FIELD: oil and gas industry.
SUBSTANCE: cylindrical pipe containing flexible and radially expanded upper part and equipped at its bottom with sealing gasket which can also be expanded in radial direction under action of pipe weight is used. Dimensions of the above pipe are determined so that upper section is above failed zone while the pipe bottom rests on working face of drilled well section. When the method is being implemented, pipe is introduced to the well so that its bottom is in position when it is borne against working face and leads to radial expansion of tight seal; radial expansion of upper pipe section with exceedance of its flexibility limit is performed by means of reamer so that it is tightly pressed to the well wall above failed zone.
EFFECT: improving insulation efficiency; minimising the costs.
14 cl, 8 dwg
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