RU2713825C1 - Near-bit chopper of slurry - Google Patents

Abstract

FIELD: soil or rock drilling; mining.

SUBSTANCE: invention relates to drilling of deep wells, namely to near-bit chutes of slurry. Proposed device comprises shaft, screen, rotor and baffle. Shaft is made integral with flange and single-stage vane pump. Device is equipped with a net having a lower cover provided with branch pipes, a top cover, which inner surface has grooves and forms a single-stage mill with the upper surface of the flange having grooves. Covers have holes, shaft is installed through these holes.

EFFECT: improving operating efficiency and reliability of the device.

1 cl, 4 dwg

Description

The invention relates to the field of drilling deep wells, and in particular to supra-bit slurry grinders.

A device [1] is known that is used to clean a clay solution from sludge. The disadvantage is that the device is used to clean the solution in the ground version.

A device [2] is known for grinding sludge above a chisel. The disadvantage is that the crushed solution does not pass through the grid.

The purpose of the invention is to increase the operating efficiency and reliability of the device due to the improvement, design and equipment of the shaft, nozzles and improvement of the vibration scheme, supplying a suction pipe, mill for crushing sludge to virietsa mesh.

This goal is achieved in that the device has a flange, an elongated rotor, a single-stage vane pump, a mesh having a lower cover provided with nozzles, side working surfaces and a upper cover whose inner surface has grooves, forms a single-stage mill with the upper surface of the flange, the upper and lower covers have holes whose diameter is two millimeters larger than the diameter of the shaft on which the mesh is installed, the bottom cover is attached to the mesh using a threaded connection.

A significant difference is the supply of the shaft with a flange, which together with the cover of the grid form a single-stage mill, an increase in the length of the rotor increases the volume of the solution pumped through the grid, the vibration of the grid improves: vertical vibrations arise due to the vibration of the grid from friction of the top cover of the flange, the excitation of torsional vibrations from the liquid being ejected rotor. Installing nozzles on the bottom cover improves sludge absorption.

In FIG. 1 shows the design of the slurry grinder.

The device consists of a shaft 1, made at the same time with a flange 2, a single-section vane pump 3 and a rotor 4, equipped with a grid 5 having a top cover 6 and a bottom cover 7, a suction pipe 8, a grid baffle 11, the hole Yu. The grid is mounted on a shaft with a gap of 2 mm. The bottom cover is connected to the net using a threaded connection.

In FIG. 2 shows a top view of a flange which with a grid cover 6 forms a single-stage mill.

In FIG. H shows the cross section of the working part of the grinder, i.e. the working part of the grinder rotor 4, mesh 5, bump 9. View In the inner working surface of the mesh. In FIG. 4 shows the bump grooves.

The device operates as follows. The shaft of the sub 1 is connected to the shaft of the downhole motor or the layout of the rotary drilling tool. The bit connects to sub 14. During drilling, fine cuttings are carried to the surface with flushing fluid. Coarse sludge accumulates at the bottom due to the rotation of the shaft by the downhole motor, the vane pump sucks the sludge into the cavity of the sludge grinder. The rotor blades discard the sludge onto the chippers 9 and, due to the impact and pressing by the rotor blades, the sludge is crushed and discarded through the net. Due to hydraulic forces, the mesh constantly makes circular motions. The nozzles 8 are used so that the pumps suck the sludge closer to the destruction zone.

The upper part of the flange and the lower part of the upper cover work as a single-stage mill. For this, the upper surface of the flange and the lower surface of the mesh are provided with protrusions and depressions, for sucking the sludge into the destruction zone, an opening 12 is provided.

Sources

1. Ilsky A.L. Calculation and design of drilling equipment and tools textbook for universities / A.L. Ilsky. - Moscow: Gostoptekhizdat, 1962.

2. Device for drilling wells. Author's certificate. USSR No. 1571202 SU 1571202 A1 Е21В 21/00. Authors M.S. Gabdrakhimov, B.Z. Sultanov, A.S. Galeev and M.Ya. Habibullin.

Claims (1)

Supraslot cutter of sludge, including a shaft, mesh, rotor, chipper, characterized in that the shaft is integral with the flange and a single-stage vane pump, the device is equipped with a mesh having a lower cover, equipped with nozzles, an upper cover, the inner surface of which has grooves and forms with the upper the surface of the flange having grooves, a single-stage mill, the covers have holes, a shaft is installed through these holes.

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