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Deepwater top tensioned riser unity coupling dynamic analysis method

A dynamic analysis and top-tensioning technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as unequal pressure, unequal tension and compression stiffness, and unequal dynamic response

Inactive Publication Date: 2017-06-30
OCEAN UNIV OF CHINA
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this design analysis method has the analysis defects of unequal tension and compression stiffness, unequal pressure, and unequal dynamic response, which seriously affects the safety of the riser.

Method used

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  • Deepwater top tensioned riser unity coupling dynamic analysis method
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  • Deepwater top tensioned riser unity coupling dynamic analysis method

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Embodiment Construction

[0037] The present invention will be further described below in conjunction with the drawings.

[0038] Such as figure 1 As shown, it is a cross-sectional view of the deep-water top-tensioning direction. It can be seen from the figure that the deep-water top-tensioning riser is a concentric pipe-in-pipe structure with three steel pipes of different diameters set together. The innermost layer is oil pipe 1, the middle and The highest level is the riser. Tubing 1 is used for oil production, the inner riser 2 is a gas lift line, and the outer riser 3 is a riser, which is the main structure that bears marine environmental loads. In order to prevent the collision between the pipe and the pipe and transfer the load, a guide ring 4 is set between the oil pipe and the inner riser and between the inner riser and the outer riser.

[0039] At present, the commonly used top-tensioned riser pipe is 4.5 inches, the middle riser is 8-9 inches, and the outer riser is 12-13 inches. The greater t...

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Abstract

The invention relates to the technical field of pipeline analyses of oil and gas development projects, in particular to a deepwater top tensioned riser unity coupling dynamic analysis method. The method comprises the following steps that the finite element models of an oil pipe, an inner layer riser and an outer layer riser are established respectively; mass matrix elements and stiffness matrix elements of each pipe model are calculated respectively to form the mass matrix and stiffness matrix of each pipe model; the natural frequency and mode of vibration of each pipe are calculated; according to the marine environment conditions of an actual engineering sea area, the frequency of vortex induced lift and pulsating drag force is calculated. According to the method, the actual force and deformation state of the lateral vibration of the top tensioned riser are described correctly, and the correct analysis method is put forward.

Description

Technical field [0001] The invention relates to the technical field of pipeline analysis for oil and gas development engineering, in particular to a fully coupled dynamic analysis method for a deep-water top-tension riser. Background technique [0002] The deep-water top-tension riser is a concentric pipe-in-pipe structure composed of three steel pipes of different diameters. The innermost layer is the oil pipe, and the middle and outermost layers are the riser. [0003] At present, the commonly used top-tensioned riser pipe is 4.5 inches, the middle riser is 8 to 9 inches, and the outer riser is 12 to 13 inches. The greater the water depth, the larger the diameter of the middle and outer risers. For such a pipe-in-pipe structure, waves and sea currents act on the surface of the outer riser pipe in diameter, while the inner riser and oil pipe are subjected to external loads through the guide rings respectively arranged between the two layers of pipes. [0004] The role of deep-wate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/23G06F2113/14G06F2119/06
Inventor 黄维平宋虹付学鹏
Owner OCEAN UNIV OF CHINA
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