FIELD: means for destroying materials, particularly heat insulation material applied to outer pipeline surface in closed space, for instance in oil well.
SUBSTANCE: method for destroying heat-insulation material produced in sol-gel process formed by organogel and arranged in closed space involves percolating water through heat insulation material upwards; percolating main liquid solvent selected from sodium hydrate NaOH, potassium hydrate KOH, ammonium hydrate NH4OH, alkaline-earth calcium hydrate Ca(OH)2 or magnesium hydrate Mg(OH)2 solution or suspension or mixture of above components and rinsing closed space. Main liquid solvent is preferably heated before use by circulation thereof through heat exchanger. Water is also preferably heated before use by circulation thereof through heat exchanger. Organogel is preferably dried in xerogel before main liquid solvent introduction. Main liquid solvent is ejected into closed space under increased pressure.
EFFECT: increased simplicity and efficiency, possibility of full heat-insulation material removal from space.
7 cl, 3 ex, 1 dwg
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