An Effective Computational Parametric Appraoch for Optimization of Adhesively Bonded Tubular Joints Subjected to Torsion Loading

2006 ◽  
Author(s):  
Ramin Hosseinzadeh ◽  
Nader Cheraghi ◽  
Farid Taheri
Keyword(s):  
Finite Element ◽  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Design Parameters ◽  
Loading Conditions ◽  
Adhesively Bonded ◽  
Gas Industry ◽  
Tubular Joints ◽  
Composite Pipes ◽  
Joint Length

Due to their low manufacturing cost, low stress concentration and ease of maintenance, adhesively bonded joints are now one of the most commonly and widely used joining systems in various industrial applications. As the use of composites gains popularity in oil and gas industry, the use of such joints for joining composite pipes is also gaining demand. The design and analysis methodologies applied to these joints under different loading conditions are however non-standard and rather controversial. The inherently complicated equations governing the behaviour of these joints have also impeded their use among the design engineers. As stated, however, as the use of composite pipes gains more popularity in oil and gas industry, the need for standardization of the methodology used for designing such joints becomes more essential. This paper discusses the details of 2D axis-symmetric and full-3D finite element models developed using the ABAQUS commercially available FEM software [1] for modeling and characterizing a series of adhesively bonded tubular joints used in isotropic and orthotropic pipes. The parametric script module of ABAQUS was used to systematically investigate the influence of several design parameters (such as the adhesive thickness, joint length, joint diameter, pipe material, and loading conditions), which govern the performance of such joints. The influence of various parameters specific to composite pipes (including the effect of laminate stacking sequence) was also investigated. Generated from the investigations was a set of useful design curves that provide the relationships among the parameters governing the behaviour of the joints. An important feature of the approach is its ability to establish the most optimized and effective joint length. The integrity of the optimization procedure was evaluated by comparing the response of the joints designed based on the developed design curves with those analyzed in detail by the finite element method (FEM).

Stress Concentration Factors Calculation: Analytical and Numerical Approaches for Welded Tubular Joints

2020 ◽  
Author(s):  
Nathalia Paruolo ◽  
Thalita Mello ◽  
Paula Teixeira ◽  
Marco Pérez
Keyword(s):  
Stress Concentration ◽  
Oil And Gas ◽  
Hot Spot ◽  
Experimental Tests ◽  
Oil And Gas Industry ◽  
Offshore Structures ◽  
Gas Industry ◽  
Tubular Joints ◽  
Concentration Factors ◽  
Stress Concentration Factors

Abstract In the oil and gas industry, fixed platforms are commonly applied in shallow water production. In-place environmental conditions generates cyclic loads on the structure that might lead to structural degradation due to fatigue damage. Fatigue is one of the most common failure modes of offshore structures and is typically estimated when dimensioning of the structure during design phase. However, in times when life extension of existing offshore structures is being a topic in high demand by industry, mature fields may represent an interesting investment, especially for small companies. Concerning fixed platforms, composed mainly by welded tubular joints, the assessment of hot spot stresses is considered to predict structure fatigue. The estimation of welded joint hot spot stresses is based on the stress concentration factors (SCFs), which are given by parametric formulae, finite element analysis (FEA) or experimental tests. Parametric formulae may be defined as a fast and low-cost method, meanwhile finite elements analysis may be time consuming and experimental tests associated with higher costs. Given these different characteristics, each method is applied according to the study case, which will rely on the joint geometry and associated loads. Considering simple joint geometries several sets of parametric equations found in the literature may be applied. On the other hand, the SCFs calculation of non-studied yet complex joints consider known formulae adapted according to the under load joint behavior and geometry. Previous analysis shows that this adaptation may furnish different results compared to those obtained by FEA. Furthermore, it is observed that even for simple joints the results derived from the different methods may differ. Given their importance for the oil and gas industry, since they are the basis for the assessment of the fatigue life of welded tubular joints which may impact on additional costs related to maintenance and inspection campaigns, the estimation of SCFs must be the most accurate as possible. Therefore, this paper intends to investigate the differences between results derived from parametric formulae and different FEA studies.

Russian Scanners for Eddy Current Testing of Drilling Pipe Elements in the Oil and Gas Industry

NDT World ◽  
2020 ◽  
pp. 5-8
Author(s):  
Aleksandr Kazachenko
Keyword(s):  
Control Charts ◽  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Complex Problem ◽  
Point Of View ◽  
Destructive Testing ◽  
Gas Industry ◽  
Shewhart Control ◽  
Inspection Process ◽  
Composite Pipes

Composite materials appear to be an ideal solution to a complex problem with conflicting conditions: how to simultaneously obtain sufficient strength, reliability and durability of the structure, while providing the minimum possible mass of it. However, non-destructive testing of products from them raises more and more questions. In the mass production of composite pipes for pipelines, the only possible option from the point of view of ensuring the necessary reliability, information capacity of the results of the performed inspection of products and productivity is the automation of the inspection process, which includes special methods for identifying defects. Statistical methods, including capability ratio and Shewhart control charts, should be used to estimate the error in determining the size of defects.

