DRILLING RETURNS STERILISATION METHOD Russian patent published in 2010 - IPC B09C1/10 

FIELD: oil-and-gas industry.

SUBSTANCE: method includes dewatering in natural environment, according to which withdraw a drilling returns on a even surface with a help of caterpillars, dry under the sun, inject a mineral white for the bonding and transforming a easily dissolving salts in to hardly dissolving ones and for the slush hardening, then add into dried mass a dung or a peat, activated with mineral fertilisers, dry the mass under the natural environment conditions till moisture content value 8-14%, which leads its volume shrinking 6-8 times, after that cut with caterpillars and on a mechanical content heavy soils at underlying layer capacity depth not less than 15-20 m - again store in storage places and press, then fill with a mineral soil with layer depth 1.5-2-5 m, and from the top with a 20-40 sm fertile layer, and at mechanically soft soils - sterilized and dried slam to be transported to industrial waste polygons for burial.

EFFECT: easy and economical drilled return sterilisation method.