基于UG的PDC钻头钻进仿真方法研究

发布时间：2018-06-24 05:38

本文选题：PDC钻头 + 计算机仿真　；参考：《西南石油大学》2015年硕士论文

【摘要】：采用仿真方法进行PDC钻头切削参数的模拟计算是钻头个性化设计的重要技术手段。为提高PDC钻头钻进仿真的效率及精度、可视化效果以及与钻头三维设计系统实现无缝连接,本论文利用UG二次开发技术开展了PDC钻头钻进仿真方法的研究。本文在PDC钻头几何学、运动学及互作用力学理论的基础上,利用UG软件的参数化建模及扫掠功能建立虚拟钻头模型和切削齿的切削轨迹模型；将原有仿真方法中建模难度较大的PDC虚拟切削仿真以及切削参数的计算等模型,利用UG的布尔运算功能实现；建立了基于UG二次开发功能开发的PDC钻头钻进仿真系统软件。针对特殊工艺井钻井工况仿真需求,根据复合钻井中PDC钻头复合运动和导向运动特性,在理想工况PDC钻头钻进仿真方法的基础上改变运动学模型,利用微元法建立了切削齿切削轨迹模型；拓展了UG建模中相交线的计算功能,解决了复杂运动工况下切削参数的计算难题。针对复杂地层情况下PDC钻头钻进硬夹层工况,在复杂运动工况PDC钻头钻进仿真方法的基础上开发了穿越夹层钻进仿真模型,可以仿真分析在软硬交错地层中钻进下部地层时,各切削齿切削上下部地层的切削量和切削力变化关系。本论文运用模块化设计方法,将PDC钻头钻进仿真系统软件分为：输入模块、仿真模块、分析模块、输出模块。可以根据用户需求选择模块组合,去除不必要模块的运行时间,提高效率和软件使用的灵活性。研究结果表明,本文的切削量参数仿真结果与既有数值仿真方法计算结果变化趋势相同,并且具有更高精度。对比切削力仿真结果与有限元仿真方法仿真结果表明,两种模拟方法的切削力变化趋势相同,但本论文建立的仿真软件仿真效率更高。本文的研究结果为PDC钻头钻进仿真提供了一种新的方法,有助于提高个性化PDC钻头产品的开发效率。
[Abstract]:The simulation method of PDC bit cutting parameters is an important technical means of bit individualized design. In order to improve the efficiency and precision of PDC bit drilling simulation, the visualization effect and the seamless connection with the 3D design system of PDC bit, this paper makes use of UG secondary development technology to develop the simulation method of PDC bit drilling. Based on the theory of PDC bit geometry, kinematics and interaction force, the virtual bit model and the cutting path model of cutting teeth are established by the parameterized modeling and sweep function of UG software. The PDC virtual cutting simulation and cutting parameter calculation model, which is difficult to model in the original simulation method, is realized by the Boolean operation function of UG, and the software of PDC bit drilling simulation system based on the secondary development function of UG is established. According to the requirements of drilling simulation of special process wells, according to the characteristics of PDC bit's compound motion and steering motion in compound drilling, the kinematics model of PDC bit is changed on the basis of the simulation method of PDC bit drilling under ideal conditions. The cutting path model of cutting teeth is established by using the micro-element method, and the calculation function of intersection line in UG modeling is extended, and the difficult problem of calculating cutting parameters under complex moving conditions is solved. In view of the hard interlayer drilling condition of PDC bit in complex formation, the simulation model of drilling through interlayer is developed on the basis of the simulation method of PDC bit drilling under complex moving condition, which can be simulated and analyzed when drilling into the lower stratum in soft and hard interlaced formation. The relationship between cutting quantity and cutting force of the upper and lower strata of each cutting tooth. In this paper, the software of PDC bit drilling simulation system is divided into input module, simulation module, analysis module and output module by means of modular design method. The combination of modules can be selected according to the needs of users to remove the running time of unnecessary modules and to improve the efficiency and flexibility of software use. The results show that the simulation results of cutting parameters in this paper are the same as those calculated by the existing numerical simulation method and have higher accuracy. By comparing the cutting force simulation results with the finite element simulation results, it is shown that the two simulation methods have the same trend of cutting force change, but the simulation software established in this paper is more efficient. The results of this paper provide a new method for drilling simulation of PDC bit and help to improve the development efficiency of personalized PDC bit products.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE921.1

【参考文献】