Prediction of Burst Pressure of Pipes With Geometric Eccentricity

2015 ◽  
Vol 137 (6) ◽  
Author(s):  
Zhanfeng Chen ◽  
Weiping Zhu ◽  
Qinfeng Di ◽  
Wenchang Wang
Keyword(s):  
Finite Element ◽  
Function Method ◽  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Element Model ◽  
Burst Pressure ◽  
Gas Industry ◽  
Tresca Criterion ◽  
Special Case ◽  
Theoretical Results

An analytical model was proposed in this paper to predict the burst pressure of a pipe with geometric eccentricity. With application of the complex elastic potential function method in a bipolar coordinate system, the authors first derived an analytical solution of stresses in an eccentric pipe and then obtained the formula of predicting burst pressure by combining the solution with the Tresca criterion. Finally, the effect of eccentricity and the ratio of thickness to diameter of pipe on burst pressure were discussed. Our results show that a slight eccentricity can significantly decrease the burst pressure. In the special case of zero-eccentricity for a concentric pipe, our model yields results that are consistent with experiments data published by others and theoretical results predicted by models proposed by other researchers without considering the effect of eccentricity. In the case of eccentricity for an eccentric pipe, the calculating results of our model are also consistent with that of finite element model (FEM). The theoretical model and results presented in this paper have a broader application in predicting the burst pressure for pipes commonly used in oil and gas industry.

Joining Composite Pipes Using Hybrid Heat-Activated Coupling and Adhesive Bonding

2001 ◽  
Author(s):  
Guoqiang Li ◽  
Su-Seng Pang ◽  
Randy J. Jones ◽  
Jack E. Helms ◽  
Eyassu Woldesenbet
Keyword(s):  
Internal Pressure ◽  
Adhesive Bonding ◽  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Offshore Platforms ◽  
Gas Industry ◽  
Critical Technology ◽  
Offshore Oil And Gas ◽  
Composite Pipes ◽  
Offshore Oil

Abstract Deepwater activities are the future of the Offshore Oil and Gas Industry. Huge reserves have been located in the Gulf of Mexico as well as off the Coast of West Africa and Brazil. The development of floating production platforms and vessels offers challenges to the facilities engineer who must consider new materials to meet stringent topsides weight limitations. A critical technology for facilities piping in offshore platforms is joining technique. This paper discusses the development of a hybrid joining approach by using heat-activated coupling and adhesive bonding. The technique procedure is presented via specimen fabrication. A total of eleven coupled specimens are prepared and evaluated using standardized internal pressure tests. The feasibility of this new joining technique in offshore piping is discussed based on the internal pressure test results.

Finite Element Investigation on the Tensile Armor Wire Response of Flexible Pipe for Axisymmetric Loading Conditions Using an Implicit Solver

2018 ◽  
Vol 140 (4) ◽  
Author(s):  
Alireza Ebrahimi ◽  
Shawn Kenny ◽  
Amgad Hussein
Keyword(s):  
Finite Element ◽  
Oil And Gas ◽  
Mechanical Response ◽  
Numerical Models ◽  
Oil And Gas Industry ◽  
Parameter Study ◽  
Loading Conditions ◽  
Flexible Pipe ◽  
Axisymmetric Loading ◽  
Implicit Solver

Composite flexible pipe is used in the offshore oil and gas industry for the transport of hydrocarbons, jumpers connecting subsea infrastructure, and risers with surface platforms and facilities. Although the material fabrication costs are high, there are technical advantages with respect to installation and performance envelope (e.g., fatigue). Flexible pipe has a complex, composite section with each layer addressing a specific function (e.g., pressure containment, and axial load). Continuum finite element modeling (FEM) procedures are developed to examine the mechanical response of an unbonded flexible pipe subject to axisymmetric loading conditions. A parameter study examined the effects of: (1) pure torsion, (2) interlayer friction factor, (3) axial tension, and (4) external and internal pressure on the pipe mechanical response. The results demonstrated a coupled global-local mechanism with a bifurcation path for positive angles of twist relative to the tensile armor wire pitch angle. These results indicated that idealized analytical- and structural-based numerical models may be incomplete or may provide an accurate prediction of the pipe mechanical response. The importance of using an implicit solver to predict the bifurcation response and simulate contact mechanics between layers was highlighted.

