Results 21 to 30 of about 140,868 (311)

Laboratory Experimental Study on Rock Breaking Efficiency and Stability of PDC Bit

Shiyou jixie, 2020
In order to evaluate the rock breaking efficiency and stability of the newly developed PDC bit in the target lithologic formation, and guide the optimization, improvement and efficient use of the newly developed PDC bit, full scale laboratory rock ...
Zhang Jiawei, Meng Zhao, Ji Guodong, Cui Meng, Wang Haige, Yang Xiongwen, Yu Lianjie   +6 more
doaj   +1 more source

Rock Breaking Efficiency Analysis of PDC Bit Based on Pointing Angle of Controllable Bent Sub

Shiyou jixie, 2021
In order to improve the rock breaking efficiency of the directional downhole closed-loop controllable bent sub, the ABAQUS software was used to conduct dynamic simulation analysis on the continuous sandstone breaking by the PDC bit under the pressurized ...
Zhang Guangwei, Xiang Lin, Gao Situ, Hou Pengpeng   +3 more
doaj   +1 more source

Numerical Simulation Study on Rock Breaking Efficiency of Shield Cutters in Large-Size Boulder Strata

IOP Conference Series: Earth and Environmental Science, 2021
Abstract Tearing cutters are generally applied to break rocks when shield tunnelling in the strata with large size boulders. To improve rock breaking efficiency, the processes of tearing cutter impacting rock model are simulated, and the effects of cutter mass, impact velocity and spacings on specific energy of rock breaking are studied.
Jinguo Cheng, Jiang Hua, Qu Xingtong, Yusheng Jiang, Changhao Li   +4 more
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Research on Cutter Surface Shapes and Rock Breaking Efficiency Under High Well Temperature

SSRN Electronic Journal, 2022
Dongdong Song, Zhangping Ren, Yingxin Yang, Haitao Ren   +3 more
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The effects of process parameters on the rock-breaking efficiency of multi-nozzle jet

Journal of Petroleum Science and Engineering, 2021
Abstract This paper examines the effect of multi-nozzle bit on sandstone specimens by means of numerical simulation and experiment, and the rationality is verified. Numerically, the effects of jets with different diameters and angles on rock were simulated by using LS-DYNA, and the rock-breaking shapes of jets with different angles are analyzed ...
Lipeng He, Yanbao Liu, Yanqing Wu, Haitao Sun, Kai Shen, Xuelin Yang   +5 more
openalex   +2 more sources

Effect of antenna size on rock mass breaking efficiency under open-ended microwave treatment

Thermal Science
Antenna size is a critical factor influencing the efficiency of open-ended microwave rock-breaking. An electromagnetic-thermal-mechanical coupling model was developed to systematically investigate the influence of antenna size on the temperature distribution within the rock mass under microwave treatment.
Shou-Ning Xue, Yang Zhang, Jun Luo, Feilong Xu, Bengao Yang   +4 more
openalex   +3 more sources

An experimental study of the effect of temperature on teeth breaking efficiency based on rock mechanical properties

Natural Gas Industry B
To master changes in rock mechanical properties and the impact of high temperature on rock-breaking efficiency, the rock mechanical properties of granite, limestone, and sandstone under different temperatures and single-tooth static-pressure experiments were studied.
Dongdong Song, Mingmin He, Jian Wang, Heyi Yuan, Ke Liu, Zijie Li, Heng Yin, Jun Yan, Yingxin Yang, Zhen Liu   +9 more
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Study on Rock Breaking Efficiency of Non Planar PDC Teeth

Academic Journal of Science and Technology
 In order to explore the law of rock breaking efficiency of existing non planar teeth in sandstone, indoor single tooth rock breaking experiment and numerical simulation of rock breaking are carried out for planar teeth, sharp circular teeth and axe teeth, and the effects of different eating depth and rake angle on rock breaking efficiency of PDC teeth
Feng Ling
openalex   +3 more sources

Improving efficiency of rock breaking using pre-weakening of rock mass [PDF]

Eurasian Mining, 2023
Erbolat Aben, Zinovii Malanchuk, В. С. Федотенко, B. A. Orynbaev   +3 more
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The Influence Mechanism of Conical Pick Wear on Rock Breaking Efficiency Based on Indentation Tests [PDF]

Eng
With the deepening of mineral resource exploitation, conical picks are subjected to severe wear under high-stress and high-friction conditions, which has become a critical factor governing rock-breaking efficiency.
Yunfei Xia, Youlu Yuan, Hongchao Wang, Lei Lyu   +3 more
doaj   +2 more sources