FIELD: mining.
SUBSTANCE: group of inventions relates to methods of well completion. Well completion method, according to which an existing tubular item is fixed in the well shaft formed by the borehole wall; an additional tubular item with an initial through diameter is delivered through the existing tubular item to a position with such overlapping with the existing tubular item, that a section of the additional tubular item extends behind the lower end of the existing tubular item; at least one outer seal is installed in a recess of the additional tubular item; at least one outer seal is extended behind the said recess before the expansion; a significant section of the tubular item length is expanded towards the wall of the borehole; the seal is brought into interaction with the surrounding uncased borehole to be tight with it.
EFFECT: technical result is high reliability of the sealing element operation.
20 cl, 4 dwg
