FIELD: oil and gas industry.
SUBSTANCE: group of inventions relates to oil and gas industry, in particular, to well liquidation operations. Method includes steps of placing and supporting a cement-equivalent element of an impermeable well barrier inside a controlled usable space formed by a cable and non-reducing which is made with possibility of interaction in inter-tube space with element containing components, which are cable and non-reducing whip, made with possibility of transportation along the most internal channel, surrounded by at least one annular space from set of annular space formed by concentric pipes passing downwards from wellhead to underground layers. Energy transmitted by non-reducing whip or movable fluid medium of column of circulating medium inside multiple channels, to control an element configured to interact in the annular space to access the annular space from the innermost channel to displace a portion of the pipe wall around the innermost channel to provide a usable space for forming a bridge through an usable space and to accommodate at least one cement-equivalent element of an impermeable well barrier through a usable space adjacent to the coating rock to form at least one geological space existing in a given time interval, suitable for fluid isolation of a part of an underground well without removal of installed pipes and related fragments from lower part of one or more underground depths of associated covering rock for providing or providing possibility of permanent covering of rock over production area, and providing element, made with possibility of mechanical or hydraulic arrangement of pressure-holding packer, which can expand inside the usable space and is configured to lock or axially displace within at least one of said plurality of channels to provide: said displacement of said at least one wall portion of said at least one pipe to form a usable space; said jumper formation through said usable space; or said arrangement of at least one cement-equivalent element of impermeable well barrier across usable space for fluid insulation of at least one part of said underground well.
EFFECT: increased reliability of elimination, simplified technology, enlarged technological capabilities.
46 cl, 150 dwg
