Simulation and Experimental Research of PDC Bit Cutting Rock
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TECHNICAL ARTICLE—PEER-REVIEWED
Simulation and Experimental Research of PDC Bit Cutting Rock Yuchun Kuang . Mingming Zhang . Ming Feng . Yi Zhang . Yiwei Han . Yazhou Peng
Submitted: 29 July 2016 / Published online: 11 October 2016 Ó ASM International 2016
Abstract In order to achieve efficiently the optimal design and evaluation of PDC (polycrystalline diamond compact) bit, a finite element model for PDC bit cutting rock was established, forecasting the torque and the drilling pressure distribution trends of the cutting teeth on the bit. Through the PDC bit drilling rock, our experimental model validates the reasonableness and effectiveness of finite element simulation. It further demonstrates that the results of the changing trend of experiment and finite element simulation are very close and verify the accuracy and feasibility of the simulation model. The finite element model for single wing PDC cutting rock was established. This paper analyzes the distribution trends of the cutter torque and drilling pressure on bit under the conditions of the different penetration rates and rotational speeds. The ‘‘attack’’ of the cutting teeth is also analyzed. The results show that the torque of the cutting teeth is increased with the increasing penetration rate with the other conditions being the same. Under the same penetration rate and rotating speed, the drilling pressure of the cutting teeth tends to increase first with the increasing distance from the center axis of the drill bit, and then decrease. The cutting force of each tooth increases with the increasing penetration rate, and near the shoulder, it reaches the
Y. Kuang M. Zhang (&) Y. Zhang Y. Han School of Mechatronic Engineering, Southwest Petroleum University, Chengdu 610500, China e-mail: [email protected] M. Feng Sichuan Chuanqing Oil Drilling Technology Co. Ltd, Guanghan, Sichuan, China Y. Peng Sichuan Drilling & Production Technology Research Institute of SPA, Guanghan, Sichuan, China
maximum, even though the cutting force is less affected by the rotating speed. Keywords PDC bit Penetration rate The torque Drilling pressure Finite element
Introduction The drilling efficiency of PDC bit is mainly dependent on the cutting efficiency of the teeth breaking rock. The main factors affecting the PDC teeth include drilling parameters, cutting parameters, and rock properties [1–3]. Inappropriate drilling parameters will lead to the instability of the penetration rate and reduce the service life. In recent years, the research on the mechanical properties of PDC cutting teeth is mainly focused on the aspects of working parameters, structural parameters, drilling parameters, and rock properties. The characteristics of single tooth breaking rock are studied by experiment and numerical simulation, such as the influences of the anteversion angle, the roll angle, the shape of the rock, the mechanical drilling speed, and the rotating speed on the cutting force [4–9]. The characteristics of the full-sized bit are mainly studied by the indoor bench test and
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