Oil and gas pipeline leakage acoustic emission inside detection system and method

Abstract

The invention provides an oil and gas pipeline leakage acoustic emission inside detection system and method. The system comprises a pipeline leakage inside detector and an upper computer, wherein the pipeline leakage inside detector is arranged inside a to-be-detected oil and gas pipeline and is used for acquiring an acoustic signal of the to-be-detected oil and gas pipeline, generating a corresponding electric signal, acquiring first clock data and mileage data, corresponding to the first clock data, of the pipeline leakage inside detector operating in the to-be-detected oil and gas pipeline and saving and transmitting the electric signal, the first clock data and the mileage data to the upper computer; the upper computer is used for receiving the electric signal, the first clock data and the mileage data corresponding to the first clock data, which are transmitted by the pipeline leakage inside detector, determining leakage when RMS or ASL of the electric signal is higher than a preset threshold value and determining the position of a leakage point according to the clock data and the mileage data. According to the system, the limitation in the prior art can be overcome, the leakage is detected from the interior of the pipeline, the long-distance continuous pipeline detection can be performed, and the system is high in sensitivity, low in cost and small in size.

Description

technical field [0001] The invention relates to the technical field of oil and gas pipeline transportation, in particular to an acoustic emission internal detection system and method for oil and gas pipeline leakage. Background technique [0002] Pipeline transportation is one of the five major transportation industries alongside railways, highways, water transportation, and shipping. As one of the eight major types of special equipment, it is widely used in petroleum, chemical, fertilizer, electric power, metallurgy, light industry, medicine and other industrial fields and City gas, heating systems, and almost all fluids use pressure pipes in their production, processing, transportation and use. By the end of 2014, my country had about 900,000 kilometers of pressure pipelines. About 40% of my country's existing oil and gas pipelines have been in operation for about 20 years, and many pipelines have entered the stage of high incidence of accidents. Due to the dangerous cha...

AI Technical Summary

Problems solved by technology

However, my country's current oil and gas pipeline leakage monitoring and detection technology has its corresponding limitations. The existing leakage monitoring technology and system are mainly suitable for oil and gas pipelines with perfect data acquisition systems, and can only detect large leakage; existing State-of-the-art leak detection technology and instruments can only detect leaks from the outside of local pipe sections, and there is no technology and instruments that can quickly detect leaks on the entire oil and gas pipeline. Therefore, once a pipeline leaks, it often takes a lot of material and manpower and time to find the leak point, bringing accident hazards to the safe operation of the pipeline

At present, the internal corrosion detection of oil and gas pipelines is completed by the internal detector that can move inside the pipeline, but there is no mature internal leakage detector in the pipeline. At present, the acoustic emission technology is used to locate the corrosion detection that has been introduced into the pipeline. Apparatus and method, but primarily for locating the position of a detector unit for detecting anomalies in a pipe carrying a liquid, other than those to which the present invention relates

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