Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 5 of 5 for “"Bit–rock interaction"”.
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Effects of bit geometry in multiple bit-rock interaction
The impact of bit-coal/rock interaction during the cutting process in underground mines is great concern to the mining community of the world. Rock/coal cutting bears directly on rock/coal dust generation that causes "black lung/silicosis" in miners. On the other hand, rock cutting generates …
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Integrated dynamical models of down-the-hole percussive drilling
… it, e.g., the hammer thermodynamics or the interaction between the bit and the rock. Following this paradigm, the assessment of the process performance is typically performed by considering a single percussive activation and a single interaction cycle between the bit and the rock, from …
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Peridynamics and Applications
… Next, an efficient algorithm to model the bit-rock interaction process based on the variable horizon peridynamics is developed. This model iterates adaptively with the propagation of the crack and with the penetration of the drill bit. The crack propagation in the rock is captured in this …
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Influence of Bit Design on the Stability of the Rotary Drilling System
… which can lead to drilling dysfunctions such as bit bounce, stick-slip and whirling. These dysfunctions cause premature failure of drill bits and other components within the system, ultimately leading to increased cost of the drilling operation. It is of interest, therefore, to understand the …
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A drilling forensic framework and algorithm for the analysis and diagnoses of drilling dysfunction.
… by the rate of penetration of the drill bit. Drilling dysfunctions result in wasted energy, reduced penetration rates, and potential damage to the bottom hole assembly or drill bit which can significantly impact overall drilling performance, costs, and emissions. These dysfunctions often …