FIELD: treatment of underground beds. SUBSTANCE: treatment liquid is injected to selected horizons inside bed by blocking of flow to definite zones. At the same time, possibility of flow passing to other zones is also provided. Treatment tube runs in essence through bed and contains perforated pipeline. The latter is open at its upper end and has many holes spaced along its entire length. Each hole has valve seat inside said pipeline at its inlet. It is made for reception of valve means for packing and blocking of flow through said hole. In the course, of operation, treatment liquid flows through treatment tube and appears to outside from hole to various horizons inside borehole. During desired time intervals, introduced into treatment liquid is valve means and transferred into treatment tube for its installation on respective hole to block flow through hole and provide continuous passage of flow through other holes. EFFECT: higher efficiency of treatment. 10 cl, 3 dwg
