ABSTRACT: A new chemical concept of cleaning has been developed to eliminate some negative demonstrations of the ageing processes of the bores. The point of presented cleaning method, which is established on knowledge of colloidal chemistry, makes use of treaded out medium ability that is able to throughput the profile of rock environment, to canalize and to tread out retentive oil substance by the capillary energy. By technology the medium application is possible to clean nevertheless direct into cleaned bore, alternatively into infiltration bores at compass of depression cone of cleaned bore. The results of combination of mechanicchemical cleaning of bore by hydraulic aperture of system HOPV Slovnaft RČ-39-B are presented at this accession.