RU2228487C2 - Method and system for track examination and diagnostics of operating main pipelines - Google Patents

Abstract

FIELD: pipeline transport. SUBSTANCE: method involves television inspection of equipment under examination by means of type VB21C-R36 or KPS-190SW moisture-proof video camera having viewing angle of 92 deg. and capable of withstanding hydraulic pressure of up to 25 which is inserted in pipeline under examination. Camera is accommodated in sealed titanium case which is protected by type K8 15 mm thick polished glass whose ultimate bending strength is about 17.0 MPa with water-absorbing material of adsorbent type placed underneath. Camera is provided with halide light source and is mounted on horizontal platform made of fir-wood bars impregnated with boiling industrial oil at distance of 5 to 15 cm from front edge along its center line; platform thickness is 80 mm, length-to- width ratio is 3 : 1, and its volume-to-pipeline-diameter ratio is 1 : 4; platform is moving with stream and camera feeding cable reeled off drum through leading block is mounted on floats and follows the platform to transfer information to type DCR-TRV 17E Sony digital recording video camera with 3.5 in. monitor or similar camera, accompanying comments being transmitted through microphone. In addition system designed for examining and diagnosing operating main pipelines with aid of video equipment has type VB21C-R36 or KPC-190SW video camera with 92 deg. angle of vision; 5 to 10 W halide light sources; type DCR-TRV17E Sony video camera with 3.5-in monitor or similar camera; 80 mm thick horizontal platform whose length-to-width ratio is 3 : 1 and its volume-to-pipeline-diameter ratio is 1 : 4, made of fir-wood bars impregnated with boiling industrial oil; drum carrying double-covered three-core power cable; floats and covered-distance marks; cable leading block; and 12-V independent dc power supply. EFFECT: provision for on-line examination of pipeline. 2 cl, 6 dwg

Description

The invention relates to pipeline transport and can be used for routine inspection and diagnosis of horizontal operating pipelines, fully or partially filled with relatively transparent moving liquid products, including aggressive and toxic substances. There are various methods of examination and diagnosis of horizontal pipelines using ultrasound (RU No. 2169308, class F 17 D 5/02, 2001), using thermal imaging equipment (RU No. 21746445, class F 17 D 5/02, 2001 .), using profiler shells (RU application No. 99121878, class F 17 D 5/06, 2001), as well as using video cameras (DE 3803274 and PCT No. 99/22123, class F 17 D 5 / 00, 1989).

The most significant drawback of the known methods is the complexity, low velocity of the movement of shells, with the help of which trunk pipelines are studied, and the relatively insufficient amount of information about the state of the objects under examination.

The closest technical solutions to the present proposed invention are international security documents: WO 99/22123 and 94/05989. Document No. 94/05989 protects a more complex method, involving the use of a bulky propulsion device and other numerous equipment, which does not allow to quickly examine relatively long pipelines having a relatively large diameter. In addition, this method is associated with a relatively large expenditure of human labor and time. Document No. 99/22123 also provides for the use of bulky equipment, which makes it difficult to examine relatively long, inaccessible sections of the pipeline having a diameter of more than 100 mm, and also requires high labor and time costs.

The present invention is not associated with the above drawbacks: it allows you to examine the main pipelines promptly, filled with 70-80 and 100% liquid relatively transparent products, including toxic and aggressive substances having a length of up to 500 m and a diameter of 300 mm and above. When examining pipelines filled with liquid products by more than 80%, the platform with a video camera is turned vertically 180 degrees. The purpose of the coup is to prevent the braking of the raft with the camera. The camera captures the image of the underwater part of the pipeline. The method does not require bulky equipment, large labor and time costs. The weight of the entire system of equipment used in the present invention does not exceed 48 kg, one or two people are enough to service the method and equipment.

Fig 1-6 characterize the proposed method and system for its implementation:

figure 1 - the main elements of the system for inspection of pipelines;

figure 2 - platform used in the examination of existing pipelines;

figure 3 - platform with a mover used in the inspection of inactive pipelines;

figure 4 - method and system used in the existing pipeline;

5 is a method and system used in an existing pipeline with an inverted camera and platform 180 degrees;

6 is a method and system operating in a pipeline without the presence of flow.

