RU73943U1 - PIPELINE INTEGRITY CONTROL DEVICE - Google Patents

Abstract

The utility model relates to pipeline transport, in particular to the operation of pipelines, and is intended to identify places of narrowing of the flow area, the condition (absence) of internal coatings, unauthorized taps in the pipeline, leaks (leaks). It also relates to measuring equipment and can be used when testing pipelines under construction for the purpose of determining defects in the internal coating and their positioning on the pipeline.

The utility model is based on the task of improving the quality of the internal surface of the pipeline and improving the quality of operation by diagnosing the internal section of the pipeline for defects

- narrowing of the bore, deposits, changes in the diameter of the pipe, the presence of unauthorized taps, leaks, the presence of sections without internal anti-corrosion coating.

The problem is solved by a device for monitoring the integrity and cross-sectional area of the pipeline, consisting of a pipeline, plug, pressure gauge, piston, centrifugal pump unit. In the first variant of diagnosis, there is additionally a sealant on the plug and a drum with a wire and a wire flow recorder, and in the second variant

- position indicator and global positioning device.

In the claimed technical solution, the piston is made elastically deformed, and its working diameter corresponds to the inner diameter of the pipeline, and the annular cavity is sealed at the end of the pipeline with a plug with a sealant. To pump fluid into the diagnosed pipeline, a nozzle is inserted.

The diagnosis of the pipeline is carried out by skipping an elastically deformed piston in the pipeline under pressure, while the centrifugal pump unit operates with a constant engine speed

and with a fixed position of the butterfly valve. By changing the pressure up or down and with the binding of these pressure surges along the length of the pipeline, anomalies of the internal section of the pipeline are determined. An increase in pressure indicates a narrowing of the passage section of the pipeline (deposits, deformation of the inner coating, etc.), and a decrease in the increase in the diameter of the pipe, the absence of an inner coating, the presence of cuts or leaks. The magnitude of the pressure drop determines the size of the anomalies. With the second option, it is possible to diagnose a pipeline of any length. It should be noted that the installation adopted for the prototype determines the leakage of the pipeline only for small lengths.

Using this utility model will allow to determine the location of pipeline defects, to carry out their preventive repairs, which in turn will lead to lower operating costs, energy costs due to the elimination of narrowing sections of the pipeline, the number of failures, losses of transported liquid due to finding unauthorized taps and leaks, and also allows you to comply with environmental requirements.

The integrity and cross-section of the pipeline is controlled by a non-destructive method, without excavation and violation of the integrity of the pipe.

The positive aspects of this device are the simplicity of design, the ability to use existing equipment, low operating costs, since the integrity and cross-sectional control device is made of materials compatible with the transported medium and is widely used in the petrochemical and oil and gas industries.

The proposed utility model combines many of the capabilities of the above devices and when working with this device does not require highly qualified staff.

The pipeline integrity and cross-sectional control device allows to ensure reliable determination of defective sections where pipeline failures can occur. It not only detects the presence of a defective area, but also determines its specific location and the nature of the defect.

Description

The utility model relates to pipeline transport, in particular to the operation of pipelines, and is intended to identify places of narrowing of the flow area, the condition (absence) of internal coatings, unauthorized taps in the pipeline, leaks (leaks). It also relates to measuring technique and can be used in testing pipelines under construction for the purpose of determining defects in the internal coating and their positioning on the pipeline.

Prerequisites for creating a utility model.

Analysis of the current level of technology in this field showed the following.

A device is known for detecting, sizing and registering the location of defects and obstructions protruding inwardly in a pipeline (RF patent No. 2148205 “Device for detecting and registering the location of defects and obstructions protruding inwardly in a pipeline”, class F17D 5/00). The device contains a sealed container mounted in the housing, on which elastic cuffs are fixed, completely overlapping the internal section of the pipeline, series-connected path sensors and an electronic unit located inside the container, the fixed part of which is fixed to the device’s body, and the movable part is mounted on a removable disk pivotally mounted on the device case coaxially with the cuffs.

The disadvantage of this device is that it is aimed at identifying on the inner surface of the pipelines only protruding inward defects, as well as the complexity of the design and the inability to study pipelines of small diameters.

