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An analytical elucidation of the influence of surfactant on rock drilling by shear/drag bit
Summary We explain analytically the effects of surfactants on the enhancement of drilling rates in rock. We propose that the weakening effect is not simply due to the chemical action of the surfactant, as suggested by Rebinder in the 1930's but to a combination of mechanical and chemical interactions. We apply a fracture mechanics approach to elucidate surfactant-assisted drilling. An analysis of the chip formation process during rock cutting by a shear/drag bit has shown that the surfactant-induced damage zone develops in rock primarily in front of the individual bit, and its size can be as much as twice the thickness of the removed chips. This analysis allows us to estimate the influence of surfactants on cutting forces.
An analytical elucidation of the influence of surfactant on rock drilling by shear/drag bit
Summary We explain analytically the effects of surfactants on the enhancement of drilling rates in rock. We propose that the weakening effect is not simply due to the chemical action of the surfactant, as suggested by Rebinder in the 1930's but to a combination of mechanical and chemical interactions. We apply a fracture mechanics approach to elucidate surfactant-assisted drilling. An analysis of the chip formation process during rock cutting by a shear/drag bit has shown that the surfactant-induced damage zone develops in rock primarily in front of the individual bit, and its size can be as much as twice the thickness of the removed chips. This analysis allows us to estimate the influence of surfactants on cutting forces.
An analytical elucidation of the influence of surfactant on rock drilling by shear/drag bit
Staroselsky, A. V. (author) / Kim, K. (author)
Rock Mechanics and Rock Engineering ; 30 ; 145-159
1997-07-01
15 pages
Article (Journal)
Electronic Resource
English
An Analytical Elucidation of the Influence of Surfactant on Rock Drilling by Shear/Drag Bit
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