FIELD: well drilling, particularly, isolation of zones of lost-circulation and fractures of hydrofracturing of formation in string cementing. SUBSTANCE: method includes supply of calculated volume of grouting mortar with filler. Said volume is determined by formula Vp=Va+DwxL/a, where Va is volume of annular space with consideration of cavernosity, cu.m; Psp is specific pressure with consideration of relationship of opening of fractures of lost circulation and well pressure, Mpa; Dw is well diameter with consideration of cavernosity, m; L is well length in zone of minimum hydrofracturing gradient, m; a is hydrofracturing gradient of rocks of slightly consolidated bed, Mpa/m. EFFECT: provided rise of grouting mortar to planned height.
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