Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Drilling speed increased with concave bit
Mathematical condition that satisfied requirements of efficient tip was parabolic shape; new design transfers energy more efficiently to rock, which is thereby fractured more easily; new shape tends to focus stress waves within cylindrical volume of rock that is being drilled, and this energy is concentrated in formation of hole instead of being fanned out and, to some extent, dissipated in other directions.
Drilling speed increased with concave bit
Mathematical condition that satisfied requirements of efficient tip was parabolic shape; new design transfers energy more efficiently to rock, which is thereby fractured more easily; new shape tends to focus stress waves within cylindrical volume of rock that is being drilled, and this energy is concentrated in formation of hole instead of being fanned out and, to some extent, dissipated in other directions.
Drilling speed increased with concave bit
Min Chem Eng Rev
1961
Aufsatz (Zeitschrift)
Englisch
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