RU28172U1 - DEVICE FOR CLEANING INTERNAL CAVITY OF PIPES FROM PARAFFIN AND OTHER DEPOSITS - Google Patents

Description

Device FOR cleaning the internal cavities of pipes from paraffin and other deposits

The utility model relates to the oil and gas industry, in particular, to devices for cleaning tubing from paraffin and other deposits.

A device for cleaning the internal cavity of the pipes from paraffin and other deposits, containing mounted on the shaft with the possibility of free rotation, at least the upper and lower cleaning heads with oppositely directed cutting elements, a spacer stabilizer installed between the cleaning heads, a stabilizing guide fixed to the upper part of the shaft, the load and the node connecting to the traction body, and the device is equipped with a rod connected to the guide stabilizer having a spherical end the element, and a sleeve connected to the load with an internal support protrusion, the spherical element being located in the sleeve with the possibility of limited axial movement and interaction with its internal support protrusion, the sleeve has a conical bore in the lower part, a shaft in the lower part 6 Е21 В 37 / 02

an annular protrusion, and the lower cleaning head is made conical and covers the annular protrusion of the shaft. The lower treatment head has a maximum cross-sectional dimension less than the corresponding maximum size of the upper treatment head. The device can be equipped with an additional section with at least two treatment heads, made with the possibility of integration between the sleeve and the load. (RF patent No. 2089719, Е 21 В 37/02, publ. 09/10/97, bull. No. 25).

A disadvantage of the known device is the braking of the load on the pipe wall when it hangs on the deposits, during descent, when the swivel tends to fold, and the cavity where the ball protrusion moves is clogged by the remains of the deposits. The efficiency and quality of cleaning the inner surface of the pipes is reduced.

The closest known device is for cleaning the internal cavities of pipes from paraffin and other deposits

containment; its body, a cleaning head with cutting edges, made integral with the impeller mounted on the shaft with rotation, a connection unit to the traction body, fixed in the upper part of the body and a stabilizer, the stabilizer being made in the form of longitudinal protrusions located on

the housing, each of which has a sharp edge at the apex and two lead-in sections at the ends of the protrusion, a mechanism is fixed in the cleaning head that ensures that the cleaning head rotates unidirectionally only in one direction, and a bearing is installed between the housing and the connection unit to the traction unit. (Certificate of the Russian Federation No. 11261, Е21 В 37/02, publ. 16.09.95, bull. No. 9).

In the known device, during descent, when hovering on deposits, all the force from the scrapers is transferred to the load in its lower part. The load tends to cling to the wall. There is a load braking force on the pipe wall, reducing the force of the impact of scrapers on the deposits. The efficiency and quality of cleaning the inner surface of the pipes is reduced.

The objective of the utility model is the effective cleaning of the inner surface of pipes from paraffin and other deposits with high density.

The technical result achieved by the implementation of the claimed device is to increase the reliability of cleaning deposits with high density.

The problem with the achievement of the technical result is solved by the fact that the device for cleaning the internal cavities of the pipes from paraffin and other deposits, containing at least two

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sections consisting of cleaning heads with cutting edges installed with the possibility of free rotation on the axis, as well as a node connecting to the traction body and the load. One section is mounted on the load from the opposite side from the attachment to the traction unit, according to a utility model, part of the sections consisting of cleaning heads with cutting edges mounted with the possibility of free rotation on the axis is located between the connection to the traction unit and the load. It contributes to the solution of the problem that the section mounted on the load on the opposite side from the connection unit to the traction body contains one cleaning head, and the section fixed on the load on the opposite side of the connection unit to the traction body contains cleaning heads with a smaller diameter, than the rest of the treatment heads.

The figure 1 shows the proposed device.

The device consists of a load 1, lower 2 and upper 3 sections of the cleaning heads 4 with cutting edges 5 mounted on bearings 6 on the axis 7. The lower section 2 is mounted under the load 1. The upper section 3 is mounted on top between the load 1 and the unit 8 connecting to the traction organ - wire 9. The lower section 2 should be lightweight, and may contain one cleaning head 4. It is possible that the lower cleaning head can be performed with

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smaller outer diameter than the treatment heads of the upper section 3.

The device operates as follows. With the buffer valve closed, the device is placed in a lubricator. Lubricator is sealed. The buffer valve is opened, and by means of the traction organ of the wire 9, the device is lowered into the pipe string. The sharp edge of the cleaning head 4 of the lower section 2 cuts into dense deposits and forms a grid of spiral grooves in them. The cleaning head 4 rotates only due to the interaction of the cutting edges 5 and deposits.

The resistance to moving the device down is minimal, since there is only one cleaning head at the bottom, and, as an option, it may have an underestimated outer diameter. The lower head violates the integrity of the deposits. The incoming flow of well products erodes the grooves and removes the separated parts. The upper section of the treatment heads cuts into a partially destroyed deposit and also cuts a grid of spiral grooves in it. Since the load is located below the upper cleaning head, and the lower cleaning head further centers it relative to the pipe string, the load cannot be braked against the pipe walls. The speed of lowering the device into the well increases.

When moving the traction body - wire 9 up, the cutting edge 5 cuts off the remnants of dense deposits. The flow passing through the grooves between the sharp edges 4, carries the products of cutting.

By lowering and raising the device to the required depth, they clean the inner surface of the pipes.

If necessary, to increase the diameter of the passage channel in the pipes, this operation can be repeated with a device in which the diameter of the treatment heads has a larger value.

This embodiment of the device allows you to reliably operate it at a high density deposits. Increases the performance of the device by increasing the speed of its descent.

Claims (3)

1. A device for cleaning the internal cavities of pipes from paraffin and other deposits, containing at least two sections, consisting of cleaning heads with cutting edges mounted with the possibility of free rotation on the axis, as well as an attachment unit to the traction body and cargo, with one section fixed on the load on the opposite side of the attachment to the traction body, characterized in that the part of the sections consisting of cleaning heads with cutting edges mounted with the possibility of free rotation on the axis, and between the node connection to the pull body and the load.  2. The device according to claim 1, characterized in that the section mounted on the load on the opposite side of the connection unit to the traction body, contains one cleaning head. 3. The device according to claim 1, characterized in that the section mounted on the load on the opposite side from the connection unit to the traction body, contains cleaning heads with a smaller diameter than other cleaning heads.