Optimized design of new composite drill

Abstract

In drilling engineering, the timeliness of the drill bit is very important, which affects the drilling speed and drilling cost. This paper starts from the rock breaking mechanism of the drill bit and the feedback of on-site construction, and analyzes the relative position of the composite drill bit PDC blade-roller For the impact of mechanical drilling speed and load distribution, a new type of composite drill bit was optimized and designed to form a two-level cutting composite drill bit. The new composite drill is designed for two-stage cutting mode. The stepped wellbore after two-stage cutting produces an equivalent steering angle, which can effectively reduce local head loss. The new composite drill bit can increase the mechanical drilling speed, reduce the cost of oil and gas extraction, and adapt to the future drilling dynamic needs.