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Drillability studies
Bureau of Mines made drillability studies with impregnated diamond bits in laboratory on seven rock types and in field of 21 different rock types; drill parameters of rotational speed, thrust, and torque must produce sufficient applied forces to induce stress levels that cause continuous failure in rock to achieve efficient penetration rates; higher rotational speeds appear to be more effective in drilling relatively harder rocks, although increased speed causes more bit wear; increases in thrust result in higher drilling rates but not linearly; and up to critical value linear relation exists between torque and penetration rate for specific rock type.
Drillability studies
Bureau of Mines made drillability studies with impregnated diamond bits in laboratory on seven rock types and in field of 21 different rock types; drill parameters of rotational speed, thrust, and torque must produce sufficient applied forces to induce stress levels that cause continuous failure in rock to achieve efficient penetration rates; higher rotational speeds appear to be more effective in drilling relatively harder rocks, although increased speed causes more bit wear; increases in thrust result in higher drilling rates but not linearly; and up to critical value linear relation exists between torque and penetration rate for specific rock type.
Drillability studies
U S Bur Mines -- Report Investigations
Paone, J. (author) / Madson, D. (author)
1966
16 pages
Report
English
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