SU1585132A1 - Arrangement for working internal surfaces of parts - Google Patents

Abstract

The invention relates to devices for improving the corrosion resistance of the inner surface of casing oil and injection wells. The purpose of the invention is the expansion of technological capabilities by processing casing. A boom 4 is fixed to the housing 1 with radial holes connected to the nozzles 9 of the impeller 6. The nozzles 9 are located at an angle α to the axis of rotation and at an angle β to the radius. The turbine has a cup-shaped permeable pan 11 and a net catcher 12, which has sector troughs located along the axes of the nozzles 9. Elastic reflectors 15 are mounted on the rod, which form a closed volume with the catcher 12, where the working agent is placed in the form of a fraction. When a energy carrier, such as oil, is fed into the hollow rod 4, the impeller 6 is set in motion due to the reactive force of the jet emanating from the nozzles 9. In this case, the energy carrier draws the shot in the chutes and directs it to the pipe walls 14 at high speed hardening the surface and, reflecting from the wall, falls under the action of its own mass on the safety device 12, then rolls down into the trough under the jet of energy. The cycle is repeated. 1 il.

Description

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The invention relates to devices for treating and improving the corrosion resistance of the inner surface of casing strings of oil and injection wells.

The aim of the invention is the expansion of technological capabilities by providing processing of casing strings.

FIG. 1 shows the device, a general view; in fig. 2 is a section A-A in FIG. one.

i The device consists of a case 1s in the upper part of which there is a thread 2 for coupling with pump-compressor pipes 3 (tubing), and from the bottom part a rod 43 is perforated with holes 5. On the rod 4 the turbine 6 is mounted with the possibility of rotation s resting with the bottom end

The bearing 75 and is sealed to the top by i (rings 8.

I The impeller 6 along the generatrix is equipped with nozzles 9 located at an acute angle o (to the axis of rotation and at an angle to the radius and connected to the strip 105 formed by the outer surface of the rod 4 and the inner surface of the impeller 6.

On the impeller b, a cup-shaped permeable pan 11 and an annular mesh catcher 12 are fixed, which; sector spans 13 along the nozzle axes are located; the catcher 12 with its peripheral edge rests on the side of the pan 11 with the inner surface of the casing 12 pipes 14.

On the housing 1 are located the reflectors 15 of the elastic cantilever plate 16 of solid material, for example. Of spring steel and elastic petals 17 arranged relative to the plates 16 in a checkerboard pattern,

Reflectors 15, the inner surface of the casing pipe G 14 and the safety device 12 form a closed volume, where the working agent is placed in the form of a fraction 18) of solid material, such as hardened steel, while the diameter of the fraction 18 should be slightly larger than the mesh of the catcher 12.

The device works as follows.

The device is introduced into the casing and is set in its original position, for example, at the wellhead. Then, through the STC under high pressure.

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energy is pumped into the device — working fluid, such as oil, which, when passing through the internal channel of housing 1, through holes 5 and cavity 10 flows through nozzles 9 in the direction of the casing wall along the grooves 13. After flowing through nozzles 9, the working fluid drags working material in the form of a shot 18, which is present in the grooves, hurls it towards the pipe wall 14 at high speed. Striking the pipe 14, the shot 18 produces surface hardening and, reflected from the wall, falls under its own weight on the safety device 1 2, and then rolls into the grooves 13 under the outflowing fluid. The cycle is repeated.

Since the nozzles 9 are installed tangentially, the turbine 6 rotates under the action of the reactive force of the working fluid flowing through them, thereby ensuring a uniform surface treatment around the perimeter of the casing 14.

Claims (1)

The use of the device allows hydromechanically to remove damaged surface layers of the casing, and then create compressive stresses in the metal in the surface layer, preventing its corrosion, heal surface microcracks, and eliminate near-surface defects. Invention Formula A device for treating the inner surface of the parts, comprising a hollow rod with radial holes designed to supply energy carrier and connected with the nozzles of the impeller mounted on it, and means for delivering the working agent, which is technological capabilities by allowing the processing of casing strings, the device is equipped with an elastic reflector mounted on a hollow rod and intended to come into contact with the surface to be treated, and the agent is mounted on the impeller and is made in the form of a net catcher with sectoral grooves located opposite each impeller nozzle and also intended for the interaction of the peripheral part with the surface to be treated. 13 6 FIG. 2