Quality Control of Composite Material Pipes by Infrared Thermography

2012 ◽  
Vol 188 ◽  
pp. 140-143 ◽  
Author(s):  
Alexandrina Mihai ◽  
Florin Ştefănescu ◽  
Gigel Neagu ◽  
C.P. Mihai
Keyword(s):  
Infrared Thermography ◽  
Oil And Gas ◽  
High Reliability ◽  
Stress Test ◽  
Oil And Gas Industry ◽  
Gas Industry ◽  
Before And After ◽  
Reference Images ◽  
Composite Pipes ◽  
The Impact

The paper presents some aspects concerning the use of infrared thermography (IRT) in the evaluation of composite pipes integrity. Composite pipelines made up of glass fibres reinforced epoxy resins are increasingly used, especially in oil and gas industry, for their good mechanical properties, combined with reduced weight and excellent behaviour under hostile environment conditions. Taking into account that high reliability is required for such pipe networks, it is mandatory to choose reliable non-destructive inspection (NDI) methods to achieve efficient structural health monitoring. The main advantages of the IRT inspection are: non-contact and non-dangerous examination. In order to characterize the integrity of composites pipes, first of all the researches were interested in obtaining a set of reference images and then to examine the samples before and after the impact stress test. The conclusions point out the schemes and the optimal parameters of evaluation as well as the application limits of thermographic inspection

Application of computer technologies and their potential to develop geophysical mapping

2021 ◽  
Vol 973 (7) ◽  
pp. 9-20
Author(s):  
D.S. Loginov
Keyword(s):  
Oil And Gas ◽  
Layer Structure ◽  
Oil And Gas Industry ◽  
Geographic Information ◽  
Design Parameters ◽  
Gas Industry ◽  
Software Products ◽  
Main Work ◽  
Publishing Program ◽  
Thematic Cartography

The author describes four main work directions of creating geophysical maps using modern software, represented by specialized systems (SSS) and geographic information ones (GIS). The technological features of data processing practice stages and creating geophysical fields’ digital models, the compilation and designing geophysical maps’ thematic content as results of geological and geophysical works are considered. The main tasks of combined use of GIS and SSS tools were identified. To overcome these shortcomings, additional tools were developed for ArcGIS, as the leading system in the oil and gas industry. They ensure the preservation of design parameters for color scales adopted in the SSS; automatic calculation of the labels’ rotation angle to the objects of point localization; maintaining the layer structure of map projects at exporting to publishing program formats. The solutions considered in the article can be applied for compilation and design of isoline maps in some other areas of thematic cartography, and can also contribute to improving the cartographic component of domestic geological and geophysical software products and geographic information systems.

scholarly journals ANALISIS KEKUATAN GATE VALVE 2 9/16 3.000 PSI AKIBAT TEKANAN FLUIDA MENGGUNAKAN FINITE ELEMENT ANALYSIS SOLIDWORKS 2018

2020 ◽  
Vol 5 (1) ◽  
pp. 21
Author(s):  
Bisma Herlambang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Safety Factor ◽  
Gate Valve ◽  
Oil And Gas ◽  
Fluid Pressure ◽  
Oil And Gas Industry ◽  
Element Analysis ◽  
Gas Industry ◽  
And Control

<p><em>Valve (valve) as one of the industrial products, is needed by companies engaged in controlling fluid flow for efficiency. This need is widely used by power companies and the oil and gas industry. The purpose of using valves is to limit and control liquids under high pressure conditions. One valve that is often used is the gate valve, which is a valve with a type of motion fully open and fully close. The demand for this gate valve requires a product with certain specifications to have a design with a good level of strength. In other words, a good valve product (valve), must have a good strength, safe and in accordance with the needs to be tested. This study aims to analyze the gate valve 2 9/16 WP 3,000 psi to ensure the valve produced is according to specifications, strong and resistant to fluid pressure. The method used is Finite Element Analysis (FEA) with the 2018 Solidworks software. The analysis is performed on the gate valve with a full open, full closed state and with gradual loading starting at 1,000 psi, 2,000 psi and 3,000 psi resulting from Computational Fluid Dynamics (CFD). The analysis was carried out at 300C, Based on the results of the analysis with FEA, it was stated that the gate valve 2 9/16 WP 3,000 psi was strong and safe to use. The safety factor value is significantly higher than the minimum permissible safety factor value.</em></p>

scholarly journals Effect of Eccentricity in Microwave Imaging of Multiple Composite Pipes

2021 ◽  
Vol 15 ◽  
pp. 30-38
Author(s):  
Yuki Gao ◽  
Noshin Raisa ◽  
Reza Amineh
Keyword(s):  
Oil And Gas ◽  
Low Cost ◽  
Near Field ◽  
Oil And Gas Industry ◽  
Microwave Imaging ◽  
Destructive Testing ◽  
Material Loss ◽  
Gas Industry ◽  
Additional Imaging ◽  
Composite Pipes

The use of non-metallic composites that are durable, low cost, and lightweight is growing fast in various industries. A commonly used form of these materials is in the shape of pipes that can be used, for instance, in oil and gas industry. Such pipes can be damaged due to material loss (defects and holes), erosions, and more which may cause major production failures or environmental mishaps. To prevent these issues, non-destructive testing (NDT) methods need to be employed for regular inspections of such components. Since traditional NDT methods are mainly used for metallic pipes, recently microwave imaging has been proposed as a promising approach for examination of non-metallic pipes. While microwave imaging can be employed for inspection of multiple layers of pipes, the effect of undesired eccentricity of the pipes can impose additional imaging errors. In this paper, for the first time, we study the effect of eccentricity of the pipes on the images reconstructed using near-field holographic microwave imaging when imaging double pipes.

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