Analysis of Sonic Drilling Standard ASTM D6914/D6914M—16

Abstract:

The sonic drilling technology has the advantages of high speed, good core fidelity and wide application horizon. It is widely used in engineering survey, environmental investigation, shallow source geothermal, basic engineering, mine management and other fields. In order to improve the construction quality and process control of sonic drilling, the American Society for Materials and Experiments developed the first sonic drilling program D6914—04 in 2004. After many revisions and improvements, the latest sonic drilling program D6914/D6914M—16 was formed. According to the content of this edition, this paper expounds from the technical principle, drilling equipment, hole forming process and so on. When the vibrator overlaps the drill string resonance frequency, the energy received by the sonic drill bit peaks. Drilling rigs and core drilling tools are the core equipment for sonic drilling. The hole forming process is mainly based on double-tube high-frequency vibration and low-speed rotation, and realizes in-situ coring operation of various target layers. Standard related content has reference significance for the continuous promotion of sonic drilling technology in China.