Experimental research on frictional resistance of smart isolation tool during maintenance operation in offshore pipeline

Kang, Zhuang; Zhu, Xiaomin; Zhang, Shimin; Ding, Qingxin; He, Zongjian

doi:10.1108/ilt-09-2017-0276

Cited by 4 publications

(4 citation statements)

References 9 publications

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“…In the operation position, the seal rubbers of the plug head are axially compressed, and the radial expansion causes the isolation pressure between seal rubber and the pipe inner wall. 16 Mathematical models…”

Section: System Descriptionsmentioning

confidence: 99%

Research on the proportional-integral-derivative synchronous control method of the marine spherical isolation plug in the rotation process

Wang

Guo

Fan

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part M:

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The emergency pipeline repair technology is crucial to the maintenance and safety of pipelines under the emergency condition. In the offshore industry, the marine spherical isolation plug, a novel active plug device, is a significant emergency repair equipment of the hot tapping and line stop operation. In this article, the structure scheme and operation process of the marine spherical isolation plug are designed. A mathematic model is extracted from the proposed structure, and then the coordinates of the center of the spherical plug head is calculated using the D–H method. The displacements of the inserting hydraulic cylinder and the rotation hydraulic cylinder are investigated to provide the remote control data for the upper computer controller during the torsion process of the plug head. Moreover, a proportional-integral-derivative (PID) synchronous control method simulated by MATLAB is presented to reduce the rotation error of the plug head. To discuss the control strategy, a numerical model using ADAMS software is built. The results show that the error of the PID synchronous control method is more precise than that of the signal step-by-step control method; the number of steps of 90 is recommended in the actual operation. This article will provide theoretical guidance for the optimization design of the marine spherical isolation plug system.

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Section: System Descriptionsmentioning

confidence: 99%

Research on the proportional-integral-derivative synchronous control method of the marine spherical isolation plug in the rotation process

Wang

Guo

Fan

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part M:

Self Cite

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“…Pipelines have become the primary delivery systems for products, such as oil and gas [1,2]. However, pipelines are polluted by debris, such as black powder [3] and wax, hindering the regular operation and causing substantial economic losses [4].…”

Section: Introductionmentioning

confidence: 99%

Experimental Research Regarding the Flow Pattern and Pressure Drop in a Slurry Composed of Polypropylene-Particles

Fan,

Xu,

Fang

et al. 2023

Advances in Transdisciplinary Engineering

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Pipelines used for product transportation require regular cleaning. A new method has emerged using slurry for the cleaning process, during which the flow pattern and pressure drop in the slurry are essential. The flow of slurry containing polypropylene particles was investigated using a laboratory-scale, closed-circuit pipeline facility. While the slurry was pumped, the pressure drop was measured, and the flow pattern was observed regarding particle type, slurry particle concentration, and slurry flow velocity. The results showed that after the critical flow velocity, the particles mixed uniformly with the water in the pipe, increasing the pressure drop in conjunction with the flow velocity. Although a higher particle mass fraction and small particle size reduced the critical flow velocity, the mass fraction and particle size had no significant influence on the pressure drop. This research establishes a solid foundation for the practical application of this cleaning method.

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“…In-pipe intelligent plugging technology can repair pipeline leaks without interrupting transportation, greatly improving work efficiency. In addition, this approach can effectively complete the replacement of pipelines and valves, for the maintenance requirement of submarine pipelines [4].…”

Section: Introductionmentioning

confidence: 99%

Regulating Control of In-Pipe Intelligent Isolation Plugging Tool Based on Adaptive Dynamic Programming

Miao

Hong

2022

J. Pipeline Syst. Eng. Pract.

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In-pipe intelligent isolation plugging tools (IPTs) are crucial in pipeline maintenance. During the plugging process, the flow field around the IPT changes drastically, resulting in vibration and instability of the plugging process. Therefore, three foldable spoilers were designed at the tail of the IPT to reduce the vibration of the IPT. First, a disturbing flow experiment of IPT with spoilers was designed. A mathematical model of the pneumatic spoiler control system was established to regulate the spoiler angles. Second, based on the experimental data, a Bi-LSTM (bidirectional long short-term memory) neural network predictor between the plugging states, the spoiler angles, and the pressure gradient was established. Then, an adaptive dynamic programming controller was designed to select the optimal control action for each plugging state, thereby reducing the pressure gradient. Finally, Python and Matlab/Simulink were used for simulation. The results showed that the controller could reduce the pressure gradient during the plugging process by an average of 25.94%, which alleviated the vibration of the IPT and achieved a smooth plugging operation.

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Experimental research on frictional resistance of smart isolation tool during maintenance operation in offshore pipeline

Cited by 4 publications

References 9 publications

Research on the proportional-integral-derivative synchronous control method of the marine spherical isolation plug in the rotation process

Research on the proportional-integral-derivative synchronous control method of the marine spherical isolation plug in the rotation process

Experimental Research Regarding the Flow Pattern and Pressure Drop in a Slurry Composed of Polypropylene-Particles

Regulating Control of In-Pipe Intelligent Isolation Plugging Tool Based on Adaptive Dynamic Programming

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