STRUCTURAL OPTIMIZATION AND FATIGUE LIFE STUDY OF AIR HAMMER BIT

FENG ChunYu; YANG ShuangQing; FAN LiMing; LIU HanGuang; LAI ShuBin; LIU YuanRi

doi:10.16579/j.issn.1001.9669.2024.02.029

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STRUCTURAL OPTIMIZATION AND FATIGUE LIFE STUDY OF AIR HAMMER BIT

更新时间：2024-07-05

- STRUCTURAL OPTIMIZATION AND FATIGUE LIFE STUDY OF AIR HAMMER BIT
- Journal of Mechanical Strength Vol. 46, Issue 2, Pages: 476-483(2024)
- 作者机构：
  
  1. 西南石油大学机电工程学院
  2. 中国石油集团川庆钻探工程有限公司钻采工程技术研究院
  3. 中国石油塔里木油田公司
  4. 中海油能源发展装备技术有限公司南海工程分公司
  5. 中海油能源发展股份有限公司工程技术分公司
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2024.02.029
  CLC： TE921
- Published：15 April 2024，
- 稿件说明：
移动端阅览
FENG ChunYu, YANG ShuangQing, FAN LiMing, et al. STRUCTURAL OPTIMIZATION AND FATIGUE LIFE STUDY OF AIR HAMMER BIT. [J]. Journal of Mechanical Strength , 2024,46(2):476-483.
DOI：

FENG ChunYu, YANG ShuangQing, FAN LiMing, et al. STRUCTURAL OPTIMIZATION AND FATIGUE LIFE STUDY OF AIR HAMMER BIT. [J]. Journal of Mechanical Strength , 2024,46(2):476-483. DOI： 10.16579/j.issn.1001.9669.2024.02.029.

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。

Abstract

Due to the low fatigue life of the air hammer bit in the drilling process

the drilling efficieney 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 miero 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 basie 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.

关键词

空气锤钎头结构优化动力学疲劳寿命

Keywords

Air hammer bitStructural optimizationDynamicsFatigue life

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