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Method for rapidly detecting pipeline body defects

A detection method and pipeline detection technology, which are applied in the field of ultrasonic measurement and pipeline system, can solve the problems of incapability of mature and reliable application of oil and gas pipeline detection methods, and achieve the effect of shortening the detection range.

Active Publication Date: 2010-06-30
PIPECHINA SOUTH CHINA CO
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] To sum up, it can be seen that all the current domestic patents are still only for the theoretical analysis of guided wave principle, patents for local key equipment or technology, and there is no mature and reliable detection method that can be applied in the field of oil and gas pipelines

Method used

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  • Method for rapidly detecting pipeline body defects
  • Method for rapidly detecting pipeline body defects
  • Method for rapidly detecting pipeline body defects

Examples

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Embodiment

[0117] Embodiment. This example is the method that carries out test at Baodi Station, and its composition is as figure 1 As shown, the process is as follows figure 2 shown. figure 1 A schematic diagram of the detection of common elbow sections is given in , in the figure 1-bend, 2-welds on both sides of the elbow, 3-corrosion, 4-girth weld, 5-sensor ring, 6-pipe support, 7 - Detect Host, 8 - Computer.

[0118] The detection process in this example is as follows:

[0119] 1) Understand and master the pipeline specification, pipeline support system, pipeline anti-corrosion layer, pipe body temperature, difficulty of approaching the detected position, corrosion degree, expected defect type, pipeline layout and historical situation information of the oil and gas pipeline to be tested;

[0120] 2) Complete the preparatory work of selecting the sensor ring, measuring the temperature of the pipe body, cleaning the surface of the oil and gas pipeline to be tested, and checking and...

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Abstract

The invention relates to a method for rapidly detecting pipeline body defects, which comprises the followings steps sequentially: 1) getting the specification, a support system, an anti-corrosion layer, the temperature, the corrosion degree, the pipeline layout and the historical information of a pipeline to be detected; 2) selecting a sensor ring, cleaning the surface of the pipeline to be detected, and inspecting and calibrating a detection system; 3) detecting each section of pipe on the ground only once, investigating with emphasis if problems are found, and determining detection times and positions of the buried pipelines according to different anti-corrosion layers and transmission media; 4) analyzing and diagnosing: labeling the basic properties of the pipeline, calibrating curves, comparing reflected signals and detection data in different positions, analyzing the variable frequency, diagnosing in a method of analyzing data in the same position in a superposition mode, observing the circumferential positions of the defects and classifying the degrees of the defects; and 5) determining a verification test pit and a detection test pit and analyzing pipe sections in the detection test pit according to diagnosis results, marking the positions of the defects, observing corrosion condition, measuring thickness, and finely scanning the defects to determine the positions, the properties and the sizes of the defects.

Description

technical field [0001] The invention is a quick detection method for pipeline body defects. The field of measurement and piping technology involving ultrasound. Background technique [0002] Ultrasonic guided wave technology is a new technology in the field of nondestructive testing. This technology is especially suitable for station pipe networks, refinery pipe networks, and long-distance pipelines that cannot implement intelligent online inspection (internal inspection) and pigging. Compared with traditional ultrasonic testing, the main advantages of ultrasonic guided wave technology are: fast detection speed, long detection distance, sound field throughout the entire pipe wall, 100% detection of wall thickness, suitable for detection of buried pipelines. Through the application of this technology, combined with other non-destructive testing methods, these difficult-to-inspect pipelines can be tested to ensure the pertinence of repairs and ensure the safety of pipeline op...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/04
Inventor 王维斌佟文强刘桂春王禹钦陈健峰刘哲刘广文梁峰
Owner PIPECHINA SOUTH CHINA CO
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