Study on the Mechanism of High-Efficiency Rock Breaking by Hydraulic Jet Based on Explicit Dynamics [PDF]
Processes, 2023 High-efficiency rock breaking by hydraulic jetting is the key to radial horizontal drilling technology. In order to improve the drilling efficiency of hydraulic jet rock breaking in radial horizontal wells, based on LS-Dyna display dynamics, a numerical simulation model of single-nozzle jet rock breaking was established to analyze the influence of ...
Gang Bi +6 more
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A Method for Evaluating the Rock Breaking Efficiency of Cutters and Optimizing the PDC Cutter Profile—A Study of Igneous Rock Formations in Shunbei Oilfield [PDF]
Energies, 2022 The Permian igneous rock in Shunbei Oilfield exhibits high rock strength, which results in a low rate of penetration (ROP) and shortens the cutter’s service life. It is necessary to analyze and evaluate the rock breaking effect of cutters.
Zhuoxin Dong +6 more
doaj +2 more sources
Numerical investigation on rock‐breaking mechanism and cutting temperature of compound percussive drilling with a single PDC cutter [PDF]
Energy Science & Engineering, 2021 Compound percussive drilling technology is a new method to improve the rock‐breaking efficiency in deep hard formation. In order to study the rock‐breaking mechanism of compound impact drilling, the thermal‐structure coupling simulation of the dynamic ...
Wei Wang +5 more
doaj +3 more sources
Energy Exploration & ExploitationTo expedite drilling operations in hard rock of coal mines, a new type of impact-shear drill bit was developed, and its mechanism of speed-up and efficiency increase was studied. The RHT constitutive model was used to describe the structural behavior of rock, and the rock-breaking simulation model of full-size bit was established.
Pei Ju, Dongzhuang Tian
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Research on the modulation mechanism and rock breaking efficiency of a cuttings waterjet [PDF]
Energy Science & Engineering, 2019 The feasibility of a cuttings waterjet directly modulated in the bottom hole is discussed from the aspects of cuttings suction and rock‐breaking efficiency.
Peng Wang +5 more
doaj +2 more sources
Study on Microwave-assisted TBM Double-edged Cutter Rock-breaking Efficiency and its Positional Relationship [PDF]
Eksploatacja i Niezawodność – Maintenance and ReliabilityIn this study, based on a microwave test, the discrete element program (PFC) is used to establish a microwave-assisted disc cutter rock-breaking model and explore the influence law of the positional relationship between microwave radiation and disc cutter penetration on rock-breaking efficiency, and the results show that: The improvement of the ...
Sen Wen +4 more
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Rock‐breaking mechanism and efficiency of straight‐swirling mixed nozzle for the nondiagenetic natural gas hydrate in deep‐sea shallow [PDF]
Energy Science & Engineering, 2020 Jet breaking using a high‐pressure nozzle is one solution for breaking natural gas hydrate (NGH) formations, creating a larger breaking volume and fluidizing broken solid fragments.
Yang Tang +4 more
doaj +2 more sources
Fuzzy Comprehensive Evaluation Method of Cone Bit Teeth Rock-breaking Efficiency
Shiyou jixie, 2016 Considering that the current evaluation method of rock-breaking efficiency is deficient,fuzzy comprehensive evaluation method was used to analyze the teeth rock-breaking efficiency by using of rock breaking by using rock-breaking volume,area and depth as
Deng Rong +3 more
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Enhancing CO2 Injection Efficiency: Rock-Breaking Characteristics of Particle Jet Impact in Bottom Hole [PDF]
AtmosphereStoring CO2 in oil and gas reservoirs offers a dual benefit: it reduces atmospheric CO2 concentration while simultaneously enhancing oil displacement efficiency and increasing crude oil production. This is achieved by injecting CO2 into producing oil and gas wells.
Zhichao Wang, Jian Zhao
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Analysis of Rock-Breaking Load Characteristics and Efficiency Optimization of Conical Cutterhead Hobs in Urban Hard-Rock SBM [PDF]
EngTo investigate the load characteristics and rock-breaking efficiency of the hobs on the conical cutterhead, a theoretical model of the hob’s rock-breaking load was established based on the plastic-brittle characteristics of rock, with a verification ...
Geqiang Li +5 more
doaj +2 more sources