中国石油大学学报（自然科学版）2024，Vol.48Issue(3)：75-83,9.DOI:10.3969/j.issn.1673-5005.2024.03.008
钛合金/钢钻杆复合钻柱动力学特性分析与优化设计
Dynamic characteristics analysis and optimization design of drill string composed of titanium/steel drill pipes
摘要
Abstract
Continuous increase of drilling depth makes the load condition of drill string more and more severe.Titanium alloy has the characteristics of small density,high yield strength and low elastic modulus.In this study,according to the design requirements of tensile allowance for wellhead drill pipes,three types of composed drill strings with titanium/steel drill pipes were designed,namely composite drill string 1(use titanium drill pipes throughout the entire Φ101.6 mm drill pipe sec-tion),composite drill string 2(use titanium drill pipes on the upper part of the Φ101.6 mm drill pipe section)and compos-ite drill string 3(use titanium drill pipes on the lower part of the Φ101.6 mm drill pipe section).In order to explore the dy-namic characteristics of the composite drill strings,a dynamic model of the composite drill string based on the Hamiton prin-ciple was proposed,using the node iterative method and Newmark-β method to solve the model.The whirl characteristics,dynamic stress and vibration characteristics of the three composite drill strings were analyzed,and compared with convention-al steel drill string.The results show that the use of the titanium alloy drill pipe can effectively slow down the whirl velocity and dynamic stress of the drill string,among which the whirl velocity and dynamic stress of composite drill string 3 are the smallest.Based on the vibration characteristic strength,the drilling operation parameters can be optimized,and a recommended drilling operation parameters chart of composite drill string 3 was formed,and a reasonable range of operation parameters was given.关键词
钛合金钻杆/复合钻柱/超深井/动力学特性/钻井参数Key words
titanium drill pipe/composite drill string/ultra-deep well/dynamic characteristics/drilling operation parameters分类
能源科技引用本文复制引用
陈锋,宾国成,刘志虎,张建军,郭文婷,吴永清,王文昌,刘强,狄勤丰..钛合金/钢钻杆复合钻柱动力学特性分析与优化设计[J].中国石油大学学报（自然科学版）,2024,48(3):75-83,9.基金项目
国家重点研发计划(2021YFB3700804) （2021YFB3700804）
国家自然科学基金项目(52374008,52174003) （52374008,52174003）
中国石油科学研究与技术开发项目(2021DJ2703) （2021DJ2703）
陕西省自然科学基金项目(2021JM-607) （2021JM-607）
