钻杆几何缩比相似性及结构完整性分析  

Analysis of the Geometric Scaling Comparability and the Structure Integrity of the Drill Pipe

作　　者：于增辉[1] 廖胜军[1] 侯洪为[1] 王蕙 国朝健 刘耀伟[1] 万琦 郭宇 YU Zenghui;LIAO Shengjun;HOU Hongwei;WANG Hui;GUO Zhaojian;LIU Yaowei;WAN Qi;GUO Yu(China Oilfield Services Limited,Sanhe 065201,China;College of Aerospace Science and Engineering,National University of Defense Technology,Changsha 410073,China)

机构地区：[1]中海油田服务股份有限公司,河北三河065201 [2]国防科技大学空天科学学院,湖南长沙410073

出　　处：《土木工程与管理学报》2023年第2期51-56,共6页Journal of Civil Engineering and Management

基　　金：中国科学院战略性先导科技专项(A类)课题(XDA14020200)。

摘　　要：石油钻杆结构复杂,工作环境严酷,在钻井作业中可能发生刚度、强度或断裂失效等结构完整性方面的问题,同时还可能出现与外激励耦合产生强烈共振等问题。为了便于发现石油钻杆振动引起的损伤或失效问题,本文首先在等强度假定下理论上研究了钻杆载荷与形变的几何缩比相似性,随后通过数值仿真方法探究几何缩比对钻杆结构完整性的影响并进行了实验验证。仿真结果表明,不同缩放比的钻杆在最大钻压、最大扭转以及复合载荷下其结构完整性均在安全范围内,同时验证了相似性理论。试验结果表明,缩小为原件1/4的钻杆试验件实测应力值与仿真值相对误差不超过12%,验证了仿真的准确性。综上可得,数值仿真结合样机试验的方法可为石油钻杆结构完整性评估提供技术支撑。Complex structure and harsh working environment of oil drill pipe,which lead to structural integrity problem such as stiffness,strength or fracture failure during drilling operations,as well as severe resonance caused by external excitation.To detect the damage and failure of drill pipe caused by vibration,the scaled model similarity of load and deformation were investigated theoretically under the equal-intensity assumption.Then the influence of model scaling ratio on the structural integrity of drill pipe was investigated by numerical simulation and experimental verification.The simulation results show that the structural integrity of the drill pipe with different scaling ratios is within the security scope under maximum bit pressure,maximum torsion and compound load,and the similarity theory is verified.Besides,the relative error between the experimental and simulated stress with 1/4 skrinkage ratio of the original size is less than 12%,which verifies the accuracy of simulation.The combination of numerical simulation and experiment can provide technical guidance for structural integrity evaluation of oil drill pipe.

关 键 词：钻杆 振动 相似性 几何缩比 结构完整性 

分 类 号：TE921[石油与天然气工程—石油机械设备]