CN104931649A - Submarine pipeline land simulation test platform and test method - Google Patents

Abstract

The invention discloses a submarine pipeline land simulation test platform and test method, which belongs to the field of simulation test, and aims at overcoming the defect that no special submarine pipeline land simulation test platform is provided at present. The submarine pipeline land simulation test platform comprises a pipeline with a defect sample preset on a hollow pipe wall and a power system; the power system comprises an automatic traction control device, a working condition simulation device, an electrical power supply device and an instrument control device; the working condition simulation device is a pure liquid working condition simulation device and/or pure gas working condition simulation device. By adopting the submarine pipeline land simulation test platform and test method, the operation condition of an inner detector under different medium (pure liquid, pure gas) conditions can be simulated, the passing capacity of the inner detector can be verified, the defect detection precision, positioning precision, shapes and size of a defect and the like of the inner detector can be verified, and the positioning capacity of the inner detector in seawater can be tested, so that the fault probability when in ocean test can be reduced.

Description

Submarine pipeline land simulation test platform and test method

technical field

The invention relates to the field of simulation testing, in particular to a submarine pipeline land simulation test platform and a test method using the submarine pipeline land simulation test platform.

Background technique

Submarine pipelines (especially pipelines used to transport oil and gas) work in harsh environments. Once excessive defects occur on the pipe wall, it may cause damage and leakage of the pipeline, with serious consequences. In order to avoid this situation, it is necessary to inspect the pipeline regularly and irregularly, in order to find the defect as early as possible, repair or replace the defective pipeline in time.

The pipeline detection method is to place an internal detector in the pipeline, and the internal detector operates in the pipeline with the power of the conveying medium to realize the online detection of the pipeline. After the design and processing of the internal detector is completed, it cannot be directly used for pipeline inspection, but the reliability of the instrument needs to be tested, and the defect detection accuracy, positioning accuracy, defect shape and size, etc. of the magnetic flux leakage inspection system need to be tested. Test verification.

At present, there is no special land simulation test platform for submarine pipelines that can be used for internal detector testing, resulting in insufficient stability, defect detection accuracy, and positioning accuracy of the internal detector after it is put into use.

Contents of the invention

An object of the present invention is to propose a land simulation test platform for submarine pipelines that can simulate the operating conditions of the internal detector under different medium conditions.

Another object of the present invention is to propose a land simulation test method for submarine pipelines that makes the inner detector test structure more realistic and accurate.

For reaching this purpose, on the one hand, the present invention adopts following technical scheme:

A submarine pipeline land simulation test platform, the test platform includes a pipeline and a power system with defective samples preset on the hollow pipe wall; the power system includes a traction automatic control device, a working condition simulation device, an electrical power supply device and an instrument control device; traction automatic control device, providing traction for the internal detector; working condition simulation device, filling liquid or gas in the pipeline, simulating the working state of the submarine pipeline; electrical power supply device, supplying power to the device in the test platform ; The instrument control device includes a controller, a plurality of on-site working instruments respectively connected to the controller, and the on-site working instruments are used to detect performance parameters or devices of each device in the test platform; wherein, the working conditions The simulation device is a pure liquid working condition simulating device and/or a pure gas working condition simulating device.

In particular, the pipeline includes a fixed pipe and a replacement pipe; the defective sample is at least arranged on the pipe wall of the replacement pipe.

In particular, the device for simulating pure liquid conditions includes a booster pump, a first ball delivery cylinder, a first ball collection cylinder, and a buffer water tank; wherein, the first ball delivery cylinder and the first ball collection cylinder are respectively connected to the The two ends of the pipeline; the booster pump is arranged at the outer end of the first ball sending cylinder, and the buffer water tank is arranged at the outer end of the first ball receiving cylinder.

In particular, the pure gas working condition simulation device includes an air compressor, a second ball receiving cylinder, a second ball receiving cylinder, an air buffer tank and a cooling water pump; At both ends of the pipeline; the air compressor is arranged at the outer end of the second ball barrel, and the air buffer tank is arranged between the air compressor and the second ball barrel.

Further, a flow regulating valve is provided at the outlet of the air buffer tank.

In particular, the traction automatic control device includes a hoist, and the hoist provides traction for the inner detector.

