RU33396U1 - Well Cleaning Device - Google Patents

Description

02 / 174-1 about 0. 3,. 3

Well Cleaning Device

The claimed technical solution relates to a means of cleaning wells from solid bulk materials (mechanical impurities): sand, clay, scale, small foreign objects, pieces of metal and cable. The device can be used in the oil industry for wells whose operation is complicated by the accumulation of heavy heavy sediments at the bottom.

During well operation and repair work, accumulation of mechanical impurities at the bottom and in the bottomhole formation zone occurs. This leads to overlapping filtration holes through which oil enters the well, reducing well productivity and reducing oil production. Dry; There are various methods and devices for removing mechanical impurities.

A device for cleaning wells is known, comprising successively installed tubing string (LHT), a drain valve, a storage container and a cylinder with a hollow piston, a hollow piston connected to the storage container and ring seals and side openings for the passage of fluid and is installed in the cylinder on the middle elements, and the cylinder is connected to the shank, having one; a check valve (Patent RU JV22160825, FIG. 2, IPC Е21В 37/00, publ. 20.12.2000).

The known device is ineffective when used with the aim of destroying and lifting densely pressed deposits and small metal objects due to the low throughput gap between the shank and the piston and holes in the piston.

The technical result of the proposed device is to increase the efficiency of the known device for removing densely compressed deposits and heavy particles from the bottom of the well and the bottomhole formation zone.

The technical result is achieved by the fact that the device for cleaning wells containing sequentially installed string of pump and compressor pipes (1ЖТ), a drain valve, a storage container and a cylinder with a piston, as well as a check valve and a liner, is equipped with a push rod, the upper part of which is located in the cylinder with the possibility of interaction with the piston, and the bottom is connected to the shank, and the storage container is connected to the cylinder.

In addition, it is advisable that the piston in the initial state was fixed in the cylinder using fasteners with the possibility of cutting them under the action of a weight of 1

In addition, o-rings can be installed on the piston.

In addition, the stroke limiter of the push rod can be installed in the cylinder.

The drawing shows a diagram of the proposed device.

A device for cleaning a well comprises a tubing string 1 connected to a storage container 2 of mechanical impurities. A drain valve 3 is installed between them. In the cylinder 4, rigidly connected to the storage container, a piston 6 (plunger) is mounted on the fixing bolts 5. The dimensions (diameter) and the number of bolts 5 are calculated in advance based on the estimated weight of the tubing string 1 and the back pressure in the well. Between the inner surface of the cylinder 4 and the outer surface of the piston 6, rubber sealing rings 7 are installed at the location of the latter, hermetically separating the inner cavity of the container 2 from the inner cavity of the push rod 8, the upper part of which is located in the cylinder 4, and the lower one is rigidly connected to the shank 9 ( "Pen" through the check valve 10. A stroke limiter 11 is fixed on the cylinder 4, and a stop 12 is mounted on the pusher pipe 9. When the device moves downward, the fasteners are cut off by the weight of the column of pumping pipes 1 due to the pressure difference between the well and the internal cavity of the pump-compressor pipes, the bolts 5 and the piston 6 are pushed into the container 2 by the pusher pipe 8.

The pusher pipe 8, rigidly connected with the shank 9, resting on the bottom, during the movement of the tubing remains stationary. The container 2 with the cylinder 4 move down to the stop of the restrictive stroke 11 at the stop 12 on the pipe-pusher 8.

Through the cavity of the pusher tube 8, the fluid flow together with the heavy particles rushes into the container 2. In the process of pressure equalization, the check valve 10 closes, and the device, together with the trapped mechanical impurities, rises to the surface. To facilitate lifting, the drain valve 3 is first opened, and fluid from the tubing flows into the well.

This device can also be effectively used in production and injection wells for cleaning heavy pressed mechanical impurities and the bottomhole formation zone, due to the large throughput of the pusher pipe, which allows capturing large volumes of fluid with a large number of heavy particles.

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Claims (4)

1. A device for cleaning wells, containing sequentially installed tubing string (tubing), a drain valve, a storage container and a cylinder with a piston, as well as a check valve and liner, characterized in that it is equipped with a pusher pipe, the upper part of which located in the cylinder with the possibility of interaction with the piston, and the bottom is connected to the shank, and the storage container is connected to the cylinder. 2. The device according to claim 1, characterized in that the piston in the initial state is fixed in the cylinder using fasteners with the possibility of cutting them under the influence of the weight of the tubing. 3. The device according to claim 1 or 2, characterized in that the sealing rings are installed on the piston. 4. The device according to any one of claims 1 and 2, characterized in that the stroke limiter of the pipe-pusher is installed in the cylinder.