FIELD: petroleum industry.
SUBSTANCE: invention is referred to mining engineering and can be used for drilling of oil and gas wells. The system includes drill mud makeup and circulation unit equipped with mixing, dozing systems, rough filtering - mud screens and desanders and fine filtering - desilters, degasser, liquid drill drains treatment system with electrocoagulator, electroflotator, sectional distributing tank, filtering unit, returns disposal and storage unit including mud pit which consists of drilling wastewater collector and solid wastes storage area - slurry reservoir. Liquid drill drains treatment system includes a centre of knockout cyclones, inlet of the knockout cyclones centre being connected with outlet of sectional distributing tank and discharge to inlet of the electroflotator. Wastewater treatment level is improved and environmental requirements are met.
EFFECT: improved level of wastewater treatment.
6 cl, 1 dwg, 3 tbl
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