In particular, the outside of the pipe wall of the pipe is coated with an anti-corrosion layer.

In particular, the on-site working instruments include a pressure gauge and a safety valve arranged on the working condition simulation device, and a regulating valve and a ball indicator arranged on the pipeline.

On the other hand, the present invention adopts the following technical solutions:

A test method using the above-mentioned submarine pipeline land simulation test platform. When simulating pure liquid working conditions, water is used as the test medium. After the water is pressurized by the booster pump, it enters the pipeline through the first serving cylinder and circulates the pipeline. The end of the pipeline returns to the booster pump after being buffered by the buffer water tank for recycling; when simulating the pure gas working condition, use air as the experimental medium, and the air is pressurized by the compressor and then buffered by the air buffer tank , the buffered air enters the pipeline through the second serving cylinder, flows through the pipeline, and is discharged into a designated position after being depressurized at the end of the pipeline.

In particular, when simulating pure gas working conditions, a certain amount of air is pre-stored in the air buffer tank before the test starts, and then the ball-through detection operation is performed.

The submarine pipeline land simulation test platform of the present invention comprises the pipeline and the power system that presets defective samples on the hollow pipe wall, and the power system can pull the inner detector to move in the pipeline, and can simulate different media (pure liquid, pure water) of the inner detector. operating conditions under air) conditions, verify the passing ability of the internal detector, verify the accuracy of the internal detector for defect detection, positioning accuracy, shape and size of defects, etc., and can test the positioning ability of the internal detector in seawater This reduces the chance of failure during sea testing. Different defects can be selected for testing by replacing different replacement tubes to meet the needs of various internal detectors.

The land simulation test method of the submarine pipeline of the present invention includes simulating pure liquid working conditions and simulating pure gas working conditions, and changes the working environment in the pipeline by changing the experimental medium, so that the test results of the inner detector are more real and accurate.

Description of drawings

Fig. 1 is a schematic structural view of a submarine pipeline land simulation test platform provided by a preferred embodiment of the present invention;

Fig. 2 is a classification diagram of metal loss defects provided by the preferred embodiment 1 of the present invention.

Labeled in the figure:

1. Defective sample; 2. Pipeline; 3. Traction automatic control device.

Detailed ways

The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

Preferred embodiment one:

This preferred embodiment provides a land simulation test platform for a submarine pipeline. As shown in Fig. 1, the test platform includes a pipeline 2 with a defective sample 1 preset on the hollow pipe wall and a power system, and the outside of the pipe wall of the pipe 2 is coated with an anti-corrosion layer. The power system includes traction automatic control device 3, working condition simulation device, electric power supply device and instrument control device.

Wherein, the traction automatic control device 3 provides traction force for the inner detector, preferably, the traction automatic control device 3 includes a winch, and the winch provides traction force for the inner detector; the working condition simulation device is filled with liquid or gas in the pipeline, simulating the submarine pipeline working environment; the electrical power supply device supplies power to the devices in the test platform; the instrument control device includes a controller and multiple on-site working instruments connected to the controller, and the on-site working instruments are used to detect the performance parameters or devices of each device in the test platform .

Specifically, the working condition simulating device is a pure liquid working condition simulating device and/or a pure gas working condition simulating device. The pure liquid working condition simulation device includes a booster pump, a first ball-emitting cylinder, a first ball-receiving cylinder and a buffer water tank; wherein, the first ball-emitting cylinder and the first ball-receiving cylinder are respectively connected to the two ends of the pipeline 2; the booster pump The buffer water tank is arranged at the outer end of the first ball receiving cylinder. The pure gas working condition simulation device includes an air compressor, a second ball-emitting cylinder, a second ball-receiving cylinder, an air buffer tank and a cooling water pump; wherein, the second ball-emitting cylinder and the second ball-receiving cylinder are respectively connected to both ends of the pipeline 2; The air compressor is arranged at the outer end of the second serving cylinder, and the air buffer tank is arranged between the air compressor and the second serving cylinder. A flow regulating valve is arranged at the outlet of the air buffer tank.

