The Influence of Drilling Parameters on the Particle Size and Return Efficiency of Rock Debris:Taking the Strong Abrasive Strata in the East Kunlun Metallogenic Belt as an Example
A feasibility analysis study was conducted on the problem of rock debris return during drilling in the highly abrasive strata of the East Kunlun metallogenic belt in Qinghai Province.The region is rich in mineral resources,but traditional methods of changing pump volume have limitations due to factors such as abrasive formations and complex wellbore conditions.The study analyzed the effects of factors such as diamond concentration,diamond particle size,drilling speed,and drilling pressure on the particle size of rock debris through micro drilling experiments.The aim is to achieve finer particle size of rock debris by adjusting drilling procedures,promote smooth upward movement of rock debris,and improve drill bit life and drilling efficiency.The experimental results indicate that an increase in diamond concentration and finer diamond particle size on the bottom lip surface leads to a decrease in rock debris particle size,while an increase in drilling pressure within a certain range leads to an increase in rock debris particle size.However,exceeding the critical value can result in a decrease in rock debris particle size and may affect the life of the drill bit.An increase in rotational speed will result in a finer particle size of rock debris.The study provides a theoretical basis for optimizing drilling parameters in highly abrasive formations,which is of great significance for improving drilling efficiency and reducing costs.
Return of rock debrisBottom lip surface of drill bitDrilling parametersDrilling speedDrilling pressure
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