oil phases for selective selection. Also, the dome-separator can be used as a method of extraction. The manufacture of such a structure from elastic materials contributes to an easier way to transport the dome-separator to the place of operation. The mathematical modeling of such an installation showed that the manufacture of a rubber dome-separator contributes to more efficient heat storage inside the structure, which has a beneficial effect on the decomposition of hydrate, which can be formed under operating conditions.

In this work, on the basis of the equations of a bubbly liquid, a numerical simulation of the process of propagation of pressure waves of moderate amplitude, accompanied by the synthesis of gas hydrate in water with gas bubbles Freon-12, was carried out. The dynamics of plane-one-dimensional shock waves with a stepped profile, the volumetric gas content of the gas in the gas-liquid medium, and the average density of the gas hydrate are shown. The situation is considered when in the initial state of the bubble mixture hydrate formation does not occur, but when exposed to a shock wave, due to an increase in pressure in the bubbles and their fragmentation, favorable conditions for hydrate formation are created at the interface. Also, the use of gas hydrate synthesis technologies creates prerequisites for solving the problem of the greenhouse effect on the planet, and hence the climate. One of the solutions may be an increase in the interphase surface upon contact between water and hydrate-forming gas. Some theoretical calculations based on the model of gas hydration behind the pressure wave are presented.