A device is also known for measuring and non-destructive testing of pipeline material (RF patent No. 2139468 "Device for measuring and non-destructive testing of pipeline material", CL F17D 5/00, G01N 29/00, 27/87). A device for measuring and non-destructive testing of pipeline material comprises a cylindrical carrier of sensors located at its circumferential periphery, a sealed housing articulated to the carrier and carrying means for processing information connected to the sensors, as well as a power supply. Depending on the problem statement, various types of sensors are used, electro-optical, ultrasonic, etc.

The disadvantages of this device are the complexity of the equipment, the complexity of maintenance and operation, the inability to diagnose pipelines of small diameters.

Closest to the claimed technical solution is the method adopted by us as a prototype for determining the location of a coating defect in the inner surface of the pipeline by placing a flexible annular chamber in a controlled pipeline, followed by filling it with air, through the center of which a cable is passed that encompasses the chamber along arc 180, and one end fixed at the beginning of the pipeline, the other end wound on a winch drum having a speed sensor (RF patent No. 2164321 "Method for determining a pipeline defect ", CL F17D 5/00). The task is achieved by pre-creating a constant test pressure in the cavity between the beginning of the pipeline and the annular chamber, under the action of which the annular chamber is moved through the pipeline at a given speed and the location and quantitative parameters of defects are determined by the magnitude of the change in test pressure.

The disadvantage of this method is the limited ability to identify defects (recorded only in the form of a through hole,

slots, bends, etc.), as well as the limited length of the tested pipeline due to the severity of the cable.

The utility model is based on the task of improving the quality of the internal surface of the pipeline and improving the quality of operation by diagnosing the internal section of the pipeline for defects — narrowing, presence of deposits, increase in pipe diameter, presence of cut-ins, gusts, pipe sections without internal anti-corrosion coating (“black” inserts).

The problem is solved by a device for monitoring the integrity and cross-section of the pipeline, consisting of a pipeline, plug, pressure gauge, piston, centrifugal pump unit. In the first version of the diagnosis, there is an additional seal on the plug and a drum with a wire and a wire flow recorder, and in the second version, a position indicator and a global positioning device.

In the claimed technical solution, the piston is made elastically deformable, and its working diameter corresponds to the inner diameter of the pipeline, and the annular cavity is sealed at the end of the pipeline with a plug with a sealant. To pump fluid into the diagnosed pipeline, a nozzle is inserted.

The diagnosis of the pipeline is carried out by skipping an elastically deformed piston in the pipeline under pressure, while the centrifugal pump unit operates with a constant engine speed and with a fixed position of the shutter valve. By changing the pressure up or down and with the binding of these pressure surges along the length of the pipeline, anomalies of the internal section of the pipeline are determined. An increase in pressure indicates a narrowing of the passage section of the pipeline (deposits, deformation of the inner coating, etc.) and a decrease in the increase in pipe diameter, lack of inner coating, the presence of unauthorized taps or leaks. The magnitude of the pressure drop determines the size of the anomalies. In the second

option possible diagnosis of the pipeline of any length. It should be noted that the installation adopted for the prototype determines the leakage of the pipeline only for small lengths.

The claimed technical solution is illustrated by drawings, where:

- figure 1 presents a device for monitoring the integrity and cross-section of the pipeline with binding anomalies along the length of the pipeline using a wire -1 option:

- 1 - pipeline;

- 2- elastically deformable piston;

- 3 - a stub;

- 4 - the cavity of the pipeline;

- 5 - pipe;

- 6 - manometer;

- 7 - a sealant;

- 8 - drum with a winch;

- 9 - wire flow recorder;

- 10 - wire.

- figure 2 presents a device for monitoring the integrity and cross-section of the pipeline with binding anomalies along the length of the pipeline using the location detector - II option:

- 1 - pipeline;

- 2 - elastically deformable piston;

- 3 - a stub;

- 4 - the cavity of the pipeline;

- 5 - pipe;

- 6 - manometer;

- 11 - position indicator. The following two options are used to link pressure surges to the length of the pipeline.

In case I, equipment for researching wells (or similar) is used, which includes a drum with a wire, a wire flow recorder and a sealant (lubricator). The elastically deformable piston is fastened to the wire and installed through the sealant (lubricator) into the pipeline. With the movement of the elastically deformable piston, a wire flow rate is generated, which is fixed by the recorder and is tied to the pressure gauge.

In option II, a position indicator is attached to the elastically deformable piston. Places and sections of the pipeline with defects are determined by the global positioning device according to the readings of the pressure gauge and the location indicator. This device is autonomous and mobile, allows you to diagnose pipelines of any diameter and length.

