FIELD: construction of wells of various application, particularly, their casing and cementing. SUBSTANCE: method includes drilling of interval to be cemented. When opening of permeable formations, hardening material, for instance cement is introduced into drilling mud. Drilling mud with hardening material, for instance, cement is supplied by hydrauli8c jets onto well walls. In so doing, formed on well wall in wellbore zone by hydraulic jets is colmatation layer with concentration of solid phase of cement particles up to 75-90%. This provides for formation of waterproofing screen 15-30 mm thick. Then, casing string is lowered and cemented. EFFECT: higher seal of cementing due to reliable and durable isolation of entire complex of permeable formations within interval of grouting mortar rise behind casing string.
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