PDC钻头在复杂运动条件下的切削量和工作区域分析

ANALYSIS FOR CUTTING AREA AND CUTTING VOLUME OF PDC BIT UNDER THE CONDITIONS OF COMPLEX MOVEMENT

介绍计算机数字仿真技术在复杂运动条件下PDC钻头切削量计算和工作区域分析中的应用。阐述由虚拟的钻头、井底和井壁构成的仿真系统的建模方法以及仿真流程的原理。由于仿真模型中允许钻头作横向运动和摆动,所以虚拟钻头的运动条件与PDC钻头实际的运动条件非常接近,可以通过参数的调整模拟钻头在井底的各种复杂运动。该仿真系统突破了传统的理论分析方法中对钻头运动条件的限制和对钻头切削结构方案的限制,分析结果的科学性和可信度显著提高。

The paper puts forward an approach to calculate cutting area and cutting volume of PDC bit under the conditions of complex movement by the application of digital computer simulation technology. And it also describes the module constructed way of simulation system that consists of virtual bit, well bottom and well wall and the principle of simulation flow. Owning to across movement and roll of bit in the simulation model, the movement of virtual bit is very similar to that of PDC bit under the actual conditions. What is more, the system can simulate all kinds of complex movement by adjusting the parameters. As the simulation system excludes the restriction of moving conditions and cutting structure of bit in the traditional theoretical analysis, the simulation result is more scientific and reliable.