For inspection and diagnosis of existing trunk pipelines, a system is used (Fig. 1), including the following elements:

1 - a horizontal platform made of coniferous wood bars soaked in boiling industrial oil (Figs. 1-6, 1) used for examination (Fig. 1, 1);

2 - underwater waterproof camera type B 21C-R36 or KRS-190SW with a viewing angle of 92 degrees (Fig. 1-6, item 2) with halogen light sources with a power of 5-10 W (Fig. 1-6, item 6) ;

3 - digital video recorder type Sony DCR-TPV 17E with a 3.5 inch monitor or the like (Figs. 1.4-6, item 8);

4 - a drum with a three-core power cable (Fig. 1.4-6, item 5);

5 - floats (Fig.1,4 -6, item 9);

6 - power supply DC voltage of 12 volts (Fig.1,4 -6, item 7).

The proposed method for the examination and diagnosis of trunk pipelines is as follows.

A horizontal platform (Figs. 1,2,4,5, Pos. 1), on which a waterproof video camera is mounted (Figs. 1,2,4,5, Pos.), Is introduced into the main pipeline, which is 70-100% filled with liquid products. . 2). The camcorder is located on the center line of the platform 5-15 cm from its front edge.

The platform is made of softwood bars soaked in boiling industrial oil, such as transformer oil. The thickness of the platform is 80 mm, the length refers to the width of 3: 1, and the ratio of the platform volume to the diameter of the examined pipeline is 1: 4. Such ratios ensure the stability of the platform and prevent its hooks when moving with the flow. As a video camera, a VB21C-R-36 or KPC-190SW type camera is used in a sealed titanium case that can withstand hydraulic pressure up to 25 atm.

The camera is protected by a special high-strength polished glass of type K8 (GOST 3514-94) with a thickness of 15 mm, the tensile strength of the glass in bending is about 17.0 MPa. To prevent fogging of the camera glass, a moisture-absorbing material is introduced under it - selicogel or zeolite adsorbent in an amount of 10-20 g.

Moisture-proof halogen light sources (Fig. 1-6, item 6) three are fixed near the video camera. The power of light sources is 5-10 watts.

A three-core supply cable with double insulation (Figs. 1, 4, 6, pos. 4) is attached to the camera, which moves with the speed of the liquid flow following the platform on the floats (Figs. 4-6, pos. 9), unwinding from the drum ( 4-6, pos. 5) and heading into the pipeline through the guide roller (Figs. 4-6, pos. 3). There are length signs on the cable to record the location of identified defects or foreign objects.

Information from the video camera moving through the pipeline enters the digital terrestrial, recording video camera of the Sony DCR-TRV-17E type with a 3.5-inch monitor or the like (Fig. 1, item 8) and is accompanied by comments through the microphone.

The power of all equipment is provided from an independent source of direct current (battery) with a voltage of 12 volts (Fig. 1.4-6, item 7).

The weight of all equipment is 48 kg .:

- a drum with a cable (> 120m) + a waterproof video camera in a pressure jacket with lamps - 29 kg;

- power supply (battery) - 18 kg (Fig. 1,4,6, item 7);

- recording video camera - 0.7 kg (Fig.1,4,6, pos. 8).

When examining the main pipelines filled with liquid products, but in the absence of their flow, a propulsor is used - a platform on four metal wheels, two of which are vane, and are driven by an electric motor (Fig. 6, item 10), and two wheels supporting ( 6, item 11). The system for implementing the proposed method of route survey and diagnostics of trunk pipelines includes the following elements:

- underwater waterproof camera type VB21C-R36 or KPC-190SW with a viewing angle of 92 degrees (Fig.6, pos. 2) with halogen light sources with a power of 5-10 W (Fig.6, pos. 6);

- a digital recording video camera of the Sony DCR-TPV17E type with a 3.5 inch monitor or the like (Fig. 6, item 8);

- a horizontal platform made of bars of coniferous wood, soaked in boiling industrial oil (Fig.6-3, item 1);

- a drum with a three-core power cable having double insulation (Fig. 1,4-6, pos. 5), floats (Fig. 6, pos. 9) and signs of the distance traveled;

- a guide roller for the cable (Fig.6, item 3);

- an independent power source (battery) of direct current voltage of 12 volts (Fig.6, item 7).

The method and system are easy to operate and are serviced by one to two people.

