RU2794193C1 - Device for cleaning internal side of pipes - Google Patents

Abstract

FIELD: cleaning downhole pumping equipment.

SUBSTANCE: device includes a frame, a carriage with a drive, configured with the possibility of moving along the frame, a ramrod fixed on the carriage, the front end of which is equipped with a pipe cleaning nozzle, a system for feeding, holding and rotating the pipe on the frame. The ramrod is made hollow and compressed air is supplied through it to the cleaning nozzle for purging and removing waste in the area of cleaning the inner diameter of the pipes. The cleaning nozzle contains an adapter rigidly fixed to the ramrod, a hollow screw emerging from the adapter, the helical cleaning surface of which have an air supply nozzle and a tip fixed to the end of the screw containing an ultrasonic emitter capable of emitting with a frequency of 15-30 kHz. The pipe is made with the possibility of rotation on the frame clockwise. Ribs of the screw are cut counterclockwise.

EFFECT: device for cleaning the inner surface of the pipes.

3 cl, 2 dwg

Description

The present invention relates to installations for cleaning downhole pumping equipment, namely tubing (hereinafter tubing). The device is designed to remove sludge and salt deposits from the inner surface of the tubing previously washed from asphalt, resin and paraffin deposits (ARPD).

A device for cleaning the inner surface of pipes is known, see RF patent No. 190,597, dated 04.07.2019. This device contains roller bearings located on the frame, and a cleaning unit for the inner surface of the pipe, which is a piston with a hollow inner surface, including nozzles in the form of a rotating disk with hard rubber, a rotating disk with hard alloy scrapers, a rotating brush, a rotating nozzle for feeding steam that is fed into the nozzle through the inner hollow surface in the piston, and the piston through the axis of rotation is connected to an electric drive located on a movable carriage, the movement of which positions the piston inside the pipe in which the inner surface is cleaned. The disadvantage of this device is the insufficient speed and efficiency of cleaning the inner surface of the pipe, as well as the complexity due to the need to create means for rotating the nozzles.

The closest solution is a device for cleaning the inner surface of pipes, see RF patent No. 2181637 dated April 27, 2002. This device comprises a frame, a movable carriage, a rod fixed on it with a cleaning tool having a primary pen drill and knives with cutters, and a drive for communicating reciprocating motion to the cleaning tool. At the same time, the primary spade drill is made asymmetrical with cutting edges shifted by half the pipe feed step, and a flat spacer spring and steel brushes are placed between adjustable springy knives with cutters for final cleaning of the pipe surface. The disadvantage is the insufficient speed and efficiency of cleaning the inner surface of the pipe.

The objective of the invention is the possibility of reusing cleaned pipes.

The technical result is an increase in the efficiency of removing solid deposits on the inner surface of the pipe walls.

The technical result is achieved by the fact that the device for cleaning the inner surface of pipes includes:

- frame,

- a carriage with a drive, made with the possibility of moving along the frame,

- a ramrod fixed on the carriage, the front end of which is equipped with a pipe cleaning nozzle,

- a system for feeding, holding and rotating the pipe on the frame.

At the same time, the ramrod is made hollow and compressed air is supplied through it to the cleaning nozzle for purging and removing waste in the area of cleaning the inner diameter of the pipe. And the cleaning nozzle is made in the form:

- an adapter rigidly fixed on the ramrod,

- a hollow screw coming out of the adapter, on the helical cleaning surface of which at least one nozzle for air supply is fixed, and

- a tip attached to the end of the screw and containing an ultrasonic emitter.

The tip is preferably made in the form of a pen drill.

An ultrasonic emitter emits at a frequency of 15-30 kHz with an intensity of more than 0.1 W/cm2.

The rotation of the pipe on the frame is clockwise, and the ribs of the auger are cut counterclockwise or vice versa.

The device additionally contains a vacuum cleaner, the suction manifold of which is located on the end surface of the pipe and allows removing the cleaning products by the air flow generated from the nozzle nozzles.

