Well casing integrity is vital for the safe operations of oil wells, and also significant to detect well casing defects. Magnetic Flux Leakage (MFL) Detection Technology is widely-used in detecting the defects of various pipelines. Owing to the very…
Electrical Capacitance Tomography (ECT) is a non-intrusive type of Process Tomography, which is used for obtaining information about the distribution of the contents of closed pipes by measuring variations in the dielectric properties of the material…
The large-scale pipeline transportation is main crude oil transport mode in China. Increases along with the active time, the steeliness pipeline surface has the corrosion phenomenon frequently, the petrochemical enterprise uses generally welds the…
The calibration of a multiphase flowmeter is usually highly dependent on the flow regime of the mixture being monitored. Since the flow regime present in a pipeline cannot always reliably be predicted, then online calibration of such instruments is…
At present, offshore drilling operations often use buttress thread casing as surface casing. The design conception of buttress thread casing is comes from the offshore drilling's demands and this kind of casing is mainly used as surface casing. This…
Development of deep water oil reservoirs are presently being considered in the Gulf of Mexico (GoM) where the flowline product temperatures is approaching 177degC (350degF), and the water depths are in excess of 3,050 m (10,000 ft). The installation…
This report describes a deperming technique for reducing the arc blow effect in DC welding of ferromagnetic pipelines. The technique is based on compensation of the axial field in the welding gap by a re-magnetization of the pipe near the joint. The…
Oil and gas pipelines are inspected for corrosion using magnetic flux leakage (MFL) inspection tools. It has been found that varying line pressure, bending or residual stresses cause changes in the MFL signals. Changes in the amplitude are thought to…
Well casing integrity is vital for the safe operations of oil wells, and also significant to detect well casing defects. Magnetic flux leakage (MFL) detection technology is widely-used in detecting the defects of various pipelines. Owing to the very…
The easy detection of fouling in duct systems is a persistent problem and remains a relevant demand for the chemical, oil, food and pharmaceutical industries. This work presents preliminary research results of vibrational hammer excitation for easy…
Well casing integrity is important for the safe operations of oil wells, and is of great significance to detect well casing defects. Magnetic Flux Leakage (MFL) Detection Technology is widely used to detect the defects of various pipelines. Because…
As the capabilities of multiphase flowmeters increase, the problems of how to validate the performance of such instruments on-line also increases. This paper considers the extent to which simple capacitance sensors could be used to determine the…
The main frame is a part of Marine Tensioner, which is used on the ship of laying oil pipeline in deep sea. The structural strength of the main frame must meet the requirements of Marine Tensioner, because its working load is larger. Analyzing the…
According to the mechanical and deformation characteristics of inverted triangular truss under seismic loads, the calculation model of truss dynamic response is established and the corresponding calculation equations are derived. Making use of finite…
After the completion of pipeline girth welding joint, the joint may be strengthened or softened and have high residual stress. Most of weld indies are acceptable, but when pipeline work under inner pressure conditions and the weld joint is…
At present the forepoling bolts of soil-nailed is widely used. A discrete two-dimensional (2-D) finite element model is developed. The contact behaviors between nails or bolts and soil are simulated by friction contact. The displacement of unstable…
The world demand of oil and gas is growing at an ever increasing rate, and as a result, there is a demand to explore new areas for more petroleum production. The arctic region is one of the remaining unexplored areas where such exploration still can…
The finite difference method is adopted to compute the axial velocity of coal water slurry (CWS) pipeline transport axial flow field flowing in the laminar flow, which could be described by Poisson partial differential equation. In this work, the…
In order to accurately determine the remaining strength of pipelines with corroded defects, this paper studied the B31G Code and theoretical basis of the finite element analysis. Aiming at piping pressure of the same pipeline with corroded defect, we…
In this paper, the vibrancies of floating assembled-pipeline on the sea was analyzed by the inherent vibrancies character analysis method and the FEM model was erected to simulate the landscape orientation bending vibration of the pipelines by ADINA…
Usually CNG vehicle is modified based on conventional vehicle in structure, the additional fuel system is very heavy due to its gas and structure, which increases the danger of potential gas leakage and explosion. Therefore the safety and reliability…
A large-scale low-temperature aboveground LNG storage tank design is described in detail, especially the process of prestressing tendons configuration using finite element method (FEM). Considering the LNG storage tanks working conditions and…
Work is devoted to the analysis of multilayer polymer pipes application in the Oil and Gas Industry, and calculation of their stress-strain state using the finite element method (FEM).
According to the report of the United States transportation department, mechanical damage is one of the most important reasons for the pipeline accident. The most typical form of mechanical damage is indentation. Dent defect is one of the important…
The large-scale pipeline transportation is main crude oil transport mode in China. Increases along with the active time, the steeliness pipeline surface has the corrosion phenomenon frequently, the petrochemical enterprise uses generally welds the…
The increased focus on LNG as a vital part of the energy equation around the world has resulted in the development of new concepts for the export, reception, storage, and vaporization of LNG. The offshore located gravity based structures…
A decoupled algorithm which combines finite-element and finite-volume method (FEM & FVM) for reservoir simulation is presented in the paper. The governing equations of fluid flowing in porous medium are decoupled to solve unknown parameters of…
Based on mesomechanics of concrete, the big recycled aggregate-filled Concrete is regarded as a type of three-phase composite heterogenous material composed of big recycled aggregate, self-compacted concrete and interfacial transition zone(ITZ).…
An improved Gauss-Newton-Marquardt (GNM) algorithm is proposed in the paper for displacement back analysis of casing external loads in salt stratum to optimize the solution based on traditional GNM algorithm. In the improved GNM algorithm, the direct…
Simplified theoretical method is used first to calculate the intensity on the wall of storage tank, and then FEM technique is applied to numerical calculation of levels and distributions of stress and strain on the same one. A results comparison…
The three-dimensional distributing discipline of additional stress and settlement of homogeneous soil is studied by using finite element method, for the foundation of good-sized oil storage tank. The finite element results are proved reliable and…
A large-scale low-temperature aboveground LNG storage tank design is described in detail, especially the process of prestressing tendons configuration using finite element method (FEM). Considering the LNG storage tanks working conditions and…
Work is devoted to the analysis of multilayer polymer pipes application in the Oil and Gas Industry, and calculation of their stress-strain state using the finite element method (FEM).
The large crude oil storage tank with a capacity of 10104 m3 has been widely used in China currently. In order to obtain the stress distribution in the wall board, bottom board, big fillet weld and manhole, and to verify the rationality of tank…