Test method for external pressure resistance of steel pipe for submarine pipeline

A test method and technology for steel pipes, which are used in the application of stable tension/pressure to test the strength of materials, use of liquid/vacuum for liquid tightness measurement, measurement devices, etc. The test of external pressure resistance of steel pipes for submarine pipelines has achieved the effect of optimizing design specifications, ensuring strength, and improving accuracy

Inactive Publication Date: 2019-01-08
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

None of the above relevant patents involves the external pressure resistance test of steel pipes for submarine pipelines, and there is no relevant statement on the means and methods of external pressure test of pipeline steel pipes

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  • Test method for external pressure resistance of steel pipe for submarine pipeline
  • Test method for external pressure resistance of steel pipe for submarine pipeline

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Embodiment Construction

[0034] The present invention is described in further detail below in conjunction with accompanying drawing:

[0035] The present invention takes the compression performance test of X70 φ914×36.5mm straight seam submerged arc welded steel pipe under the external pressure of 35MPa as an example in the deep sea pipeline.

[0036] (1) Select test equipment

[0037] The test equipment is a deep-sea high-pressure simulation test chamber 1, which is connected with a data acquisition system 2, a video monitoring system 3 and a hydraulic control system 4; figure 1 It can be seen that the deep-sea high-pressure simulation test cabin 1 is placed in the test pit, and the top of the deep-sea high-pressure simulation test cabin 1 is equipped with a high-voltage camera 5 and a high-voltage lighting lamp 6, and the bottom is provided with an in-chamber slide rail 7 for installing steel pipe specimens. And discharge port 8, the outside is equipped with exhaust port safety valve 9.

[0038] T...

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Abstract

The invention discloses a test method for the external pressure resistance of a steel pipe for a submarine pipeline. The test method mainly includes selection of test equipment, design of a steel pipespecimen, test of the sealing performance of the steel pipe specimen, test of the external pressure resistance of the steel pipe specimen and evaluation of the external pressure resistance of the steel pipe specimen. The test method is mainly applicable to the test of the external pressure resistance of the steel pipe for the submarine pipeline under the external pressure load of surrounding environmental water, especially for the test of the external pressure resistance of a high-strength thick-walled steel pipe for a deep-sea pipeline within the water depth of 3500 meters or less. Through adoption of the method, physical verification and test analysis of the external pressure resistance of the steel pipe for the deep-sea pipeline can be realized; comprehensive performance evaluation ofindexes such as mechanical properties and appearance geometric dimensions of the steel pipe for the submarine pipeline can be realized; and the test result play an important guidance role in the design and control of indexes such as materials, wall thicknesses, mechanical properties and appearance dimensions of steel pipes for submarine pipeline projects.

Description

Technical field: [0001] The invention belongs to the safety and reliability performance testing technology of steel pipes for submarine pipelines, and mainly relates to a method for testing the external pressure resistance performance of steel pipes for deep sea pipelines. The external pressure resistance test is especially suitable for the external pressure resistance test of high-strength thick-walled steel pipes for deep-sea pipelines with a water depth of less than 3,500 meters. Background technique: [0002] The global marine oil and gas resources are abundant. Offshore oil and gas resources are mainly distributed on the continental shelf, accounting for about 60% of the global ocean oil and gas resources. Among the proven reserves, the shallow sea still dominates at present. However, with the advancement of oil exploration technology, the focus of oil exploration in the world has shifted from land to sea in recent years, and from shallow sea to deep sea. The explorati...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M3/04G01N3/12
CPCG01M3/04G01N3/12G01N2203/0019G01N2203/0048G01N2203/0274
Inventor 牛爱军毕宗岳刘云牛辉赵勇黄晓辉焦炜杨耀彬田磊张万鹏刘斌席敏敏赵红波包志刚李超
Owner BC P INC CHINA NAT PETROLEUM CORP
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