Modeling and experimental research on temperature field of full-sized PDC bits in rock drilling and coring

Factors affecting drilling incidents: Prediction of suck pipe by XGBoost model

“…This is a proven technology due to its applicability and efficiency. Studies have shown that the material and temperature have a significant impact on the drill pipe and bits to operate in a severe environment [12,13]. If the attempts to release the stuck pipe are unsuccessful, the last effort is to rescue the tool used to release the drill string into the well.…”

Influence mechanism of polycrystalline diamond compact bit temperature rise based on thermo-fluid–solid coupling

“…Li et al 18 established a temperature field model and a thermal stress calculation model for water jet-assisted rock drilling in combination with the boundary conditions such as heat flow density and interface temperature, and concluded that thermal stress was the main reason for tool failure and that thermal stress was related to parameters such as tool and rock material properties, geometric dimensions, cutting parameters and jet pressure. Gao et al 19 established a temperature calculation model in order to study the influence of parameters and rock type on the temperature of the bit in drilling. The temperature of PDC cutting teeth under different parameter combinations was qualitatively analyzed with temperature tests, the experimental results were obtained to be in good agreement with the simulation results, in which the drilling speed would increase the temperature of cutting teeth.…”

“… 6 Zhou et al 7 considered the wear process of circular tools and derived a simple model for the relationship between depth of cut and mechanical specific energy, and found that the wear of cutting teeth usually leads to lower efficiency, increased mechanical specific energy, or lower drilling speed. Li et al 8 used ABAQUS software to establish a numerical model of single tooth-rock interaction of PDC bit, the cohesive force and compressive stress of rock material are alternately distributed in the damage area, and the highest rock breaking efficiency is obtained when the impact conditions are the same and the axial impact frequency is 1/2 of the torsional impact frequency; if the impact frequency is too small, the rock cannot be broken effectively and the drilling process will occur viscous slip vibration.…”