Stress corrosion experimental method for full-scale marine oil and gas pipeline

An oil and gas pipeline, stress corrosion technology, applied in the direction of weather resistance/light resistance/corrosion resistance, measuring devices, instruments, etc., can solve the problems of lack of bending moment load application function, limitation of load types, etc., to achieve the effect of improving experimental efficiency

Active Publication Date: 2017-07-14
TIANJIN UNIV
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Problems solved by technology

[0004] 1. Most of them are experimental test methods for scaled-scale pipes, and there are few experimental methods for full-scale pipes. For example, the application numbers are CN101226135A, CN10 5136596A, etc., all of which are based on scaled-scale pipe specimens or material research Corrosive properties
[0005] 2. The type of load applied in the exper

Method used

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  • Stress corrosion experimental method for full-scale marine oil and gas pipeline
  • Stress corrosion experimental method for full-scale marine oil and gas pipeline
  • Stress corrosion experimental method for full-scale marine oil and gas pipeline

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[0043] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings:

[0044] Such as figure 1 As shown, the full-scale marine engineering pipeline corrosion experiment equipment is mainly used to measure the state change of the full-scale experimental pipeline 8 in seawater corrosion solution under the condition of applying complex loads, including: axial load loading devices 1, 2, 5. Torsional load loading devices 6, 7, bending load loading devices 11, 14, 15, 16, corrosion test water tanks 9, 10, 12, 13, pipeline fixing devices 17, 19, 20, 21, 22, 23, 24, The experimental equipment fixes the heat preservation outer wall 18. Among them, the corrosion test water tank 10 and the corrosion test water tank 13 are sealed with the test pipe 8 through anti-corrosion rubber gaskets. The test pipe 8 and the axial load and torsion load loading device are connected by flanges 3 and 4, and the test pipe 8 and The bending l...

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Abstract

The invention relates to a stress corrosion experimental method for a full-scale marine oil and gas pipeline. An experimental device adopted by the method comprises an axial loading device, a torsional loading device, a bending loading device, two corrosion experimental water tanks (10 and 13), a pipeline fixing device and an outer wall 18. The experimental method comprises the following steps: preparing an experimental water sample and a reference water sample; controlling the temperature and humidity; connecting a connecting data line of a stress sheet to a stress measuring instrument and controlling the concentrations of oxygen in an experimental box and a reference box; according to experimental requirements, applying an axial load, a torsional load, a bending load or a complicated load; reading a stress numerical value by means of a stress measuring instrument and calculating a stress value; and researching influence of a single variable on an experimental pipeline by means of a method of controlling variables, including oxygen concentration, of the experimental box and the reference box.

Description

technical field [0001] The invention relates to an experimental method for simulating the corrosion process of ocean engineering pipelines under complex load conditions. Background technique [0002] In the offshore oil and gas production system, underwater structures such as oil and gas transmission pipelines account for a considerable proportion of the total offshore oil and gas investment, especially in deep sea development where oil fields are far away from land, and the proportion of investment in the transmission system will be even higher, such as the Canyon in the Gulf of Mexico. The water depth of the Express gas field is 2,225 meters, and the pipeline is 100 kilometers long; the Liwan 3-1 gas field in the South my country Sea has a water depth of 1,480 meters. It is planned to use multiple deep-water manifolds to transport the collected natural gas to the shallow water area through a 75-kilometer-long pipeline The central platform for processing and so on. Therefore...

Claims

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Application Information

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IPC IPC(8): G01N17/00G01N3/02
CPCG01N3/02G01N17/00G01N2203/0026
Inventor 余建星郭帅余杨陈达兴李响齐凯薛陆丰
Owner TIANJIN UNIV
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