Design of rock-breaking performance analysis platform for pilot hole-expanding drill bit based on Matlab/GUI
WU Zhi
LUO Yifei
MA Yachao
QIAO Dongyu
DAI Yong
ZHAO Jibin
SHANG Cangjian
ZHOU Haifeng
LIU Qianbin
Abstract：Currently,the development of software for polycrystalline diamond compact(PDC)bits is focused primarily on pilot bits,while no research on software for pilot-reamer bits has been reported.Moreover,the analysis of PDC bit rock-breaking performance is often conducted based on finite element simulation methods,which have limitations such as low efficiency,high time cost,and poor flexibility—greatly restricting the progress of bit design and development.To address this issue,a rock-breaking performance analysis platform for pilot-reamer bits based on Matlab/Graphical User Interface(GUI)was designed,aiming to provide an efficient tool for the evaluation and optimization of pilot-reamer bit rock-breaking performance.This platform utilized the numerical calculation capability of Matlab software and the image processing function of GUI.The zero-point traversal method was adopted,and combined with the cutting force model of cutting teeth,the platform could calculate the cutting parameters of cutting teeth and the force state of pilot-reamer bits.It could also quickly select the optimal drilling-reaming combination type based on environmental formation parameters,analyze the hydraulic characteristics of pilot-reamer bits,and thereby realize the rock-breaking performance analysis function.The results show that the software has strong adaptability and high efficiency.It can conduct batch analysis of the rock-breaking performance of pilot-reamer bits with different tooth arrangement structures in a short time,which provides important guiding significance for improving the design and development of pilot-reamer bits.
Keywords：Matlab/GUIPilot hole-expanding drill bitRock-breaking performanceTooth layout parametersZero-point traversal methodHydraulic analysis
Publication Date：2025-11-15
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：11( 68-78 )