Cutting energy characteristics for brittleness evaluation of rock using digital drilling method

Wang, Haoteng; He, Mingming; Zhao, Jianbin; Zhang, Yonghao; Yang, Bo

doi:10.1016/j.enggeo.2023.107099

Cited by 20 publications

(2 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Currently, drillability is commonly employed as a criterion for assessing drill bit selection 22 . It is generally believed that a drill bit exhibiting a higher rock-breaking efficiency is more adaptable than a drill bit exhibiting a lower rock-breaking efficiency, with little consideration given to the impact of drill bit wear on drilling efficiency.…”

Section: Evaluation Index Of Formation Abrasiveness Based On the Frac...mentioning

confidence: 99%

Prediction of formation abrasiveness under the action of a PDC bit based on the fractal dimension of a rock surface

Wang,

Li,

et al. 2024

Sci Rep

View full text Add to dashboard Cite

During rock drilling, a drill bit will wear as it breaks the rock. However, there is no uniform grading standard for rock abrasiveness. To solve this problem, the wear mechanisms of a polycrystalline diamond compact (PDC) bit and the formation it is drilling into are analyzed in depth, and an abrasiveness evaluation method based on the fractal dimension of the rock surface topography is established. Initially, a three-dimensional digital model is generated from a scanning electron microscope image of the rock after drilling; next, an evaluation of the irregularities on the rock surface is performed using an adapted Weierstrass–Mandelbrot (W-M) function to ascertain the fractal dimensionality. Then, the microcontact characteristics of the contact surface between the formation and the PDC bit are analyzed, and the distribution of the microconvex contact points of the two-body friction pair in a region is obtained. Because the sliding friction between the drill bit and the rock produces a large amount of heat, according to the contact area formula of the friction surface and heat conduction theory, the temperature rise and overall temperature distribution of the formation and PDC bit under the condition of sliding friction are revealed, and the real contact area between the formation and the drill bit within a certain temperature range is obtained. Finally, the evaluation index of rock abrasiveness under sliding conditions is established by adopting the wear weight loss of the rock cutting tool per unit volume as the index of rock abrasiveness, and the model is verified by a microdrilling experiment. The research in this paper is highly important for improving the rock-breaking efficiency and bit service life during drilling.

show abstract

Section: Evaluation Index Of Formation Abrasiveness Based On the Frac...mentioning

confidence: 99%

Prediction of formation abrasiveness under the action of a PDC bit based on the fractal dimension of a rock surface

Wang,

Li,

et al. 2024

Sci Rep

View full text Add to dashboard Cite

show abstract

“…The influence of temperature on the mechanical properties of rocks is significant and manifested through the variation of constitutive model parameters and strength with temperature [32][33][34][35][36][37]. The variations of the parameters of sandstone samples under the temperature conditions during coal seam gasification were obtained by conducting uniaxial and triaxial mechanical laboratory experiments.…”

Section: Temperature Dependency Of Rock Mechanical Parametersmentioning

confidence: 99%

Thermo-Mechanical Numerical Analysis of Stress and Damage Distribution within the Surrounding Rock of Underground Coal Gasification Panels

Wang,

Deng,

Liu

et al. 2023

Processes

View full text Add to dashboard Cite

Underground coal gasification (UCG) is a promising technology for extracting synthesis gas from coal seams through in situ gasification. This study aims to investigate the thermo-mechanical behavior and integrity of the surrounding rock in the gasification vicinity to facilitate safe and efficient UCG operations. Rock property testing experiments are conducted under varying temperature conditions, revealing significant temperature dependencies for the thermal and mechanical parameters. A thermo-mechanical coupling model is developed to analyze the stress and damage distribution near the gasification chamber. The influence of the temperature dependency of stress states and failure risks during the gasification process is evaluated. In addition, the effects of panel orientation, chamber width, maintaining duration, operating temperature and operating pressure on the failure behavior of the gasification surrounding rocks are illustrated through parametric analysis. The findings have practical implications for the design and assessment of UCG processes, enhancing the safety and efficiency of coal gasification operations.

show abstract

Effect of Water-Induced Rock Softening on Rock Anisotropy During Drilling Process

Ding,

2024

Rock Mech Rock Eng

View full text Add to dashboard Cite

Cutting energy characteristics for brittleness evaluation of rock using digital drilling method

Cited by 20 publications

References 54 publications

Prediction of formation abrasiveness under the action of a PDC bit based on the fractal dimension of a rock surface

Prediction of formation abrasiveness under the action of a PDC bit based on the fractal dimension of a rock surface

Thermo-Mechanical Numerical Analysis of Stress and Damage Distribution within the Surrounding Rock of Underground Coal Gasification Panels

Effect of Water-Induced Rock Softening on Rock Anisotropy During Drilling Process

Contact Info

Product

Resources

About