The rotary system is a typical system of rotary table drilling rig. Its function is to drive the drilling tool to rotate to break the rock layer. The rotary system includes rotary table, faucet and drilling tool. According to the different wells drilled, the composition of drilling tools is different, generally including Kelly, drill pipe, drill collar and drill bit. In addition, there are centralizers, shock absorbers and mating joints. Among them, the drill is a tool for directly breaking rocks, including scraper bit, roller bit, diamond bit and so on. The weight and wall thickness of the drill collar are very large. It is used to apply WOB to the drill bit. The drill pipe connects the surface equipment with the downhole equipment and transmits torque. The cross section of the Kelly is generally square. The rotary table drives the whole drill string and drill bit to rotate through the Kelly. The faucet is a typical part of the rotary drilling rig. It not only bears the weight of the drilling tool, but also realizes the rotary movement, and also provides a channel for high-pressure mud.