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Tester for simulating washout conditions of flexible stand pipes of oil and gas fields

A flexible riser and test device technology, which is applied in the field of offshore oil equipment, can solve problems such as cumbersome calculation process, limited reference of erosion conditions of flexible risers in oil and gas fields, and inability to calculate erosion conditions, so as to reduce pollution and protect the environment.

Pending Publication Date: 2018-02-02
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method does not require physical experiments and reduces the economic cost to a certain extent, the calculation process is cumbersome and cannot directly reflect the erosion status of the pipeline, and cannot calculate the erosion status in complex situations.
At the same time, this method only considers the erosion and wear of rigid pipelines, and cannot accurately and effectively reflect the erosion and wear of offshore flexible risers, and has limited reference to the erosion of flexible risers in oil and gas fields.

Method used

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  • Tester for simulating washout conditions of flexible stand pipes of oil and gas fields
  • Tester for simulating washout conditions of flexible stand pipes of oil and gas fields
  • Tester for simulating washout conditions of flexible stand pipes of oil and gas fields

Examples

Experimental program
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Effect test

Embodiment 1

[0048] Under the condition that the diameter of the flexible hose is 8in and the test fluid medium is air, the erosion effect of sand particles on the pipeline is tested through this test device. When the sand particle size is 30μm, the sand delivery rate is 0.5kg / s, and the gas flow rate is 80m / s, the pipeline erosion accelerated test is continuously carried out for 7 days. After the test, samples were taken at 0°, 20°, 40°, 60°, and 80° of the pipe bend, and the samples obtained at the above positions were weighed and their thickness changes were measured.

[0049] According to the formula The relative material loss [kg / kg] can be calculated.

[0050] According to formula E m =E m,m m p The actual material loss rate [kg / s] can be calculated.

[0051] According to the formula The relative surface thickness loss [m / kg] can be calculated.

[0052] According to formula E L =E L,m m p The actual surface thickness loss rate [m / s] can be calculated.

[0053] According ...

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Abstract

The invention discloses a tester for simulating washout conditions of flexible stand pipes of oil and gas fields. The tester comprises an air blower, a gas speeding pipeline, a flexible pipeline, a dust remover and a pipeline support. The air blower, the gas speeding pipeline, the flexible pipeline and the dust remover are communicated sequentially. A hard jacket pipe sleeves the flexible pipeline. An opening is formed in the wall of the gas speeding pipeline, and is connected with a sand conveyor for externally providing sand. The pipeline support is formed by welding angle iron. The bottom of the pipeline support is fixed to the ground. The hard jacket pipe is supported on the pipeline support, and the portion is provided with a washout pipeline observation window. The tester has the advantages that the testing method is simple, the tester is convenient to operate, testing efficiency is high, the washout conditions of the sand to the inner walls of the pipelines during oil and gas delivery in the pipelines can be simulated accurately, and the tester is of great significance in judgment of the washout conditions and service life of the pipelines.

Description

technical field [0001] The invention relates to a test device for simulating erosion of flexible risers in oil and gas fields and a method for using the same, belonging to the technical field of offshore oil equipment. Background technique [0002] With the development of the world economy, the current amount of oil extraction on land is far from meeting the needs of human beings, so more and more countries are turning their attention to the ocean, which contains rich oil and gas resources. At present, the exploitation of marine energy is gradually entering the deep sea, and marine flexible risers are widely used in the transmission process of offshore oil and gas production. However, in the process of oil and gas production and transmission, there will inevitably be sand and other impurities. Therefore, during the use of flexible risers, sand and other impurities will cause erosion and damage to the inner wall of the pipeline, which may be damaged during oil and gas transpo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/56
CPCG01N3/567
Inventor 赵林郑中强路鑫
Owner OCEAN UNIV OF CHINA
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