In the article titled “Study on Dynamic Response of Downhole Tools under Perforation Impact Load” [1], Acknowledgments should be added as follows:

This paper has been supported in part by the National Basic Research Program of China (the 973 Program), 2015CB251205, and an independent innovation project of the CNOOC Research Institute “Study on Safety of Well Bore and String in Deepwater High Temperature and High Pressure Well” and PetroChina Innovation Foundation no. 2015D-5006-0309.