Waste disposal of contaminated drill cuttings from geological drilling using drilling fluid systems containing mineral oil

摘要

Described is the use of ecologically compatible, and more particularly of biologically degradable, oils having flash points of above 80° C. for washing mineral oil-loaded drill cuttings prior to the disposal thereof by off-shore and/or on-shore deposition. For the use as wash oils there are preferred aerobically and/or anaerobically degradable low- viscosity oils are employed which are also suitable for being used as a mixture component of the continuous oil phase of W/O invert drilling fluids.