METHOD AND SYSTEM FOR TREATING DRILL CUTTINGS SLURRIES AND THE LIKE

摘要

DP 50-6-929A Drill cuttings, and similar slurries or mixtures oily solid particles, are treated by a dryer apparatus which vaporizes the liquid and discharges relatively large solid particles for disposal. Vapor and entrained solid fines are conveyed from the dryer to a condenser and then to a rotary drum vacuum filter having a precoated filter media disposed thereon. The solid fines are filtered by the filter media comprising diatomaceous earth or perlite and the clarified condensed liquid is conveyed to separator means for separating oil, water and any other liquids present. The filter media stripped from the filter and contaminated with entrapped solid fines is conveyed through the dryer means and disposed with the solids particles being discharged from the dryer. The system is particularly adapted for offshore drilling operations wherein the dried solids comprising drill cuttings and diatomaceous earth may be discharged to the sea after separation from all contaminants such as oil and other liquids in the drilling fluid.