Research Status and Prospect of Downhole Acceleration Technology Based on Drill String Vibration

Abstract

Drilling acceleration technology has been a research hotspot in the field of drilling engineering. It is an important research direction in the field of ultra-deep well acceleration to find new energy available underground and develop a matching energy conversion method to improve rock-breaking efficiency. In this paper, the characteristics of downhole available energy are analyzed, and the concept of using vertical vibration energy of drill string to increase the speed of rock breaking assisted by jet pressure of downhole drilling fluid is expounded. This paper summarizes the structure and advantages of the developed downhole drilling string vibration reduction and pressurization device and multi-effect synergistic speed-increasing drilling device, and looks forward to the future development direction of deep-well speed-increasing equipment. The acquisition and rational utilization of downhole energy is an important research dirction for the development of speed-up tools in the future.