ABSTRACT: The effect of surfactant on rock cutting is evaluated using the fracture mechanics approach. Experiments are carried out to elucidate the mechanics of the surfactant assisted fracture development during rock cutting. The mathematical model developed based on the observation hypothesizes that two types of fractures are created by cutting action under the influence of surfactant, namely shallow surface cracks created mechanically and deeper fractures induced by the aid of surfactant. This model permits an estimate of the surfactant influence on cutting force.

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