The vibration of a drill string can cause multiple hazards in the process of drilling operations. The conversion of excessive vibration energy of the drill string into the rock breaking energy can provide the dual effect of reducing the risks and improving the rock breaking efficiency of drilling. To address the task, a drill string absorption & hydraulic supercharging device has been developed. However, the design and exploitation of the drill string absorption & hydraulic supercharging device needs a comprehensive understanding of the characteristics of conversion of the drill string’s vibration energy. Based on the drill string dynamics experimental device, a simulation test platform has been developed to evaluate the efficiency of conversion of the vibration energy. The analysis of the test results is used to evaluate the conversion characteristics of the vibration energy of the bottom hole drill string. The results show that the energy conversion efficiency depends on the elastic stiffness and installation position of the drill string absorption & hydraulic supercharging device, the overall rotational speed, and the WOB (weight on bit) of the conversion device. With increase in the elastic stiffness, the conversion efficiency of the vibration energy first increases and then decreases. The closer the installation position of the drill string absorption & hydraulic supercharging device is to the bit, the better the conversion efficiency. With increase in the rotational speed, the conversion efficiency of the vibration energy increases. With increase in the WOB, the conversion efficiency of the vibration energy first increases and then decreases. The research results provide the background for the development and application of speed raising tools based on conversion of the drill string vibration.

钻柱的振动会在钻井作业过程中造成多重危害。将钻柱的过度振动能量转化为破岩能量，可以起到降低风险和提高钻井破岩效率的双重作用。为解决这一任务，开发了一种钻柱吸收和液压增压装置。但是，钻柱吸振液压增压装置的设计和开发需要对钻柱振动能量的转换特性有一个全面的认识。以钻柱动力学实验装置为基础，研制了振动能量转换效率仿真试验平台。试验结果分析用于评价井底钻柱振动能量的转换特性。结果表明，能量转换效率取决于钻柱吸附与液压增压装置的弹性刚度和安装位置、总转速以及转换装置的钻压（WOB）。随着弹性刚度的增大，振动能量的转换效率先增大后减小。钻柱吸附及液压增压装置的安装位置越靠近钻头，转换效率越好。随着转速的增加，振动能量的转换效率增加。随着 WOB 的增加，振动能量的转换效率先升高后降低。研究成果为基于钻柱振动转换的提速工具的开发和应用提供了背景。