Rock-breaking characteristics and impact resistance mechanism of ridged PDC cutters

IF 0.6 4区工程技术 Q4 ENERGY & FUELS

International Journal of Oil, Gas and Coal Technology Pub Date : 2023-01-01 DOI:10.1504/ijogct.2023.133811

Zhijie Chen, Yang Li, Qi Peng, Weiqiang Xu, Shiwei Niu, Haitao Ren, Yingxin Yang

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引用次数: 0

Abstract

In recent years, the high impact resistance of ridged PDC cutters has made them widely used in hard heterogeneous formations. However, theoretical studies on the impact resistance of ridged PDC cutters are still lacking. In this paper, we conduct linear cutting tests and found that the cutting surface of ridged PDC cutter can prevent the accumulation and compaction of rock debris, which significantly reduces the cutting force and mechanical specific energy (MSE), thereby increasing cutting efficiency. Then, when we analysed the vibration amplitude, frequency and rate of change of the load in the simulation, we found that the rate of change of the cutting load approximate Weibull distribution. Moreover, the load vibration amplitude and load rate of change of the ridged PDC cutter are smaller than those of the planar PDC cutter, which weakens the impact effect during the cutting process. The research results of this article can help us evaluate the impact degree of PDC cutters with different shapes when cutting rocks under different conditions. To provide assistance in optimising the shape and working parameters of PDC cutters in the future, in order to reduce impact and extend the cutting life of PDC cutters. [Received: September 8, 2022; Accepted: June 4, 2023]

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脊状PDC切削齿破岩特性及抗冲击机理

近年来，脊状PDC切削齿的高抗冲击性使其在硬质非均质地层中得到了广泛的应用。然而，关于脊状PDC切削齿抗冲击性能的理论研究仍然缺乏。在本文中，我们进行了直线切削试验，发现脊状PDC刀具的切削面可以防止岩屑的堆积和压实，从而显著降低切削力和机械比能(MSE)，从而提高切削效率。然后，对仿真中载荷的振动幅值、频率和变化率进行分析，发现切削载荷的变化率近似威布尔分布。脊状PDC齿的载荷振动幅值和载荷变化率均小于平面PDC齿，减弱了切削过程中的冲击效应。本文的研究结果可以帮助我们评价不同形状的PDC切削齿在不同条件下切削岩石时的冲击程度。为今后优化PDC切削齿的形状和工作参数提供帮助，以减少冲击，延长PDC切削齿的切削寿命。[收稿日期:2022年9月8日;录用日期:2023年6月4日]

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Oil, Gas and Coal Technology ENERGY & FUELS-ENGINEERING, CHEMICAL

CiteScore

1.30

自引率

0.00%

发文量

审稿时长

2.9 months

期刊介绍： IJOGCT is a multidisciplinary refereed journal that is concerned with exploration, production, processing and refining, storage and transportation, economical, managerial, business, environmental, safety and security issues related to oil, natural gas, coal and petrochemicals as well as manufacturing and refining of biofuels. Topics covered include Exploration, geological studies, reserves estimation Production/recovery methods, drilling technology, subsea engineering Production rates, forecasting future demand Heavy oil, oil sand/shale recovery/processing, oil/gas field processing Petroleum refining, coal liquid/hydrogen production, petrochemical industry Ultra low sulphur fuels, LNG, CNG and LPG, natural gas processing Gasoline from natural gas/coal liquid, biorefining, biofuels Nano/biotechnology, computerisation/automation, modelling/simulation Refinery process optimisation, management of refining industry, major oil companies Fuel quality/specifications, storage, transportation Environmental issues, carbon management, sequestration, storage Oil spill occurrence, monitoring, clean up methods, contingency plans Fuel prices, future market fluctuations, forecasting, safety/security Business/international trade regulations, political/governmental/economic issues Biofuels vs fossil fuels; future technology, business.