The proposed device is shown in the attached figures 1-2 and consists of the following elements:

1, 2, 3, 4, 5, 6 - frame elements;

7 - clamp;

8 - clamp bracket;

9 - collector;

10 - lever;

11 - slope;

12, 13 - translator;

14 - support rollers;

15 - rollers of the pipe rotation drive;

16 - intake manifold;

17.18 - pneumatic cylinder;

19 - emphasis;

20 - tensioner;

21 - ramrod;

22 - carriage;

23 - bracket;

24 - tension rope bracket;

25 - sprocket assembly;

26 - roller;

27 - bridge;

28 - nozzle;

29 - collector drive;

30 - bracket;

31, 32 - motor reducer;

33 - industrial vacuum cleaner;

34 - nozzle adapter;

35 - nozzle auger;

36 - adjustable nozzles for air supply;

37 – nozzle tip;

38 - ultrasonic emitter.

The first component of the installation for cleaning the inner surface of the tubing (figure 1) is designed to move the carriage with a ramrod, a cleaning nozzle and is a prefabricated welded structure and consists of the following assembly units: frame 1, frame 2, drive frame ramrod 5, carriage 22 , ramrod 21, brackets 23, rollers 26, tension rope bracket 14, sprocket assembly 25, nozzles 28, gear motor 31.

The frame of the prefabricated structure has three sections 1, 2, 5. Each section is made of a profile pipe resting on racks. At the bottom, the racks are connected by cross braces, on which there are support plates with holes for attaching to the foundation. The carriage 22 moves along the frame on the flanged rollers. On the carriage, on the rack, the ramrod 21 is rigidly fixed. Brackets 23 with rollers 26, which are the guides of the ramrod, are fixed on the frame. The ramrod 21 is hollow made of a pipe. Compressed air is supplied from the side of the carriage using a tube to the cleaning rod to purge and remove waste from the cleaning zone of the inner diameter of the pipe. A cleaning nozzle 28 is screwed onto the free end of the cleaning rod. Each type of tubing diameter has its own cleaning nozzle.

On the body of the nozzle 28, see figure 2, adjustable nozzles for supplying air 36 (there may be four) for purging the pipe are made. Also on the tip 37 of the nozzle 28, see figure 2, an ultrasonic emitter 38 is installed. The body of the nozzle is made in the form of a screw 36. The attachment of the nozzle 28 to the ramrod 21 is carried out through the adapter 34 by means of a threaded connection, followed by fixation from screwing.

The carriage 22 with the ramrod 21 moves along the frame with a chain placed in the channel grooves of the frame, on the drive and non-drive sprockets. The carriage chain drive consists of a 31 gear motor mounted on a movable plate and a chain drive. The end positions of the carriage are adjusted using limit switches. Along the frame from the side of the carriage 22, on tensioned cables, there is a tube for supplying compressed air to the ramrod 21.

The second component of the installation for cleaning the inner surface of the tubing (Fig. 1) is intended for shifting the tubing onto idle support rollers 14, pressing the tubing against the rollers of the pipe rotation drive, cleaning the inner surface of the tubing, shifting the tubing onto the ramp and is a prefabricated-welded structure and consists from the following assembly units: frame 3, frame 4, clamp frame 6, clamp 7, clamp bracket 8, collector 9, lever 10, slope 11, transferr 12, transferr 13, roller support 14, pipe rotation drive rollers 15, collector suction 16 , the pneumatic cylinder of the tubing transfer switch 17, the pneumatic cylinder of the tubing clamp 18, the stop 19, the tensioner 20, the bridge 27, the collector drive 29, the motor-reducer 32, the industrial vacuum cleaner 33.

Principle of operation

Starting position of the installation for cleaning the inner surface of the tubing: there are no pipes on the installation, the carriage is in its original position, a cleaning nozzle is screwed onto the ramrod, corresponding to the inner diameter of the pipes being processed and fixed with screws; the loading mechanism lever is in the lower position and the unloader lever is in the upper position, the pressure rollers of the internal cleaning unit are in the upper position.

The pipe from the tubing external cleaning unit moves along the roller table to the internal cleaning unit.

