This work shows that rotary retort distillation is a conceptually feasible alternative for removal of oil from cuttings produced while drilling with oil base mud. The work specifically examined the response and behavior of oil base mud drilled cuttings and associated fluids to heat in a tumbling bed. These test results established the temperature requirements necessary to clean oil base mud cuttings to various cleaning limits. Heat transfer coefficients have been calculated for the test apparatus. These heat transfer coefficients have been used to establish the size of a full scale unit necessary to process 15 metric tonne/hr of drilled cuttings. The recovered products, cuttings and oil have been evaluated for toxicity. The dried cuttings were evaluated with a metal leachate test to establish extraction procedure toxicity. The distillation products were chemically analyzed and the amount of noncondensable gas was estimated.

Finally a conceptual retort design is proposed for the offshore environment. Energy consumption and operating costs for a typical well are estimated.

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