METHOD FOR DEGREASING DRILLING WASTE AND DEVICE FOR DEGREASING Russian patent published in 2019 - IPC B09B5/00 

FIELD: technological processes.

SUBSTANCE: method of degreasing drilling waste contains separation of drill cuttings from drilling mud, unloading drill cuttings in the sludge pit, chemical processing sludge to obtain a composite mixture, including humic mineral component, installation of drill cuttings separators, which are metal fittings in the form of bottom-free cells arranged and fixed, at least on top thereof, unloading drill cuttings inside the formed cells with filling each 80 % by volume. Chemical processing is carried out in portions – separately in each of the cells with constant stirring. Amount of the humic mineral component is introduced at the rate of 3–5 % of the total amount of drill cuttings and mixed within 30–60 minutes. Significant parameters are controlled to achieve values below the maximum permissible concentrations. Reinforcement is removed from the pit, soil from the restored areas is added thereto. Device for disposal of drilling waste contains separators in the form of metal reinforcement for mounting inside a sludge pit in a structure with vertically oriented cells without a bottom, a metal grate installed over the reinforcement. Guides in the form of rails with movable working platform are made on the grate. Grate has a place for the operator and is arranged to accommodate reagents and equipment for mixing the drill cuttings.

EFFECT: use of the claimed group of inventions provides an improvement in the quality of the neutralized drill cuttings.

10 cl, 1 dwg