The drill bit is the main component of drilling equipment, and its main role is to break the rock and form the wellbore. The rotary drill bit is the drill bit commonly used in the petroleum industry at present, and the rotating drill bit will produce rotation under the drive of machinery, thereby driving the whole drill bit to produce centripetal motion, and crack and break the rock through erosion and grinding, and play the role of downward drilling. Drill bit is one of the main drilling equipment, according to the different working environment, regional environment, the specification and shape of the drill bit should also be different, in the oil drilling work, should be based on the specific needs, specific design scheme, reasonable and scientific selection of drill bit [3]. In the specific drilling work, the scientific selection of drill bits and the reasonable determination of drilling fluid, so as to improve the work efficiency and quality of oil drilling, can make oil drilling better play its own value, and make certain contributions to the development of the petroleum industry.
