FIELD: mining.
SUBSTANCE: invention relates to mining, in particular to the oil producing industry, and can be used for separate exploitation of oil wells. The multifunctional packer comprises a pipe connected from above with the column of pumping and compression pipes and from below with the submersible electrically-actuated pump through the nozzle. Outside of the pipe the rubber ring sleeves with the mechanism of their extension are mounted, an anchor, a centraliser and a channel is made for tight wiring the power cable through the packer. In the wall of the pipe on both sides of the ring sleeves the radial holes are made and ring trapezoidal grooves symmetrically to them, connecting the pipe cavity with spaces between the pipes above and below the packer. The inner pipe diameter is smaller than the inner diameter of the column of pumping and compression pipes and towards the upper end of the pipe in the latter the inner cone of transition from the pipe diameter to the column diameter of pumping and compression pipes is made. On the inner side of the wall of the pipe a ring recess is made of the locking device for mounting in the pipe of removable cylindrical inserts designed to perform certain technological procedure of well operation of descending into the pipe through the cavity of the column of pumping and compression pipes and hermetically mounted in a pipe through the seals with the possibility of aligning and/or overlapping the ring trapezoidal grooves with radial holes in the pipe and in removable cylindrical inserts. In the pipe the removable cylindrical inserts can be mounted for technological operations of the procedure of operation of the well: washing the above-packer tubular annulus or washing the submersible electrically-actuated pump, or gas discharge from the under-packer tubular annulus, or oil extraction using submersible electrically-actuated pump and other removable inserts. The removable cylindrical inserts comprise the element of the retaining device interacting with mating ring recess on the inner side of the pipe wall, retaining the cylindrical insert in the pipe in a certain position, and an annular groove for engaging the removable inserts with the gripping tool for descending from the well surface to the pipe and removal them through the cavity of the column of pumping and compression pipes.
EFFECT: reduction of amount of tripping operations and downtime of the well.
7 cl, 5 dwg
