RU16520U1 - SCRAPER-PLUNGER FOR CLEANING THE INNER CAVITY OF PIPES FROM PARAFFIN AND OTHER DEPOSITS - Google Patents

Abstract

1. Scraper-plunger for cleaning the internal cavities of pipes from paraffin and other deposits, comprising a housing and at least two treatment heads with sharp edges on the outer surface and grooves between them mounted on the shaft with the possibility of rotation and with the possibility of free movement in the axial direction of one from the heads, characterized in that the part of the body under the treatment heads is made in the form of a plunger having a gap labyrinth seal in the gap with the walls of the pipes, a channel for the passage of well production and a fixed valve torus, the ends of treatment heads directed towards each other are made of alternating ridges and troughs, with their vzaimodeystviya.2. A plunger scraper according to claim 1, characterized in that the sharp edges of the treatment heads are made on a helical surface and are oppositely directed. A scraper-plunger according to claim 1, characterized in that the sharp edges on one cleaning head are made on a helical surface, and on the other cleaning head - longitudinal. The scraper-plunger according to claim 1, characterized in that at least one additional cleaning head is installed under the plunger.

Description

Scraper-plunger for cleaning the inner pipe toes 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 when using plunger lift technology for oil and gas production.

A device for cleaning internal pipe cavities from paraffin and other deposits, comprising a housing, a cleaning head with sharp edges and grooves between them, mounted on the shaft with the possibility of rotation, a stabilizer mounted in the upper part of the housing, 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, and a mechanism is fixed in the treatment head that ensures that the treatment head rotates in only one direction, and The device, which ensures the unimpeded rotation of the cleaning head in only one direction, can consist of a washer on which brake elements are mounted fixed on the shaft, and the distance from the upper end of the shaft to the washer exceeds the length of the cleaning head, which can freely move in axial directions the amount of clearance. (Certificate for utility model No. 11261, Е 21 В 37/02, publ. 16.09.99, bull. No. 9).

The problem being solved by a utility model is the cleaning of tubing from paraffin and other deposits using plunger lift technology for oil and gas production.

go o ° 1

E21 B 37/02

The technical result achieved by the implementation of the claimed device is to improve the quality of cleaning deposits with high density in the absence of a traction body.

The task with the achievement of the specified technical result is achieved due to the fact that in the known device for cleaning the internal cavities of pipes from parafs and other deposits, containing a housing and at least two treatment heads with sharp edges on the outer surface and grooves between them mounted on a shaft with the possibility of rotation and with the possibility of free movement in the axial direction of one of the heads, according to the proposed utility model, part of the body under the cleaning heads is made in the form of a plunger ra having a slit gap in the labyrinth seal with the walls of the pipes, for the passage of the channel and wells produkschsh valve with a clamp, the ends of treatment heads directed towards each other are formed chereduyupschesya protrusions and depressions, with IR interaction.

Additional embodiments of the device are possible in which it is advisable that:

the sharp edges of the treatment heads were made on a helical surface and oppositely directed;

sharp edges on one cleaning head were made on a helical surface, and on the other cleaning head - longitudinal;

at least one additional treatment plant was installed under the plunger.) 1ovka.

The figure 1 shows a plunger scraper during the descent into the cleaned pipe string.

The figure 2 shows a plunger scraper when lifting in a cleaned pipe string.

The device consists of a housing 1 and at least two treatment heads 2 and 3, on the outer surface of which sharp edges are made

4 and 5. The sharp edge 4 is made along a helical line. The sharp edge 5 can be performed either along a helix in the opposite direction, or in a straight line along the axis of rotation. Between the edges are grooves 6 and 7 for the passage of flow (oil, gas). Cleaning heads 2 and 3 are placed on the shaft 8 with the possibility of rotation. The cleaning head 3 is placed with the possibility of movement along the axis of the shaft. On the outer surface of the housing 1 there is a labyrinth seal made in the form of a set of washers 9. In the housing there are: a channel for the passage of fluid 10, a valve 11 and a latch 12. At the ends of the cleaning heads 2 and 3, alternating protrusions 13 and depressions are made towards each other 14.

A scraper plunger for cleaning the internal cavities of pipes from paraffin and other deposits works as follows.

With a closed buffer valve, the device is placed in a lubricator. The lubricator is sealed. The latch 12 holds the valve 11 in the open position. The flow well of the well is closed. The buffer valve opens and under the own weight of the scraper-plunger it is lowered into the pipe string 15. The fluid passes through channel 10. Washers 9 are deformed and do not affect deposits. Sharp edges 4 and 5 cut into deposits. The cleaning head 3 is shifted to the upper shoulder 16 of the shaft 2. The protrusions 13 and the depressions 14 disengage and begin to rotate independently of each other. When the cutting edges 4 and 5 come in contact with loose deposits, the process of cutting off these deposits occurs.

When the cutting edges come into contact with dense deposits, the flow energy is not enough to complete the cutting work, and the head stops. Under the influence of gravity, the sharp edges 4 and 5 of the treatment heads 2 and 3, cut into deposits and form a grid in it either from oncoming, intersecting helical grooves, or from intersecting helical and longitudinal grooves. When the plunger scraper falls down, the treatment heads rotate only due to the interaction of sharp edges 4 and 5 and deposits. In the lower part of the pipe string, the scraper plunger abuts against the stop valve 11, the channel 10 is blocked. At the opening of the flow line of the well, the gas flow with oil rushes up through the pipes 15. The technology of plunger oil and gas production is being implemented. Due to the pressure drop in the labyrinth seal, the scraper-plunger begins its upward movement. When this cleaning head 3 is shifted down to contact with the cleaning head 2. The protrusions 13 interact with the depressions 14 and prevent the rotation of the treatment heads. The sharp edges 4 and 5 begin to cut off the dense deposits. The flow of gas passing through the grooves 6 and 7 between the sharp edges 4 and 5, carries the products of cutting. Upon reaching the lubricator, the thrust built into it (not shown in the drawing) opens the valve 11.

Periodically, due to the closure and opening of the flow line of the well, they lower and raise the plunger scraper.

This embodiment of the device allows you to reliably operate it using plunger lift technology for oil and gas production.

Claims (4)

1. Scraper-plunger for cleaning the internal cavities of pipes from paraffin and other deposits, comprising a housing and at least two treatment heads with sharp edges on the outer surface and grooves between them mounted on the shaft with the possibility of rotation and with the possibility of free movement in the axial direction of one from the heads, characterized in that the part of the body under the treatment heads is made in the form of a plunger having a gap labyrinth seal in the gap with the walls of the pipes, a channel for the passage of well production and a fixed valve torus, the ends of treatment heads directed towards each other are made of alternating ridges and troughs, with their interaction.  2. The scraper-plunger according to claim 1, characterized in that the sharp edges of the treatment heads are made on a helical surface and are oppositely directed.  3. The scraper-plunger according to claim 1, characterized in that the sharp edges on one cleaning head are made on a helical surface, and on the other cleaning head - longitudinal. 4. The scraper-plunger according to claim 1, characterized in that at least one additional cleaning head is installed under the plunger.