For a better understanding of the method and system, the following example is presented.

On the territory of the Yaroslavl oil refinery, a video survey of the existing reservoir was carried out. The purpose of the examination is to identify the presence of pipe defects. For this, we used the method and system of the on-line inspection and diagnostics of existing trunk pipelines.

In this situation, the diameter of the pipeline was 1000 mm. The length of the pipeline is 5300 m. The distances between the wells ranged from 80 to 500 m. In the video inspection of the collector, in this case, two people (operators) performed work. Since the weight of the equipment is very small (48 kg), this made it possible to easily deliver equipment to the test object from the vehicle in the hands due to the impossibility of access to the test object by transport.

The order of work was as follows:

Three-core power cable with double insulation with length markings, with a VB21C-R36 type waterproof waterproof video camera attached to it with a viewing angle of 92 degrees in a sealed titanium case protected by a special polished K8 glass with a thickness of 15 mm with a bending strength of about 17.0 MPa, under which there is a moisture-absorbing substance (adsorbent) with three halogen light sources with a power of 5-10 W attached to it, were unwound from the drum to a length that would slightly exceed the distance from one well to another ugom. Then the connector on the drum, which is connected to a three-wire power cable, was connected to an independent current source, voltage of 12 volts (battery), a connecting cable. The video output with the depth of the video camera located on the reel was connected to the video input of a Sony DCR-TRV 17E type ground recording digital video camera with a 3.5-inch monitor with a connecting cable. An in-depth video camera is installed on a platform with a thickness of 80 mm, the length of which relates to a width of 3: 1, and the volume to the diameter of the pipeline as 1: 4, made of coniferous wood bars soaked in boiling industrial oil, and fixed with a metal clamp. Floats were attached to a three-core supply cable at a distance of 1.5-2 m. The first operator lowers the platform with the depth camera attached to it through a roller into the collector well and begins to pass the cable into the collector at a rate equal to the fluid flow. The second operator looks at the monitor of the recording video camera, simultaneously recording video information, commenting it through the microphone (marks of the distance traveled, marks of the distance from the well to the defect found, description of the defect) and directs the first operator. During the video inspection, the first operator reports the distance marks to the second operator.

During the video inspection of the collector, holes were discovered in the pipes, lost wells, blockages, pipe production. Thanks to the video inspection, lost wells were restored, pipe defects were eliminated, blockages were removed, which normalized the work of the collector.

The method and system were tested in the period 1998-2002. During this period, trunk pipelines with a length of about 10,000 m were examined. All identified defects were eliminated, and the elimination of defects and cleaning of the pipelines was monitored using the invention.

Claims (2)

1. A way of routine inspection and diagnostics of existing trunk pipelines, which consists in tele-inspection of the object being examined, characterized in that a VB21C-R36 or KPC-190SW type camera with a viewing angle of 92 ° in an airtight titanium case is introduced into the pipeline protected by special polished glass of type K8 with a thickness of 15 mm and with a flexural strength of about 17.0 MPa, under which there is a water-absorbing substance such as an adsorbent, equipped with halogen sources light mounted on a horizontal platform along its center line at a distance of 5-15 cm from the front edge, and the platform is made of coniferous wood soaked in boiling industrial oil, has a thickness of 80 mm, the length refers to a width of 3: 1, and the platform volume refers to the diameter of the pipeline as 1: 4, and moves along the stream, behind which the supply cable attached to the video camera moves on the floats and is unwound from the drum through the guide unit through which video information is transmitted to ik- type digital video camera DCR-TRV 17E Sony 3.5 inch monitor with or similar to it, its accompanying comments via a microphone. 2. A system for routine inspection and diagnostics of existing trunk pipelines using video equipment, characterized in that it includes a VB21C-R36 or KPC-190SW video camera with a viewing angle of 92 °, halogen light sources with a power of 5-10 W, recording a digital video camera of the DCR type -TRV17E Sony with a 3.5-inch monitor or similar, a horizontal platform with a thickness of 80 mm, the length of which relates to a width of 3: 1, and the volume to the diameter of the pipeline as 1: 4, made of coniferous wood, soaked in boiling industrial oil Drum with three-core power cable having a double insulation and signs of length, the guide roller for the cable and an independent source of DC voltage of 12 V.

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