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Logging Wireline Formation Tester PACKER Rubber Surface Finite Element Analysis and Optimization

Author: JieGuangJuan
Tutor: HuangJianLong
School: Lanzhou University of Technology
Course: Mechanical Manufacturing and Automation
Keywords: Double PACKER short section Rubber block Nonlinear finite element Rubber Surfaces ANSYS optimization
CLC: P631.83
Type: Master's thesis
Year: 2009
Downloads: 79
Quote: 0
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Abstract


Petrochemical huge pillar of the national economy , the oil exploration and development is a top priority of today 's oil industry , while the petroleum logging their instrument is to safeguard the smooth progress of the premise of Petroleum Exploration and Development . In this paper, a short section of the key modules of the wireline formation logging tools - double PACKER study of the following aspects : 1 . Analysis of the rubber material is different from the characteristics of the linear isotropic material , based on the experimental data collected to determine the stress-strain basic characteristics of the relationship , seeking the sealing characteristics of the rubber materials and rubber material , the use of rubber hyperelastic and incompressible , using the finite element method to study the rubber material - hybrid finite element method to solving the PACKER rubber surfaces borehole wall contact rubber overall vector displacement μ Kirchhoff stress vector t and hydrostatic pressure h parameters . Mooney-Rivlin model parameters obtained rubber rubber hardness and finite element method . According to the principle of double PACKER short section work , analysis and the establishment of the mechanical model experimental device designed to support experimental and sealed , and the experimental data analysis . Support experiments to determine the degree of the borehole wall of different sizes with different specifications rubber block with support . The results prove that the rubber block at a system pressure of 24MPa , fully supporting the entire instrument . Sealing experimental studies applies the optimum range of the different specifications rubber block , and the obtained the PACKER rubber size of the difference of size and borehole diameter range of between -1.625 ~ 3.0mm , the blending effect is best. According to the particularity of the rubber material , with the ANSYS finite element software to study the complex issue of the rubber material nonlinear , large strain and nonlinear contact ; rubber block and casing the borehole wall in 6 sizes the best fit under the contact pressure and the rubber stress , drawn semi - ○ -ring radius and position of the rubber block is to affect the sealing degree of the key factors . Using ANSYS software optimization module to optimize the six kinds of rubber block , half ○ -ring radius value and the best location . By optimization, improved Dimensions of the rubber block design, and to give the best sealing effect in the size of the optimization .

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