Results 211 to 220 of about 5,303 (265)

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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On the rock-breaking mechanism of plasma channel drilling technology

Journal of Petroleum Science and Engineering, 2020
Abstract Plasma channel drilling (PCD), which is also known as high-voltage electric pulse drilling, is a highly efficient rock-breaking drilling technology with great development potential. This paper presents a method to study the rock-breaking mechanism of PCD technology.
Xiaohua Zhu, Yunxu Luo, Weiji Liu
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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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Research on rock-breaking mechanism of cross-cutting PDC bit

Journal of Petroleum Science and Engineering, 2018
Abstract Cross-cutting PDC (Polycrystalline Diamond Compact) bit is an efficient drilling technology that increases the rock-breaking efficiency and prolongs the service life of the bit through forming mesh-like pattern in the bottom-hole. This paper studies the rock-breaking mechanism of the cross-cutting PDC bit with the combination of both ...
Yingxin Yang, Chunliang Zhang, Min Lin, Lian Chen   +3 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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Mechanism and effect of jet parameters on particle waterjet rock breaking

Powder Technology, 2017
Abstract The particle (spherical steel particles) waterjet is a new type of waterjet that can effectively break rocks and other materials. In this study, the simulation combined with the experimental procedure was conducted for optimization of the jet parameters (such as velocity, water pressure, dwell time, concentration, diameter, and standoff ...
Jian Zhao, Guicai Zhang, Yiji Xu, Ruihe Wang, Weidong Zhou, Liexiang Han, Yi Zhou   +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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