Two-Layer Contact Nonlinear Mechanical Analysis of Flexible Drilling Tool in the Wellbore

作     者：Min Luo Tingting Xu Jiajun Jiang Xu Chi Jing Wang Shihua Xue 

作者机构：Mechanical Science and Engineering CollegeNortheast Petroleum UniversityDaqing163318China Toutai OilfieldDaqing Oil Field Co.Daqing163000China Natural Gas Branchthe Third Group of Oil and Gas ProcessingDaqing Oil Field Co.Daqing163453China Mathematics and Statistics CollegeNortheast Petroleum UniversityDaqing163318China 

出 版 物：《Computer Modeling in Engineering & Sciences》 (工程与科学中的计算机建模（英文）)

年 卷 期：2020年第123卷第4期

页      面：75-100页

核心收录：

学科分类：0820[工学-石油与天然气工程] 082001[工学-油气井工程] 08[工学] 

基　　金：support from the Natural Science Foundation of China(Grant numbers:51674088) supported by National Natural Science Foundation of China(Grant No.51674088) 

主　　题：Flexible drilling tool beam element universal joint contact nonlinear finite element. 

摘      要：The lack of research on flexible drilling tool leads to limited application of ultra-short radius horizontal *** flexible drilling tool is different from the conventional drilling *** flexible drilling pipe involves a mutual transition between the structure and the mechanism during the deformation *** the same time,the flexible drilling pipe and the eccentric guide tube,the guide tube and the wellbore generate random *** this paper,3-D beam elements,universal joint elements,rigid beam elements and the beam-beam contact elements are combined to establish a two-layer contact nonlinear finite element model of the flexible drilling tool in the *** dynamic relaxation method is introduced for numerical *** feasibility of the model and the algorithm is verified by an *** mechanical analysis of flexible drilling tool under the four hole inclinations in the oblique section is carried *** is found that the flexible drilling pipe has a“folded line*** contact force between the flexible drilling pipe and the guide tube is randomly *** contact force between the guide tube and the wellbore in the oblique section is greater than that in the vertical *** the hole inclinations increase,the torque and axial force transmitted to the drill bit gradually decrease.