Status and development trend of vibration-impact ROP improvement technologies

After theoretical researches and field application on the rate of penetration (ROP) improvement for a long period, a variety of vibration-impact ROP improvement tools have been successfully developed in the industry and some achievements have been obtained. In this paper, axial vibration-impact ROP improvement technologies and torsional vibration-impact ROP improvement technologies were analyzed from the aspects of type, process principle and technological status, and the principle and status of axial-torsional combined vibration-impact ROP improvement technology was illustrated. Then, the development trend of vibration-impact drilling technologies was predicted based on their current situations. That is to strengthen the researches on the technologies to improve the ROP of long horizontal section and extend the downhole service life of vibration-impact ROP improvement tools to satisfy the technological demand of developing unconventional oil and gas resources. And according to the technological demand of oilfield development, strengthen the researches on downhole intelligent ROP improvement technologies to reduce oilfield development costs.