LONG-LIFE DRILL BIT WITH DOWNHOLE SELF-RENEWAL CAPABILITY

原文（中国語）

A long-life drill bit with a downhole self-renewal capability is provided. The long-life drill bit with a downhole self-renewal capability includes a drill bit body and a joint. A fixed blade and a support blade are arranged on the drill bit body. Main cutting teeth are embedded in the fixed blade. Central flow channels are arranged inside the drill bit body and the joint. A self-renewal wheel is arranged on the support blade, and the self-renewal wheel is rotatably connected with the support blade through a wheel shaft. A ratchet shaft, a transmission shaft, a spring, a sliding pin and the like are arranged inside the drill bit body, and the self-renewal wheel can realize a driving rotation action through transmission of the ratchet shaft. Self-renewal teeth are also arranged on the self-renewal wheel.