Free spanning submarine pipeline information calculation method based on ROV survey data

A technology for surveying data and pipeline information, applied in electrical digital data processing, special data processing applications, calculations, etc., can solve the problems of long duration, high ROV survey costs, etc., and achieve the effect of improving scientificity

Inactive Publication Date: 2016-10-26
INST OF MECHANICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

This patented technology helps predict how well an underwater pipe line will behave when it'll break down due to corrosion or other factors that may affect its functioning properly over time. It also includes methods for analyzing mechanical properties like tensile strength and bending stiffness during use. By comparing these measurements with actual results from different types of experiments on the same type of material, researchers are able to make informed decisions about whether there should be repairs before they fail completely.

Problems solved by technology

The technical problem addressed in this patents relates to evaluating the risk associated with changing environmental factors such as sea water levels that may cause subsidence issues affecting the safe handling of crude petroleum products like liquid natural gas (LNG).

Method used

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  • Free spanning submarine pipeline information calculation method based on ROV survey data
  • Free spanning submarine pipeline information calculation method based on ROV survey data
  • Free spanning submarine pipeline information calculation method based on ROV survey data

Examples

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Embodiment 1

[0040] Example 1: Participation figure 1 , a method for calculating the information of submarine spanning pipelines based on ROV survey data, including the following steps:

[0041] Step 1: Determine the main factors affecting the state of the suspended spanning pipeline, mainly seabed topography data, seabed sand quality parameters, pipeline laying parameters, pipeline section parameters, weld treatment quality, expansion ring distribution, water flow and temperature along the pipeline.

[0042] Step 2: adopt vector finite element method, set up the finite element model of pipeline structure, calculate pipeline structure; the optimal method of described pipeline structure calculation is vector finite element nonlinear space beam element, comprising the following steps:

[0043] A. Discretize the structure with a mass point and a unit connecting the mass points;

[0044] B. Set the initial position and initial velocity of each particle, and set the initial internal force of each

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Abstract

The present invention discloses a free spanning submarine pipeline information calculation method based on ROV survey data. The method comprises the steps of determining main factors influencing a free spanning submarine pipeline, establishing a pipeline structure finite element model, establishing a pipeline and seabed contact interactional model, inverting the ROV survey data, and calculating displacement, stress and strain distribution information of the pipeline under the current operating condition. Current accurate information of the free spanning submarine pipeline is obtained, free spanning state change caused by operation condition change and the influence on pipeline safety are eliminated, and scientificity of free spanning submarine pipeline safety evaluation is further improved.

Description

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Claims

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Application Information

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Owner INST OF MECHANICS - CHINESE ACAD OF SCI
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