Design method and system of spiral blade PDC drill bit cutting structure

• Main Authors: GAO MAOPING, CHEN SHUAI, LYU ZONGLIN, JIAO YE, WANG RONGRONG, SHI XIANGCHAO, WANG ZHAOWEI
• Format: Patent
• Language: Chinese; English
• Published: 16.07.2024
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS

The invention discloses a design method and system for a cutting structure of a spiral blade PDC drill bit, and the method comprises the following steps: carrying out a uniaxial and triaxial compressive strength experiment on an outcrop or an underground rock core, and obtaining rock mechanical parameters; a three-dimensional cutting structure of the PDC drill bit is established based on the Archimedes spiral and front and rear rows of teeth of the PDC drill bit; based on rock mechanical parameters and a PDC drill bit three-dimensional cutting structure, a drill bit-rock finite element model is established; based on the drill bit-rock finite element model, a bit pressure torque time travel curve is obtained; based on the bit pressure torque time history curve, a drill bit cutting structure design scheme is established; based on the drill bit cutting structure design scheme, the spiral blade drill bit cutting structure is obtained. According to the method, the spiral degree of the blade is quantitatively descr