The invention described in this article relates to oil producing and oil refining industries. It can also be used in other sectors related to operation of vertical steel tanks.

There is a spontaneous deposition of salts, paraffin, asphalt and resin compounds on the inner surface of a tank’s shell (wall); fine rock particles form muddy deposits on the bottom of a tank and oil emulsions that negatively affect the quality of oil.

Operational specifications of oil storage tanks provide for their cleaning at regular periods of time.

The cost of the known methods of tank cleaning is very high and companies cannot afford it. That leads to a situation when companies use manual labor under harmful conditions for inadmissibly long period of time and experience a shortage of oil storage tanks during the cleaning time.

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