FIELD: mining.
SUBSTANCE: group of inventions relates to mining and can be used in borehole layout. Assembly has a housing with casing channel outlet openings for suspension and filters for fluid mud. Inner column is deployed in housing to perform installation of gravel toe to heel. Telescopic adjustment device (30) provides inner column lengths fit properly when deployed to toe layout. Control device (30) comprises first member (60) connected to one part of inner column; second member (40) telescopically connected to first member and connected to another portion of inner column; at least one ratchet device (65) arranged on first element (column 4, lines 22-28); and at least one safety device (50) disposed on second member and movable relative to at least one ratchet device. Sealing surface of device location in housing is separated isolated space and compacted on seals on inner column arranged to displace in housing. Fluid is pumped in column, provides increase of pressure, when opening column is connected with insulated space. Pressure increase indicates that tool is set to first location in layout, and other provisions for installation of tool can then be calculated with reference to it.
EFFECT: technical result consists in improvement of efficiency of well completion.
19 cl, 9 dwg