The pipeline 2 includes a fixed pipe and a replacement pipe, and the defect sample 1 is set on the pipe wall of the replacement pipe or on the pipe walls of the fixed pipe and the replacement pipe at the same time. The connection between the fixed tube and the replacement tube is detachable, and the type of defective sample 1 can be changed by replacing the replacement tube to meet the testing requirements of different internal detectors.

Field work instruments include pressure gauges and safety valves installed at the inlet and outlet of booster pumps and air compressors, pressure gauges installed on the first ball cylinder, the first ball collection cylinder, the second ball cylinder and the second ball collection cylinder And the safety valve, the regulating valve arranged on the pipeline 2, and the ball indicator.

Defect sample 1 mainly includes three types: recessed control defects, protruding control defects, and random defects. The so-called control defects refer to artificial defects, which are obtained by studying actual pipeline defects, finding out the characteristics of these defects, and classifying and summarizing them, which can represent those actual defects. Control defects are artificially designed and manufactured, so their size and parameters are known, which provides a reference for judging whether the defect detection accuracy, positioning accuracy, and detection results of the defect shape and size of the internal detector are correct in accordance with.

In the process of designing and manufacturing control defects, some defects with unknown parameters may be generated, that is, random defects. These defects are more complex than control defects, but are closer to real pipeline defects, and can achieve the purpose of further testing the detection effect of the internal detector.

Depression-type control defects include abnormal geometry (sag, elliptical deformation, displacement, etc.), metal loss (corrosion, scratches, etc.), cracks (fatigue cracks, stress corrosion cracking, etc.). Protruding control defects include weld seams and solder joints, etc.

Fig. 2 is a classification diagram of metal loss defects obtained according to defect size (length, width and height). The geometric parameter A in the figure is valued in the following way: when t<10mm, A=10mm, when t≥10mm, A=t, where t is the wall thickness.

There is no limit to how many defects are made on the pipe wall, the types of defects to be made, the size and quantity of defects to be made, and the location of defects, etc., and are determined according to the use requirements.

Based on the test method of the above-mentioned submarine pipeline land simulation test platform, when simulating the pure liquid working condition, water is used as the experimental medium. After being buffered by the buffer tank, the end returns to the booster pump for recycling;

When simulating pure gas working conditions, air is used as the experimental medium. The air is pressurized by the compressor and then buffered by the air buffer tank. The buffered air enters the pipeline 2 and the circulation pipeline 2 through the second serving cylinder, and passes through the Discharge into designated location after decompression. In consideration of economy, a low-displacement compressor (displacement of 3600Sm ³ /h) + air buffer tank is used, that is, a certain amount of air is pre-stored in the air buffer tank before the test starts, and then the ball-through test is performed operate.

Preferred embodiment two:

This preferred embodiment provides a land simulation test platform for submarine pipelines, the structure of which is basically the same as that of the first preferred embodiment. The test platform includes a pipeline with defective samples preset on the hollow pipe wall and a power system; the power system includes a traction automatic control device, a working condition simulation device, an electrical power supply device and an instrument control device. Among them, the traction automatic control device provides traction for the internal detector; the working condition simulation device fills the pipeline with liquid or gas to simulate the working state of the submarine pipeline; the electrical power supply device supplies power to the devices in the test platform; the instrument control device includes a controller, A plurality of on-site working instruments respectively connected to the controller, the on-site working instruments are used to detect the performance parameters or devices of each device in the test platform. Specifically, the working condition simulating device is a pure liquid working condition simulating device and/or a pure gas working condition simulating device.

The difference is that: the pipeline is a whole section of straight pipe, and all kinds of required defect samples are set on the pipe wall, which is suitable for the test of various internal detectors; the pure liquid working condition simulation device and/or the pure gas working condition The specific structure of the simulation device is not limited, as long as it can simulate the working state of the submarine pipeline (especially the oil and gas pipeline); the traction automatic control device is not limited to include a winch, and any device that can provide traction for the inner detector is acceptable;

On-site working instruments are not limited to the pressure gauges and safety valves installed on the inlet and outlet of the booster pump, the inlet and outlet of the air compressor, and the receiving and receiving balls, the regulating valves installed on the pipeline, and the ball indicator, and can also include other Instruments that can detect the working status of on-site working instruments.

