Numerical Simulation of Horizontal Directional Drilling for Rock Breaking and Analysis of Mechanical Properties

Abstract:

Horizontal directional drilling technology has broad application prospects in urban underground space development, resource exploration, and other fields. However, its rock breaking process is complex, making the study of the dynamic characteristics and parameter response patterns of horizontal directional drilling processes crucial. This paper focuses on PDC bits and roller cone bits, establishing a three-dimensional finite element simulation model of horizontal directional drilling formations based on ABAQUS. The model simulates the deformation, failure of rock mass, and the forces acting on the bit during drilling, obtaining response curves for bit reaction forces and torques, and analyzing the dynamic differences in rock breaking characteristics between the two types of bits. Through parametric simulation, the study investigates the influence patterns of different drilling parameters and rock mechanics parameters on the bit"s rock breaking dynamics. A multivariate parameter regression prediction model for bit reaction forces and torques is developed using response surface analysis, deriving drilling speed prediction equations for both types of bits. The accuracy of these equations is verified, providing a theoretical basis for optimizing drilling parameters and improving drilling efficiency.