The pneumatic distributor that controls the operation of the pneumatic cylinder is turned on, compressed air from the pneumatic block through the pneumatic distributor is supplied to the rodless cavity of the pneumatic cylinder, the transfer levers lift the pipe from the roller bearings of the receiving roller table, the pipe rolls off the transfer levers onto the roller bearings of the installation.

When the pipe has taken the position of internal cleaning (located on the non-driven support rollers and rollers of the tubing rotation drive), the pneumatic distributor is turned on and compressed air from the pneumatic block enters the rodless cavity of the pneumatic cylinder, the pressure rollers are lowered. After clamping the pipe, the pipe rotation drive is turned on. The pipe begins to rotate on the support rollers.

After turning on the pipe rotation drive, the carriage drive is turned on, the carriage, the ramrod and the cleaning nozzle along the guides begin to move towards the pipe, the pneumatic distributor is turned on, supplying compressed air to blow the pipe. This turns on the ultrasonic emitter 38 with an ultrasonic frequency of 15-30 kHz, ultrasonic treatment of asphalt-resinous-paraffin deposits and hydrates is carried out with an intensity of more than 0.1 W/cm2.

The cleaning nozzle enters the rotating tube - the inner surface of the tube is cleaned. The body of the nozzle 28 is made in the form of an auger 35, the ribs of which, when the pipe rotates, clean deposits inside the tubing due to the fact that the auger ribs are directed in the opposite direction of rotation. Compressed air is supplied to purge the pipe through the ramrod 21, nozzle adapter 34 and hollow auger 35, from where it enters adjustable nozzles 36, the diameter of which can be selected depending on the required purge speed.

The carriage reaches the end point, the carriage drive is reversed and the carriage, cleaning rod and cleaning head begin to move in the opposite direction.

When the carriage reaches its initial position, the ramrod drive, pneumatic distributor (pipe purge), and pipe rotation drive are switched off.

After turning off the pipe rotation drive, the pneumatic distributor is turned off, compressed air from the pneumatic block enters the rod end of the pneumatic cylinder - the pressure rollers rise.

After lifting the pressure rollers, the pneumatic distributor is activated, compressed air is supplied from the pneumatic unit to the rod end of the pneumatic cylinder, the transfer levers are lifted, the tube from the transfer levers enters the ramps, the unit is unloaded onto the roller table.

The cleaning process occurs by reciprocating movement of the ramrod along the axis of the pipe during its clockwise rotation, while the screw ribs are cut counterclockwise, which allows you to effectively remove solid deposits on the inner surface of the pipe walls. The use of an ultrasonic sensor with an ultrasonic emitter with a frequency of 15-30 kHz makes it possible to clean the inner surface of pipes mechanically with the removal of deposits up to 95%.

Thanks to adjustable nozzles, cleaning products are removed by a directed air flow generated from the tip of the ramrod to the suction of the vacuum cleaner 33.

Claims (6)

1. A device for cleaning the inner surface of pipes, including a frame, a carriage with a drive made to move along the frame, a ramrod fixed on the carriage, the front end of which is equipped with a pipe cleaning nozzle, a system for feeding, holding and rotating the pipe on the frame, characterized in that The ramrod is made hollow and compressed air is supplied through it to the cleaning nozzle for blowing and removing waste in the area of cleaning the inner diameter of the pipe, while the cleaning nozzle contains: - an adapter rigidly fixed to the ramrod, - a hollow screw coming out of the adapter, on the helical cleaning surface of which at least one nozzle for air supply is fixed, and - a tip fixed at the end of the screw and containing an ultrasonic emitter capable of emitting at a frequency of 15-30 kHz, while the pipe is rotatable on the frame clockwise, and the screw ribs are cut counterclockwise. 2. The device according to claim 1, characterized in that the tip is made in the form of a pen drill. 3. The device according to claim 1, characterized in that the device additionally contains a vacuum cleaner, the suction manifold of which is located on the end surface of the pipe and allows you to remove cleaning products with an air stream generated from the nozzle nozzles.

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