Abstract
The Hechuan region is located in the eastern part of the Sichuan Basin, with extremely complex crustal structures, including geological structures such as fault zones and fold zones. In the Hechuan area, the geological conditions are diverse and complex, including volcanic rocks, sedimentary rocks, metamorphic rocks, etc. The physical properties and strength of these formations vary, posing great challenges for drilling operations. In order to improve drilling efficiency, it is necessary to optimize the type of PDC bit. Firstly, the rock breaking principle of PDC drill bits was elaborated. Secondly, we optimize PDC drill bits based on their drillability, rock drillability, and compressive strength. Through the comprehensive analysis of the above three methods, the suitable types of PDC drill bits for the Hechuan area of the Sichuan Basin can be determined. According to the complexity of geological conditions and the different properties of rocks, PDC bits with strong adaptability, high wear resistance and impact resistance, strong cutting ability and guidance can be selected to improve drilling efficiency and reduce drilling costs.
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