The proposed device for monitoring the integrity and cross-section of the pipeline with binding anomalies along the length of the pipeline works as follows:

I option:

An elastic-deformable piston 2 is placed in the diagnosed pipeline 1, with a diameter corresponding to the inner diameter of the pipeline 1, mounted on the wire 10. The wire 10 is passed through the seal 7 in the plug 3 and wound at the other end onto the winch drum 8, on which there is a wire flow recorder 9. On the end of the pipeline 1 with a small diameter of the pipe 1 cut an additional pipe 5 for pumping liquid, and with large diameters of the pipes, the pipe 5 is cut into the plug 3 with a seal 7. A pressure gauge is installed on the pipe 5 p 6.

Elastically deformable piston 2 is placed at the beginning of pipeline 1. Using a centrifugal pump unit (not shown in Fig.), A fluid with a constant engine speed and at one (fixed) position of the shutter valve (1) is inserted into the cavity 4 of the pipeline 1, formed by the elastically deformable piston 2 and the plug 3. in Fig. not indicated).

The fluid flow should ensure uniform movement of the elastically deformable piston 2.

When the elastically deformable piston 2 moves in the pipeline 1 at the places of narrowing or obstacles with a pressure gauge 6, an increase in pressure will be recorded, and in the places of increase in the diameter of the pipeline 1 (lack of internal coating), unauthorized taps and leaks, a pressure drop will be recorded. The wire flow recorder 9 determines the location and length of the anomalous section. The magnitude and nature of pressure changes assess the type of defect and its characteristics.

II option:

An elastic-deformable piston 2 is placed in the diagnosed pipeline 1, with a diameter corresponding to the inner diameter of the pipeline 1, fixed with the position indicator 11. A nozzle 5 is inserted into the plug 3 at the beginning of the pipeline 1 for pumping liquid. A pressure gauge 6 is installed on the pipe 5.

Elastically deformable piston 2 is placed at the beginning of pipeline 1. Using a centrifugal pump unit (not shown in Fig.), A fluid with a constant engine speed and at one (fixed) position of the shutter valve (1) is inserted into the cavity 4 of the pipeline 1, formed by the elastically deformable piston 2 and the plug 3. in Fig. not indicated). The fluid flow should ensure uniform movement of the elastically deformable piston 2.

When the elastically deformable piston 2 moves in the pipeline 1 at the places of narrowing or obstacles with a pressure gauge 6, an increase in pressure will be recorded, and in the places of increasing the diameter of the pipeline 1, unauthorized taps and leaks, a pressure drop will be recorded. Using the location signaling device 11 through the GPRS satellite navigation system (not shown in FIG.), The location and length of the anomalous section are determined in accordance with changes in pressure on the manometer 6, and by the value of the drop

or increase in pressure relative to the pressure in the pipeline 1 in areas without anomalies, determine the type and characteristics of the defect.

Using this utility model will allow to determine the location of pipeline defects, to carry out their preventive repairs, which in turn will lead to lower operating costs, energy costs due to the elimination of narrowing sections of the pipeline, the number of failures, losses of transported liquid due to finding unauthorized taps and leaks, and also allows you to comply with environmental requirements.

The integrity and cross-section of the pipeline is controlled by a non-destructive method, without excavation and violation of the integrity of the pipe.

The positive aspects of this device are the simplicity of design, the ability to use existing equipment, low operating costs, since the integrity and cross-sectional control device is made of materials compatible with the transported medium and is widely used in the petrochemical and oil and gas industries.

The proposed utility model combines many of the capabilities of the above devices and when working with this device does not require highly qualified staff.

The pipeline integrity and cross-sectional control device allows to ensure reliable determination of defective sections where pipeline failures can occur. It not only detects the presence of a defective area, but also determines its specific location and the nature of the defect.

Claims (1)

A device for monitoring the integrity and cross section of a pipeline, including a pipeline and consisting of a manometer, piston, a centrifugal pump unit, a plug with a seal, a drum with a wire, a wire flow recorder or a position indicator and a global positioning device, characterized in that the piston is made elastically deformable, and its working the diameter corresponds to the internal diameter of the pipeline, while for the injection of fluid into the diagnosed pipeline, a nozzle is inserted, control of change for phenomenon is produced in the sealed cavity formed between the piston and the resiliently deformable cap with gasket on the end of the pipeline, and the work of the centrifugal pump unit occurs at constant engine speed and a fixed position of flowline valves.