METHOD FOR DESTROYING PARAFFIN-HYDRATE AND PARAFFIN-TARRY SEDIMENTS Russian patent published in 2006 - IPC E21B36/04 E21B37/06 

FIELD: oil and gas industry, namely, operation of oil extractive wells, product lines and gas lines for various (commercial, etc) purposes.

SUBSTANCE: in accordance to method, solution of oxygen-containing substances is fed and heated up. Mixture of hydrocarbons in pipes and oxygen-containing substances is activated by means of periodically enabling local heaters, which are positioned in a well and inside or outside the pipes, along which petroleum is transported. On first local heaters hydrocarbons and oxygen-containing substances are activated also by waves of negative pressure, while forcing of oxygen-containing substances is performed periodically and in such a way, that during passage of mixture of hydrocarbons and oxygen-containing substances through local heater, temperature of locally heated zones is maintained at level not less than that of mixture's spontaneous inflammation temperature.

EFFECT: decreased laboriousness and energy costs when cleaning pipes for transit of petroleum (hydrocarbons) from paraffin-hydrate and paraffin-tarry sediments, and increased duration of possible operation of pipes without maintenance.

4 cl, 1 ex, 1 dwg