FIELD: oil and gas industry.
SUBSTANCE: invention relates to a two-packer arrangement of an oil production unit with insulation of casing pipe leakages. Two-packer arrangement of the oil production unit with insulation of casing string leakage seals comprises successively lowered on the elevator tubing string and an electric submersible pump installed in the well with a power cable from the control station, two packers with cable entry, isolating pipe leakages in a certain interval of the casing, two columns of pipes of larger and smaller diameters forming an annular cavity for releasing the gas cap from the annulus below the lower packer into the annulus above the upper packer through the radial channels of the crossflow sleeves disposed below and above the packers, respectively, hermetically sealed by central channels with a string of pipes of smaller diameter for lifting oil to the surface, hermetically sealed by a stuffing box coupling connected to an electric drive pump. Lower packer is made with a supporting anchor device. Column of pipes of smaller diameter with the upper end is movably connected to the central channel of the upper clutch of the cross flow, provided with an epiploon, with possibility of axial displacement of the end of the column beyond the end of the cross-flow coupler to a length at least equal to the compensation value of the positioner error of the packers isolating pipe leakages in a certain interval of the casing string. On the side of the nipple of the stuffing box sleeve, a smaller diameter pipe string is provided with a centralizer for assembling the pipes in a column for lifting oil to the surface.
EFFECT: technical result is increase in reliability.
1 cl, 1 dwg
