Rock breaking simulation and optimization design of multi-ridged PDC cutters

被引：0
|
作者：
Wang X. [1 ]
Zhang H. [1 ]
Zhang K. [2 ,3 ]
Ouyang Y. [2 ,3 ]
Yu Y. [4 ]
Liu B. [4 ]
Liu K. [1 ]
Chen Y. [1 ]
机构：
[1] College of Petroleum Engineering, China University of Petroleum(Beijing), Beijing
[2] Oil and Gas Technology Research Institute, PetroChina Changqing Oilfield Branch, Xi'an
[3] State Engineering Laboratory of Low-Permeability Oil & Gas Field Exploration and Development, Xi'an
[4] Research Institute of Petroleum Engineering, SINOPEC Northwest Oilfield Company, Urumqi
来源：
Zhongguo Shiyou Daxue Xuebao (Ziran Kexue Ban)/Journal of China University of Petroleum (Edition of Natural Science) | 2022年 / 46卷 / 04期
关键词：
formation penetration ability; mechanical specific energy; multi-ridged PDC cutters; numerical simulation; ridge angle;
D O I：
10.3969/j.issn.1673-5005.2022.04.007
中图分类号：
学科分类号：
摘要：
In this paper, the numerical simulation of rock breaking by rotary cutting with fixed cutting depth was carried out for multi-ridged cutters with ridge height of 0-5 mm, ridge angle of 115°-172°. The influence of axial force was considered when calculating the mechanical specific energy(MSE) of the multi-ridged cutter. The geometric influence of the multi-ridged cutter on cutting force, formation penetration ability and the MSE was analyzed. The results indicate that the cutting force of the multi-ridged cutter decreases with the reduction of the ridge angle, but its penetrating ability improves. The axial force for the multi-ridged cutter with a ridge angle of 126° to penetrate the formation is 41% lower than that of a plane cutter. It is found that the optimal cutting depth is 2 mm. The axial MSE is 1. 2-1. 5 times larger than the tangential MSE, and a small change of the ridge angle has little effect on the MSE. The special geometry of the multi-ridged cutter can be prone to stress concentration and can induce a lateral force during rotation. The analysis of the forces on the inner and outer sides of the multi-ridged cutter shows the rock breaking efficiency is higher when the edge angle is above 151° and the cutting radius of the multi-ridged cutter is greater than 28 mm. © 2022 University of Petroleum, China. All rights reserved.
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页码：63 / 71
页数：8
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