it possible to run in the arrangement to the section to be cleaned and to pull it out without any troubles and speed restrictions the arrangement is entered in a casing string without any hinderance after the arrangement has been run in the section to be cleaned the circulation of the drilling fluid through the string of pipes 4 is restored and an excess pressure of 3 6 mpa is built up in the space 9 of the elastic vessel 8 the value of excess pressure is controlled by changing the diameter of the drilling fluid passages of the connection 5 or more expeditiously by changing the output of a pumping unit when the arrangement is cut into operation the elastic vessel 8 extends the cutting blades 7 from the slots 6 of the body 1 by acting upon them through the spring 12 by its outer wall the cutting blade is pressed against the surface to be cleaned fig1 and 3 with force corresponding to the value of an excess pressure the flat ends of the flat spring element 12 constantly rest against the arrangement body 1 and practically do not change their position relative to the bushing 10 the arc shaped portion of the flat spring element 12 disposed in the longitudinal port 11 of the bushing 10 is straightened out under the action of the wall of the elastic vessel 8 enters the port 11 of the bushing 10 and covers the shoulder between the body 1 and the extended cutting blade 7 in the longitudinal section fig1 and 3.