This paper introduces some problems that should be paid attention to in the process of using drill bit of water well rig

Drill bit plays an important role in the drilling process of water well rig. The quality of drill bit directly affects the drilling efficiency and the quality of borehole formation. Therefore, we need to pay attention to bit selection and usage. During the drilling process, the operator should pay attention to the drilling use of the drill to make the drill more productive. Several aspects should be paid attention to in water well drill bit:
1. After drilling the drill bit into the structure, the center drilling tool needs to be replaced in time. The bottom of the hole needs to be cleaned first, and then the residue at the bottom of the hole needs to be blown clean. After the bit stops rotating, the drill tool in the well bit should be slowly lifted. It is most suitable when the lifting force is just enough to lift the drill.
2. During the drilling process, the drill bit of the well rig should be summarized. It is also necessary to carefully observe the subsequent casing conditions, learn the specific conditions in the hole, and keep the hole clean when necessary. In addition, the well drill bit shall not be pulled out forcefully during drilling.
3. Sometimes there will be a large amount of rock residue at the bottom of the well drill bit, and the rotating part of the eccentric drill bit will be blocked by rock residue, affecting its production. Compressed air was delivered, the hole was cleaned again, and the hammer was run for a short time before the central drill was lifted again.