Study on downhole vibration drilling tool induced by hydropulse

To effectively improve the drilling speed in deep formation,based on thorough analysis of present technologies and combining present practice of drilling engineering,the superiority of integrating hydropulse drilling with impulse vibration drilling was presented,and the technical idea of developing downhole vibration drilling induced by hydropulse was brought forward.Meanwhile,related drilling tools were developed.The fundamental principle for the tools was to modulate hydropulse,then directly translated stress pulse into periodic impulse load on drilling bit by hydraulic energy transducer.In light of rock’s easy breaking under impulse load,the combination with hydropulse delivered downhole could contribute to better downhole rock stress state,intensify cutting clean-up,and improve the rock disintegration and drilling efficiency of drilling bit.Practical application manifests that the analysis of available technology is accurate,the presented technical idea is really feasible,the developed tools has correct philosophy and reliable structure,which totally offer an effective pathway for drilling efficiency improvement in deep formation.