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The response mechanism and testing method of the rock elastic modulus while drilling
Geomatics, Natural Hazards & RiskThe elastic modulus is a basic parameter reflecting the deformation resistance and energy concentration characteristics of rock. The traditional testing method of the rock elastic modulus needs to core the surrounding rock and testing it in the ...
Bei Jiang +7 more
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Shock and Vibration, 2017 Based on an optimized lunar regolith coring bit (LRCB) configuration, the load characteristics of rotary-percussive drilling of lunar rock simulant in a laboratory environment are analyzed to determine the effects of the drilling parameters (the ...
Peng Li +3 more
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The Anatomical Record, EarlyView.Abstract The Pleistocene is a key period for understanding the evolutionary history and palaeobiogeography of the European rabbit (Oryctolagus cuniculus). The species was first documented in southeastern Iberia at the beginning of the Middle Pleistocene and appears to have rapidly spread throughout Southwestern Europe, where it was found in numerous ...
Maxime Pelletier
wiley +1 more source
Numerical Simulation on Dynamic Response of Drilling Parameters in Loaded Rock Mass
Applied SciencesThe characterization of the mechanical parameters of rock mass is a basic problem in the field of rock mechanics, and it is also an important basis for surrounding rock classification, stability analysis, and support design in underground engineering ...
Yujing Jiang +5 more
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Petrography and petrology of the Hawaii Scientific Drilling Project lavas: Inferences from olivine phenocryst abundances and compositions [PDF]
, 1996 The Mauna Loa (ML) and Mauna Kea (MK) lavas recovered by the Hawaii Scientific Drilling Project (HSDP) include aphyric to highly olivine-phyric basalts.
Alves, Sophie +2 more
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The Anatomical Record, EarlyView.Abstract Hadrosaurid dinosaurs are generally regarded as “crested” or “non‐crested” depending on the presence or absence of a bony cranial crest. At least one supposedly “non‐crested” hadrosaur is known to have possessed a soft tissue cranial crest (or comb), based on an exceptionally preserved “mummified” specimen. Here we redescribe this specimen and
Henry S. Sharpe +4 more
wiley +1 more source
Записки Горного института, 2019 Compliance with drilling operations requirements is achieved by introducing advanced approaches to the management of the drilling process. Main requirement is to reduce the time and material costs for construction of the well.
V. V. Neskoromnykh, M. S. Popova
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Energy Reports, 2020 Rate of penetration (ROP) is affected by many factors (i.e. rock properties, drilling parameters), and the increase of ROP is required to meet the needs of modern drilling operations.
Heng Zhang +4 more
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Archaeological Prospection, EarlyView.ABSTRACT Satellite remote sensing is among the most significant modern methodologies supporting field archaeology. In addition to its efficiency in identifying archaeological sites, remote sensing offers a safe and cost‐effective approach in conflict zones.
Amal Al Kassem +5 more
wiley +1 more source
Research on the Step Drilling System for Water Jet Radial Drilling
Shiyou jixie, 2021 The low traction force of the front-end nozzle for water jet radial drilling limits the drilling distance. The ground run drilling method has complex force transmission, large run-in-hole fluctuation, and has difficulty in the ground precise control of ...
Chen Zhi +5 more
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