Finite Element Analysis Of The Machine-locked Drilling Rod Of Rotary Drill

Rotary drilling rig is a holing works equipment,which cooperating with different drilling tools. With more and more high,big construction projects appear, the traditional construction method and construction equipment has been unable to meet the requirements of current building construction. Based on this background condition, rotary drilling rig has been considerable development.Drill pipe in the construction process usually have to bear by the high torque, large drill press, and the slender structures prone to instability and other troubles. All this makes the drill pipe in the drilling process is complicated by the forces,greatly increased the risk of damage to the drill pipe. Based on the the painful lessons happened in the construction, Identify the weak links in the drill pipe structure, accurate analysis of the drill pipe failure and reasonable explanation become urgent importance.This study collection of rotary drilling rig drill pipe locking machine fault conditions first. Summary the typical machine lock failure from the drill pipe fault and analysis of reasons for the failure drill preliminary. Using three-dimensional drawing software Pro / E model of the drill pipe. According to the the drill pipe working characteristics, Using the software ANSYS analysis the static strength, modal analysis, fatigue analysis,of drill pipe,then compared the results. Base on the previous finite element fatigue analysis optimized the design of the drill pipe. Through optimizing the two variable parameters on the drill pipe, determined the optimal combination of data. Effectively extend the service life of drill pipe. Then trialed the drill, In Jiangxi, Guangxi, Heilongjiang test the drill harshly.The result is satisfactory.