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Flow failure mode judgment method of underground heat oil pipe in high-water-content soil

A failure mode and judgment method technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as not considering the influence of moisture content

Active Publication Date: 2014-12-10
PIPECHINA SOUTH CHINA CO
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current flow safety evaluation method has not considered the influence of water content.

Method used

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  • Flow failure mode judgment method of underground heat oil pipe in high-water-content soil
  • Flow failure mode judgment method of underground heat oil pipe in high-water-content soil
  • Flow failure mode judgment method of underground heat oil pipe in high-water-content soil

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Embodiment Construction

[0050] see figure 1 , a method for judging the flow failure mode of a hot oil pipeline buried in high water content soil provided by an embodiment of the present invention includes the following steps:

[0051] 1. Automatic input and statistical analysis of pipeline operation data

[0052] Based on the actual production report, the software database module automatically collects uncertain data such as transportation volume, inbound and outbound temperature, pressure, ground temperature, heat transfer coefficient, pipeline burial depth, soil physical properties, etc., and eliminates invalid data caused by abnormal working conditions. Statistically analyze the uncertainty of each influencing factor, and establish its probability distribution function, the method is as follows:

[0053] Based on a large amount of pipeline operation history data, by analyzing the skewness and kurtosis coefficient, it is determined to select a normal distribution probability model suitable for des...

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Abstract

The invention provides a flow failure mode judgment method for an underground heat oil pipe in high-water-content soil. The flow failure mode judgment method comprises the steps that pipe operation data are automatically input, and statistic analysis is carried out; then, high-water-content underground heat oil pipe flow failure probability calculation is carried out, wherein pipe operation process simulation and failure probability calculation and pipe shutdown process simulation and failure probability calculation are included in the high-water-content underground heat oil pipe flow failure probability calculation process; pipe flow failure modes under different water contents are determined finally. The flow failure mode judgment method for the underground heat oil pipe in the high-water-content soil can be used for effectively carrying out flow failure probability calculation and failure mode judgment on the underground heat oil pipe in the high-water-content soil.

Description

technical field [0001] The invention relates to the technical field of pipeline system production safety, in particular to a method for judging flow failure modes of hot oil pipelines buried in high water content soil. Background technique [0002] The influence of rainfall, snowfall and paddy field irrigation on the critical transport is mainly manifested in the change of soil moisture and temperature. Quantitative evaluation of the influence of rainfall etc. on changes in soil thermophysical properties is very complicated, because this influence depends on the amount of precipitation and its duration, soil permeability, groundwater table and topography. In addition, after the rain stops, a complex process of moisture migration begins, which is caused not only by the inhomogeneity of humidity, but also by the existence of temperature gradients under the thermal action of the pipes. The thermal conductivity of soil is related to the temperature, density, porosity, humidity ...

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Application Information

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IPC IPC(8): G06F17/24
Inventor 兰浩张静楠徐波薛向东
Owner PIPECHINA SOUTH CHINA CO