Finite element analysis on drilling string axial vibration in the crooked hole
Various kinds of drilling string vibration behaviors exist while deviated well (crooked hole) is drilling; the serious drilling string axial vibration will cause bit jumping,which is one of the most factors influencing deviated well drilling.Serious bit jumping phenomenon indicates that drilling string axial vibration shouldn’t be neglected.This research studies on the whole drilling string in the crooked hole as subjects,and analyzes the laws that the whole drilling string axial dynamic behavior followed under the condition periodic exciting force exists.Through the whole and the part drilling string finite element analysis,mass matrix,stiffness matrix and dynamic matrix equation are acquired.Using computer program,distribution laws of drilling string axial vibration frequency are acquired,which indicates bit jumping occurs when forced vibration frequency and natural frequency are closed to each other.This paper provides a theoretical basis of researching drilling string dynamic behavior in the crooked hole,and the obtained observation would be a further guidance for analyzing drilling string vibration on extended reach well drilling.
Deviated well Drill string Axial vibration Finite element
Jijun Li Tie Yan Xiaofeng Sun Shuqing Peng
Professor, Petroleum Engineering Faculty, Northeast Petroleum University; No.199, FaZhan Road, Daqin Professor, Faculty of Petroleum Engineering, Northeast Petroleum University; No.199, Fazhan Road, Hi Lecturer, Faculty of Petroleum Engineering, Northeast Petroleum University; No.199, FazhanRoad, High
国际会议
北京
英文
1328-1334
2012-10-14（万方平台首次上网日期，不代表论文的发表时间）