Patent attributes
A process for recovering weight material for reuse in drilling fluids from a previously unavailable source of feed stock. The process described herein includes a process of cleaning drilling waste through either low temperature thermal or solvent washing to remove hydrocarbon or water based drilling fluid contamination. The cleaned drilling waste, substantially free of liquids is sifted and the bulk fraction is further treated by employing conventional separation technology to recover a high gravity solids phase while discarding low gravity solids phase as tailings. Additionally, described is a process where the recovered high gravity solids phase can be reused as a high density weight material, or lower cost weight material, either of which is desirable to the drilling of modern oil and gas wells. The process of adding drilling fluid back into the recovered weight material to simplify the process of transporting the weight material into an active drilling fluid system is also described.
