Analysis of drilling efficiency of shock hollow screw coring tool

HAN Zelong; SONG Gang; CHEN Xiaojun; LI Xiaoyang; NIU Qinglei and SHAO Yutao; ${author.authorNameEn}

doi:10.12143/j.ztgc.2023.03.007

2023 Vol. 50, No. 3

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HAN Zelong, SONG Gang, CHEN Xiaojun, LI Xiaoyang, NIU Qinglei and SHAO Yutao, . 2023. Analysis of drilling efficiency of shock hollow screw coring tool. DRILLING ENGINEERING, 50(3): 54-59. doi: 10.12143/j.ztgc.2023.03.007

Citation:

HAN Zelong, SONG Gang, CHEN Xiaojun, LI Xiaoyang, NIU Qinglei and SHAO Yutao, . 2023. Analysis of drilling efficiency of shock hollow screw coring tool. DRILLING ENGINEERING, 50(3): 54-59. doi: 10.12143/j.ztgc.2023.03.007

Analysis of drilling efficiency of shock hollow screw coring tool

Institute of Exploration Techniques, CAGS, Langfang Hebei 065000, China

Received Date: 18 January 2023

Revised Date: 03 March 2023

Abstract

Abstract

This paper aims at the problems of low drilling efficiency， low core recovery， large disturbance and high accident rate during the coring process of deep-sea hard rock， discusses the fracture mechanism of deep-sea hard rock under the combined conditions of rotary and impact taking the deep-sea hard rock as the research object and using the finite element numerical analysis software. The results show that the rotary rock breaking method can effectively improve the drilling efficiency. In the drilling process，15~25kN WOB and 4~6 mm boss height can be optimized. Under this condition， the ROP is faster， the core quality is higher， and the energy utilization rate is also higher. The closer the working frequency is to the optimal frequency ，the more efficient the drilling will be as long as the strength of the jarring component allows.
- deep-sea hard rock coring /
- shock-type screw /
- drilling efficiency /
- impact force /
- impact frequency

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References

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