Holding pressure is an important factor affecting the rate of penetration (ROP) in horizontal wells. The holding pressure problem is directly and effectively solved by using the vibrating drag-reduction tools. In this paper, the finite element method is used to model the drilling process in a horizontal well with and without rotary percussion. The established model is based on a rotary percussion tool driven by PDM. Based on the simulation results, the authors compared and analyzed the impact of rotary percussion on the weight-on-bit (WOB), torque, acceleration and ROP in drilling process. The results show that the rotary percussion tool can effectively solve the problem of the holding pressure, increase the overall level and the fluctuation range of WOB, and improve ROP in the drilling process. It also increases the torque-on-bit and axial acceleration parameters. The analysis results can provide theoretical guidance for the parameter design and type selection of tools under different working conditions.

保压是影响水平井钻速（ROP）的重要因素。使用振动减阻工具直接有效地解决了保压问题。在本文中，有限元方法用于模拟水平井在有和没有旋转冲击的情况下的钻井过程。所建立的模型是基于由 PDM 驱动的旋转冲击工具。在仿真结果的基础上，作者比较分析了旋转冲击对钻井过程中钻压（WOB）、扭矩、加速度和机械钻速的影响。结果表明，旋转冲击工具能有效解决保压问题，提高钻压的整体水平和波动幅度，提高钻井过程中的机械钻速。它还增加了钻头扭矩和轴向加速度参数。分析结果可为不同工况下工具的参数设计和选型提供理论指导。