Results 1 to 10 of about 138 (127)
3D Numerical Simulation and Experiment Validation of Dynamic Damage Characteristics of Anisotropic Shale for Percussive-Rotary Drilling with a Full-Scale PDC Bit [PDF]
Energies, 2018 The lower rate of penetration (ROP) is one of the key technical difficulties during drilling of shale reservoirs. Percussive-rotary drilling (PRD) is crucial for increasing ROP.
Ping Chen, Guangjian Dong
exaly +4 more sources
Evaluation of the energy efficiency of rotary percussive drilling using dimensionless energy index
Journal of Rock Mechanics and Geotechnical Engineering, 2022 This paper sets forth a geomechanics framework for assessing the energy efficiency of rotary percussive drilling using the energy criterion, which has been proposed by Victor Oparin for volumetric destruction of high-stress rocks having nonuniform ...
Vladimir Karpov, Anton Konurin
exaly +3 more sources
Percussive-Rotary Drilling Machine
Наука и техника, 2003 The paper contains description of percussive-rotary drilling machine which is designed for hole sinking in the process of engineering and geological research.
G. T. Shiroky, M. A. Litvin
doaj +2 more sources
Bioinspired Drilling for Extraterrestrial Applications [PDF]
BiomimeticsThis review presents the novel synthesis of nature-inspired drilling strategies specifically tailored for extraterrestrial environments, where conventional technologies fail under the environmental conditions and power and mass constraints.
Gal-Erdene Battsengel +3 more
doaj +2 more sources
Theoretical analysis and design of hydro-hammer with a jet actuator: An engineering application to improve the penetration rate of directional well drilling in hard rock formations. [PDF]
PLoS ONE, 2018 Rapid horizontal directional well drilling in hard or fractured formations requires efficient drilling technology. The penetration rate of conventional hard rock drilling technology in horizontal directional well excavations is relatively low, resulting ...
Jiang-Fu He +3 more
doaj +2 more sources
Simulation and Analysis of a Split Drill Bit for Pneumatic DTH Hammer Percussive Rotary Drilling
GeofluidsReverse circulation impact drilling has the advantages of high drilling efficiency and less dust, which can effectively form holes in hard rock and gravel layer.
Yuanling Shi, Conghui Li
doaj +2 more sources
Journal of Rock Mechanics and Geotechnical EngineeringRock and geotechnical engineering investigations involve drilling holes in ground with or without retrieving soil and rock samples to construct the subsurface ground profile.
Yafei Qiao, Manchao He, Yue Qzq
exaly +3 more sources
Journal of Rock Mechanics and Geotechnical EngineeringThis paper focuses on the use of rotary-percussive drilling for hard rocks. In order to improve efficiency and reduce costs, it is essential to understand how operational parameters, bit wear, and drilling performance are related.
Qian Fang, Jiayao Chen, Guoli Zheng
exaly +3 more sources
High Efficiency Drilling Methods for Through Beds Hole in Underground Coal Mine
Meikuang Anquan, 2020 Considering the drilling efficiency problem encountered by crossing holes in underground coal mine, the paper divided roof and floor rock stratum into three grades in order to facilitate the study of technology in underground coal mine: high hard rock (4≤
DOU Xuqian
doaj +1 more source
IEEE Access, 2018 Compared with conventional drill, an ultrasonic drill can break into rocks under lower weight on bit and lower power, which is more suitable to sample in low gravity environment for deep-space exploration. However, the ultrasonic drill cannot remove rock
Yinchao Wang +5 more
doaj +1 more source