Results 251 to 260 of about 143,249 (287)

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
openaire   +3 more sources

TBM-cutter rock-breaking effect and mechanism considering different cutting sequences

Bulletin of Engineering Geology and the Environment, 2022
Mengmeng Hu, Bo Zhang, Biao Li, Bin Liu, Wenzheng Cao, Bin Xu   +5 more
openaire   +3 more sources

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
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

Laser rock-breaking mechanism considering rock inhomogeneity and the temperature effect

Computers and Geotechnics
Zhengkuo Ma, Chunshun Zhang, Congying Li, Wei Wei, Jie Dong   +4 more
openaire   +3 more sources

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
openaire   +1 more source

Experimental study on the rock-breaking mechanism of disc-like hybrid bit

Journal of Petroleum Science and Engineering, 2018
Abstract In order to solve the problems of low rate of penetration (ROP) and short service life of the bit drilling in hard formation, and further improve the performance of conventional hybrid bit, a hybrid bit, disc-like hybrid bit (DLHB) is put forward. The hybrid bit has the advantages of conventional Polycrystalline Diamond Compact (PDC) bit and
Shiwei Niu, Hualin Zheng, Yingxin Yang, Lian Chen   +3 more
openaire   +1 more source