Results 11 to 20 of about 3,562,404 (304)
MachinesAccurately predicting the drilling efficiency of rotary drilling is the key to achieving intelligent construction. The current types of principle analysis (based on traditional interactive experimental methods) and efficiency prediction (based on ...
Cunde Jia +7 more
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Comparison of the accuracy and efficiency of robot-assisted implant placement using trephine versus conventional serial drilling: an in vitro study [PDF]
BMC Oral HealthBackground This study aimed to compare the accuracy and efficiency of implant-site preparation and placement between conventional serial drilling and trephine drilling, with assistance from an implant robot, on varying bone surface inclinations.
Ning Zhu +3 more
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Aspects of energy requirements for rock drilling [PDF]
, 1974 Development of laboratory rock breakage techniques to relate energy and surface area produced by slow compression, drop hammer and stamp mill. A detailed study of laboratory rotary-percussive drilling in a wide range of rocks under different ...
Wootton, David
core +7 more sources
Energies, 2023 The relevance of the application of hydraulic thruster technology is determined by the technological limitations of drilling both vertical and horizontal wells.
Andrey A. Kunshin +4 more
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Sensors, 2023 When drilling deep wells, it is important to regulate the formation pressure and prevent kicks. This is achieved by controlling the equivalent circulation density (ECD), which becomes crucial in high-pressure and high-temperature wells.
Mohammed Al-Rubaii +4 more
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Drill Cuttings Disposal Efficiency in Offshore Oil Drilling
Journal of Marine Science and Engineering, 2023 The relevance of the study lies in the fact that with the depletion of conventional oil and gas reserves and an increase in the global demand for hydrocarbons, the focus of the industrial sector is gradually shifting towards the resources of the Arctic, which have tremendous potential for development.
Alexey Cherepovitsyn, Andrey Lebedev
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Appraising Efficiency of OpSite as Coolant in Drilling of Bone [PDF]
Journal of Orthopaedic Surgery and Research, 2020 Abstract Background: During drilling of bone, which is common in clinical surgeries, heat generation increases local temperature in the drilling site. Transmission of excessive heat to the surrounding bone tissue can cause thermal osteonecrosis.
Mohammad Reza Effatparvar +2 more
openaire +6 more sources
Directional drilling technologies equipment and application for hard rock in underground coal mines
Meikuang Anquan, 2021 According to the problems existing in directional drilling of hard rock in coal mines, such as low drilling efficiency, easy bearing pressure in deep hole drilling and easy damage of drilling tools in hole, based on the analysis of the causes of the ...
DOU Xuqian, WANG Li
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INFLUENCE OF DRILLING RIG DESIGN ON WELL DRILLING EFFICIENCY
Sustainable Development of Mountain Territories, 2020 The purpose of research in the extraction of minerals is the development of technologies that will make it possible to drill wells specially designed for the extraction of ores with a length of several kilometers and a diameter of 300 mm to 2 m. The main research method is an experiment, during which drilling of wells by alternative methods under the ...
Vasily ANISCHENKO, Viktor ATRUSHKEVICH
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Trajectory Control Technology of Bedding Drilling in Medium Thick Coal Seam
Meikuang Anquan, 2020 There are some problems existing in the field application of progressively extended drilling technology such as unclear active exploration distance, high probability of outside the coal seam, exploration inefficiency and so on.
DONG Haichao, ZHAO Yongzhe
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