When pure liquid working conditions are used for simulation, the test method based on the above-mentioned submarine pipeline land simulation test platform is the same as that of the preferred embodiment 1.

When the pure gas working condition is used for simulation, the air is pressurized by the compressor and then buffered by the air buffer tank. The buffered air enters the pipeline and circulation pipeline through the second serving cylinder, and is discharged into the designated position after being depressurized at the end of the pipeline. The difference is that the air is not pre-stored in the air buffer tank before the test begins.

Note that the above are only preferred embodiments of the present invention and applied technical principles. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and can also include more other equivalent embodiments without departing from the concept of the present invention, and the present invention The scope is determined by the scope of the appended claims.

Claims (10)

1. A submarine pipeline land simulation test platform is characterized in that, said test platform comprises a pipeline (2) and a power system preset with a defective sample (1) on a hollow pipe wall; said power system includes traction automatic control device (3), working condition simulation device, electrical power supply device and instrument control device; Traction automatic control device (3) provides traction force for the inner detector; A working condition simulating device, filling the pipeline with liquid or gas to simulate the working state of the submarine pipeline; An electrical power supply device for supplying power to devices in the test platform; The instrument control device includes a controller and a plurality of on-site working instruments respectively connected to the controller, and the on-site working instruments are used to detect the performance parameters or devices of each device in the test platform; Wherein, the working condition simulating device is a pure liquid working condition simulating device and/or a pure gas working condition simulating device. 2. The submarine pipeline land simulation test platform according to claim 1, characterized in that, the pipeline (2) includes a fixed pipe and a replacement pipe; the defective sample (1) is at least arranged on the pipe wall of the replacement pipe superior. 3. The submarine pipeline land simulation test platform according to claim 1, wherein the pure liquid working condition simulation device includes a booster pump, a first serving cylinder, a first ball receiving cylinder and a buffer water tank; wherein, The first ball-serving cylinder and the first ball-receiving cylinder are respectively connected to the two ends of the pipeline (2); the booster pump is arranged at the outer end of the first ball-serving cylinder, and the buffer water tank is arranged at the Describe the outer end of the first ball receiving tube. 4. The submarine pipeline land simulation test platform according to claim 1, wherein the pure gas working condition simulation device includes an air compressor, a second ball delivery cylinder, a second ball collection cylinder, an air buffer tank and a cooling water pump ; Wherein, the second ball delivery cylinder and the second ball collection cylinder are respectively connected to the two ends of the pipeline (2); the air compressor is arranged at the outer end of the second ball delivery cylinder, and the air buffer tank It is arranged between the air compressor and the second serving cylinder. 5. The submarine pipeline land simulation test platform according to claim 4, characterized in that a flow regulating valve is arranged at the outlet of the air buffer tank. 6. The submarine pipeline land simulation test platform according to any one of claims 1 to 5, characterized in that, the traction automatic control device (3) includes a hoist, and the hoist provides traction for the inner detector. 7. The submarine pipeline land simulation test platform according to any one of claims 1 to 5, characterized in that the outside of the pipeline (2) is coated with an anti-corrosion layer. 8. According to any one of claims 1 to 5, the submarine pipeline land simulation test platform is characterized in that, the field working instruments include a pressure gauge and a safety valve arranged on the working condition simulation device, and a pressure gauge arranged on the working condition simulation device. The regulating valve and ball indicator on the above-mentioned pipeline. 9. A test method using any one of claims 3 to 8, the submarine pipeline land simulation test platform, characterized in that, when simulating the pure liquid working condition, water is used as the test medium, and the water is pressurized by the booster pump Enter the pipeline (2) through the first serving cylinder, circulate through the pipeline (2), and return to the booster pump after being buffered by the buffer tank at the end of the pipeline (2) for recycling; When simulating the pure gas working condition, use air as the experimental medium, the air is buffered by the air buffer tank after being pressurized by the compressor, and the buffered air enters the pipeline (2) through the second serving cylinder and circulates through the pipeline ( 2), after the end of the pipeline (2) is depressurized, it is discharged into a designated position. 10. The submarine pipeline land simulation test method according to claim 9, characterized in that, when simulating the pure gas working condition, a certain amount of air is pre-stored in the air buffer tank before the test begins, and then the ball is passed Detect operation.