摘要
空气锤钎头在钻井过程中表现的低疲劳寿命,大大降低钻井效率,提高了钻井成本。为此,研究空气锤钎头的疲劳寿命并对其结构优化,以提高空气锤钎头的服役寿命。在12.25 in(1 in=2.54 cm)空气锤钎头的基础上,考虑防掉结构,对空气锤钎头整体结构进行设计。提出微型钎头概念并完成了微型钎头样品疲劳寿命实验,使用Ansys/Ls-Dyna和nCode DesignLife软件对微型钎头进行动力学与疲劳寿命分析并与实验结果相验证,对钎头基本结构和材料进行确定。将仿真过程运用到钎头本体,考虑钎头本体尺寸和活塞冲击速度等问题对钎头疲劳寿命的影响,对钎头本体进行结构优化。研究表明,采用40CrMnSiMoV的钎头疲劳寿命最佳;钎头本体基本尺寸中,直径对钎头疲劳寿命影响最大;当冲击功变化时,钎头疲劳寿命随末速度的增加而减小;冲击功恒定情况下,当钎头末速度的平方与钎头质量接近时,钎头疲劳寿命最佳。
Due to the low fatigue life of the air hammer bit in the drilling process,the drilling efficiency is greatly reduced and the drilling cost is increased.Therefore,the fatigue life of the air hammer bit is studied and its structure is optimized to improve the service life of the air hammer bit.On the basis of the 12.25 in(1 in=2.54 cm)air hammer bit,the overall structure of the air hammer bit was designed considering the anti⁃drop structure.The concept of micro bit was proposed and the fatigue life experiment of micro bit samples was completed,using Ansys/Ls⁃Dyna and nCode DesignLife software,the dynamics and fatigue life of the micro drill bit are analyzed and verified with the experimental results,and the basic structure and material of the drill bit are determined.The simulation process is applied to the drill bit body,considering the size of the drill bit body and the impact velocity of the piston,etc.The influence of the problem on the fatigue life of the drill bit,the structure of the drill bit is optimized.The research shows that the drill bit with 40CrMnSiMoV has the best fatigue life.Among the basic dimensions of the drill bit body,the diameter has the greatest impact on the fatigue life of the drill bit.When the impact energy changes,the fatigue life of the drill bit decreases with the increase of the end speed.When the impact energy is constant,when the square of the end speed of the drill bit is close to the quality of the drill bit,the fatigue life of the drill bit is the best.
作者
冯春宇
杨双庆
范黎明
刘汉广
赖书斌
刘远日
FENG ChunYu;YANG ShuangQing;FAN LiMing;LIU HanGuang;LAI ShuBin;LIU YuanRi(School of Mechatronic Engineering,Southwest Petroleum University,Chengdu 610500,China;Research Institute of Drilling and Production Engineering Technology,CNPC Chuanqing Exploratory Drilling Engineering Co.,Ltd.,Deyang 618300,China;Petrochina Tarim Oilfield Company,Korla 841000,China;Nanhai Engineering Branch,CNOOC EnerTech Equipment Technology Co.,Ltd.,Zhanjiang 524057,China;Engineering Technology Branch,CNOOC Ener Tech-Drilling&Production Company,Tianjin 300452,China)
出处
《机械强度》
CAS
CSCD
北大核心
2024年第2期476-483,共8页
Journal of Mechanical Strength
关键词
空气锤钎头
结构优化
动力学
疲劳寿命
Air hammer bit
Structural optimization
Dynamics
Fatigue life
作者简介
冯春宇,男,1986年生,四川南充人,汉族,西南石油大学机电工程学院副教授,硕士,主要研究方向为天然气开采技术及设备。
