The drill bit plays an important role in the water well drilling rig. During the drilling process, the operator should pay attention to the usage of the drill rig under the drill bit, so that the drill bit can be used for better production operations.

　　1. After the drill bit is drilled into the structure, the center drilling tool needs to be replaced in time. First, the bottom of the hole needs to be cleaned, and then the residue at the bottom of the hole is blown clean. After the drill bit stops rotating, the drilling tool in the water well drilling rig is slowed down. Lift it up slowly, it is most suitable when the lifting force is just enough to lift the drill.

　　2. During the drilling process of the drill bit, it is necessary to carefully observe the follow-up situation of the casing, understand the specific situation in the hole in time, and keep the hole clean in time when necessary.

　　3. Sometimes there will be a lot of residual slag at the bottom of the hole, and the rotating part of the eccentric bit will be stuck by the slag, which will affect its production. The down-the-hole hammer works for a short time, and then the lifting operation of the center drilling tool is repeated.