The three-dimensional simulation analysis of dynamic response on perforated strings

2018 International Conference on Material Strength and Applied Mechanics

材料科学;力学

Li, M.F.^1 ; Liu, H.F.^1 ; Dou, Y.H.^1 ; Cao, L.H.^1 ; Liu, Y.X.^1

Northwestern Polytechnical University, School of Mechanical Engineering, Xi'an, China^1

关键词: Equivalent stress;    Impact loads;    Length and wall thickness;    Tensile axial forces;    Thick-walled;    Three-dimensional simulation analysis;    Tubular strings;    Vibration displacements;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/372/1/012045/pdf
DOI  :  10.1088/1757-899X/372/1/012045

来源: IOP

【 摘 要 】

It analyzes the dynamic response and stresses of perforating tubular string to detonating impact load in oil-gas well in ANSYS, obtains the response of vibration displacement, velocity and acceleration of perforating tubularstring caused by detonating impact load, finds the influence of the length and wall thickness of perforating tubular string to working stresses. The result shows that:when the detonating impact load exerts the perforating tubular string with compressive and tensile axial force alternatively;the vibration displacement, velocity and acceleration of perfora-ting tubular string change periodically at same cycle;the closer to the perforating gun, the larger the amplitude of vi-bration velocity and acceleration;the closer to the packer the smaller the vibration displacement, the larger the work-ing equivalent stress of perforating tubular string;the longer or the thicker the perforating tubular string, the smaller the working equivalent stress and the higher the strength safety. Therefore, it uses the damping tube between packer and perforating gun as well as thick walled tubing to increase the strength safety of perforating tubular string.