Stress and strain analysis of spherical sealing cups of fluid-driven pipeline robot in dented oil and gas pipeline

Zhang, Hang; Dong, Jinhui; Cui, Can; Liu, Shuhai

doi:10.1016/j.engfailanal.2019.104294

Cited by 38 publications

(13 citation statements)

References 22 publications

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“…(4) Great level of protection: There is no need to be concerned about the pipe camera's quality because it has a high level of protection, airtight protection, and the material is waterproof, anti-rust, and corrosion resistant.. (5) Receiving and releasing cables won't interfere with one another with a high-precision cable reel, and the length is configurable. The pipe inspection robot can inspect pipelines with diameters ranging from 100 mm to 2000 mm.…”

Section: Journal Of Artificial Intelligence and Systemsmentioning

confidence: 99%

Robotic Inspection Monitoring System for Pipelines

Baballe¹

2022

AIS

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The most popular method for transporting fluids and gases is through pipelines nowadays. Regular inspection is necessary for the pipelines to work correctly. Humans must not enter potentially dangerous environments to inspect these pipelines. As a result of this, pipeline robots came into existence. These pipe inspection robots help in pipeline inspection, protecting numerous people from harm since human beings cannot enter the pipes and inspect them in case there is any such or kind of damage that requires repair. Despite numerous improvements, pipeline robots still have several limitations. The introduction of this in pipe inspection robots helps to solve many problems, such as leakage of the gas or fluid pipelines, rustiness, and also if the pipe is broken from any part.

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Section: Journal Of Artificial Intelligence and Systemsmentioning

confidence: 99%

Robotic Inspection Monitoring System for Pipelines

Baballe¹

2022

AIS

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“…The concept can be defined by sealing performance, driving performance, and collision possibility. Zhang et al 15 studied the stress and strain on the outer edge of the cup in a dented pipe and concluded that the thickness of the cup has the greatest impact on the stress and strain distribution. Cao et al 16 combine theoretical analysis and numerical simulation to analyze the compressive stress on the contact area when the PIG runs in straight pipe, elbow, and anomaly.…”

Section: Introductionmentioning

confidence: 99%

Deformation and stress analysis of cup on pipeline inspection gauge based on reverse measurement

Chen¹,

Qiu²,

Yang

2022

Energy Science & Engineering

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The pipeline inspection gauge (PIG) is one of the most significant gauges in the field of oil-gas storage and transportation. It is essential to use PIG to clean and detect petroleum and natural gas pipelines. Predicting the deformation and stress distribution of the cup on the PIG is essential before pigging. To enhance these predictions, especially the deformation of the cup, a method for measuring the deformation of the cup based on reverse measurement was introduced and a novel finite element (FE) simulation model for investigation of the deformation of cups was proposed and verified in this paper. The point cloud data of the cup before and after entering the pipe can be obtained by the three-dimensional (3D) laser scanner. Comparing the obtained point cloud data can measure the deformation of the cup. In addition, a 3D FE model was created to predict the deformation of the cup and the effective stress on the contact area. The result shows that there is a linear relationship between circumferential deformation and interference, while there is a nonlinear relationship between axial deformation, effective stress, and interference.These results provide a better understanding of the complex behavior of PIG during pigging.

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“…The factors affecting the sealing performance of PIG crossing elbows were evaluated. A lot of relative studies are also reported for pigging, where the contact performance and stress response of rubber were studied 16–19 …”

Section: Introductionmentioning

confidence: 99%

Numerical investigation on sealing performance of drainage pipeline inspection gauge crossing pipeline elbows

Jiang

Zhang

et al. 2021

Energy Science & Engineering

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A pipeline inspection gauge (PIG) is routinely passed throughout the long‐distance oil and gas pipelines by pipeline operators to clean the pipeline. Sealing performance is a significant evaluation index for PIG's safety operation. To comprehensively evaluate the PIG's seal performance, nonlinear finite element models were developed, and parametric analysis was conducted in this study. The accuracy of simulation model was validated from numerical and experimental results reported in the literature. The results show that comparing with the pigging in straight pipes, the sealing rubber cups of PIGs can be more easily detached from the pipe wall when passing through elbows, causing smaller sealing areas. For a typical elbow (with curvature radius equals to six times of pipe diameter) widely used in pipeline industry, the minimum sealing area of rubber cup is only 8.07% during common operation conditions. The sealing ability of rubber cups can be obviously enhanced by increasing the curvature radius for the pigging operation of small curvature elbow. Elbow radius slightly affects the cup's sealing behavior when the curvature radius is over six times of pipe's outer diameter. An increment in sealing cup interference can increase the contact area between cup and pipe wall, and the blockage risk of PIGs will be reduced due to the good sealing ability and sufficient driving force. The minimum interference required for the cups is 4% under a most common operation condition; that is, the sealing cup thickness, fluid pressure difference, and friction coefficient are 35 mm, 0.02 MPa, and 0.3, respectively. A proper decrease in sealing cup thickness will reduce the stiffness of rubber cups, indicating that the cups with a smaller thickness are more prone to deformation. Thus, an increase in differential pressure over PIG can enhance the sealing performance of cups when the cups are separated from pipe wall. A large friction coefficient is risky for a safe pigging due to the decrease in sealing region with the increase in friction coefficient. In engineering practice, proper measures should be taken to reduce friction force. Above all, the results obtained in this study provide a reference for the structural design of PIGs.

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Stress and strain analysis of spherical sealing cups of fluid-driven pipeline robot in dented oil and gas pipeline

Cited by 38 publications

References 22 publications

Robotic Inspection Monitoring System for Pipelines

Robotic Inspection Monitoring System for Pipelines

Deformation and stress analysis of cup on pipeline inspection gauge based on reverse measurement

Numerical investigation on sealing performance of drainage pipeline inspection gauge crossing pipeline elbows

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