摘要
冲旋钻井技术在石油钻井过程中应用广泛,如何提高钻井效率是关键问题。钻井效率与能量传递效率有直接关系,而决定冲击机械能量传递效率的因素中理想入射波形起决定性作用。针对如何使能量传递效率最大化的问题,即如何获得理想入射波形问题,分析了冲击旋转钻井破岩过程,将冲击器冲击系统简化为一维模型,用线性分段函数图像简化钻头与岩石的相互作用;基于冲击系统力学模型建立钻头与岩石相互作用的控制方程,引入无量纲参数β,推导出了使破岩效率最大化的理想入射波形表达式;详细对比分析了不同增长率下应力波形的破岩效率,得出了能量传递效率与理想入射波形的对应关系,根据所得理想入射波形为冲击钻具设计和现场作业提供了理论依据。
Rotary-percussive rock drillingtechnology is widely used in oil drilling process,how to improve the drilling efficiency is an important problem needs to be considered. The drilling efficiency is related to the energy transfer efficiency,and theideal incident wave plays a decisive role in the energy transfer efficiency of impact machine. In order to solve the question how to maximize the energy transfer efficiency,and how toobtain ideal incident wave,analyzesthe process of rotarypercussive rock drilling,A 1D model is used for the percussive system,and the bit-rock interaction is represented by a piecewise linear function image.Control equations of bit-rock interaction based on the 1D model is established,dimensionless parameters β is introduced,and functional expressing the dependence of the efficiency on the incident wave is derived and maximized; compared the efficiency of different wave shape with different？growth rate,and the relationship between ideal incident wave and energy transfer efficiency is obtained,providingtheoretical basis for percussion drilling tools and field operation according to the shape of ideal incident wave.
出处
《机械设计与制造》
北大核心
2016年第1期43-46,共4页
Machinery Design & Manufacture
基金
国家自然科学基金项目(11462021)
关键词
冲击旋转钻井
理想入射波形
能量传递效率
波动力学
Rotary-Percussive Rock Drilling
Ideal Incident Wave
Energy Transfer Efficiency
Wave Mechanics
