Results 251 to 260 of about 143,227 (288)

Study on rock-breaking mechanism of axe-shaped PDC cutter

Journal of Petroleum Science and Engineering, 2021
Abstract Polycrystalline diamond compact (PDC) cutter is the key component of a drill bit. Recently the shaped PDC cutters, especially the axe-shaped cutter (ASC), have been warmly welcomed by the drilling engineers. However, the rock-breaking mechanism of ASC is rarely studied.
Fangyuan Shao, Wei Liu, Deli Gao, Yuchen Ye   +3 more
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The three-dimension model for the rock-breaking mechanism of disc cutter and analysis of rock-breaking forces

Acta Mechanica Sinica, 2012
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Zhang, Zhao-Huang, Sun, Fei
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A mechanism for directional breaking of rocks by blasting

Soviet Mining Science, 1985
As is well known, the occurrence of local failure in uniform brittle materials, in particular in hard rocks, is caused by a factor such as stress concentration in areas of ensuing failure. A classification was given in [1] of directional breaking of rocks by blasting which revealed two principal variants for creating stress concentration leading to ...
A. L. Isakov, G. V. Basheev
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New Method for Studying Rock-Breaking Mechanism by Disc Cutters

Transactions of Tianjin University, 2017
Gaining a thorough understanding of the theoretical principles of rock breaking with a disc cutter is a critical issue in tunnel boring machine (TBM) technology. To fully consider the complexity and importance of the basic principles of rock breaking during tunnel excavation, in this paper we use a new method, the smooth particle hydrodynamics (SPH ...
Jianqin Liu, Huaicheng Bin, Wei Guo, Mengmeng Liu, Xuanbin Jia   +4 more
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Numerical Study on Rock-Breaking Mechanisms of Triangular-Shaped PDC Cutter

57th U.S. Rock Mechanics/Geomechanics Symposium, 2023
ABSTRACT Conventional PDC cutter usually gets broken when drilling into deep formations due to high hardness and strong abrasion. To help solve such a problem, triangular-shaped PDC cutters have been developed and utilized in the design of hybrid-cutters PDC bit, which have achieved enhanced rate of penetration and ...
He Wenhao, Li Xue, Zhang Runqing, Chen Zhenliang, Shi Huaizhong, Huang Zhongwei, Xiong Chao, Sun Jinming, Hu Chengtao   +8 more
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Working mechanism and rock-breaking characteristics of coring drill bit

Journal of Petroleum Science and Engineering, 2018
Abstract For improving the rate of penetration of the complex well structure and performance of the coring drill bit, this paper is to investigate a new type of coring drill bit that generates small-diameter core samples during the drilling process.
Jialin Tian, Jurui Li, Wenming Cheng, Zhi Zhu, Lin Yang, Yi Yang, Tangjia Zhang   +6 more
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Mechanical model of breaking rock and force characteristic of disc cutter

Journal of Central South University, 2012
According to the cutting characteristics of progressive spiral movement by rotary cutting of the disc cutter, using the broken theory of interaction of compression and shearing, the three-axis force rotary cutting mechanical model of disc cutter was established and the influence of installation radius, the phase difference and the cutter space on the ...
Yi-min Xia, Tao Ouyang, Xin-ming Zhang, De-zhi Luo   +3 more
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Improved Calculation Model of Mechanical Specific Energy Based on Single-Cutter Rock-Breaking Mechanism

SPE Journal
Summary As oil and gas exploration progresses to ultradeep and 10 000-m depths, insufficient energy supply during rock breaking by downhole polycrystalline diamond compact (PDC) bits presents a critical challenge. Quantifying the energy consumed in PDC cutter/rock interactions is therefore essential for enhancing bit efficiency and ...
Jiusen Wei, Guangqing Zhang, Wei Liu, Deli Gao   +3 more
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The Rock-Breaking Mechanism of Thermal Spalling-Assisted Rock Cutting by PDC Cutter

Rock Mechanics and Rock Engineering, 2023
Feilong Yang, Weiji Liu, Xiaohua Zhu, Chang Xiang   +3 more
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Development of bit design for breaking rocks with different mechanical properties

Nafta-Gaz
This paper presents a description of a bit design with a combined cutter layout, aimed at increasing the efficiency of breaking rocks with different mechanical properties. The results from industrial testing of the manufactured bits are analyzed, revealing the need to improve their hydraulic flushing system.
Mykola Seniushkovych, Ivan Vytvytskyi, Oleh Martsynkiv, Volodymyr Tyrlych, Andrii Vytiaz   +4 more
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