Coupled fluid-structure simulation of a vibration-assisted rotary percussion drilling tool

ABSTRACT

Percussion drilling is considered to be an efficient method to promote the rate of penetration among the numerous tools. Therefore, a vibration assisted rotary percussion drilling tool is presented in this paper, which is driven through the motion of drill string. Three simplified models of designed structures are compared in this paper to define which one is to the most appropriate. Results indicated the structure of model 3 presented the best performance, and that the static and amplitude of the load is dependent on the flow rate and outlet size, the amplitude of dynamic load increased by increasing of the frequency and the displacement.

KEYWORDS:

• Percussive drilling
• load type
• fluid- solid interaction
• drill string vibration
• vibration assisted

Nomenclature

ROP	=	rate of penetration
WOB	=	weight on bit
FSI	=	fluid–solid interaction
CFD	=	computed fluid dynamic
N–S	=	Navier–Stoke

Acknowledgments

Thanks to all co-authors for their help in preparation for this paper. We declare that we do not have any commercial or associative interest that represents a conflict of interest in connection with the work submitted.

Additional information

Funding

This research were funded by the National Natural Science Foundation of China [Grant No. 51274235]; Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development [Grant No. 18-ZC0607-0023].