METHOD FOR NEUTRALISATION OF DRILLING WASTES Russian patent published in 2009 - IPC B09B3/00 C09K8/02 

FIELD: environmental protection.

SUBSTANCE: invention is related to the field of environmental protection, in particular to neutralisation of drilling wastes produced in construction of horizontal wells. Method includes neutralisation of drilling wastes by means of their treatment in mixer with lime-containing waste. As lime-containing reagent, lime-containing waste is used, for instance chemical water treatment sludge, with ratio of drilling waste volume to lime-containing waste 1:(1-2). Additionally neutralisation product is dehydrated (dried) under natural conditions on specially equipped platforms down to humidity of not more than 55%. It provides for increased efficiency and manufacturability of drilling wastes neutralisation method.

EFFECT: method makes it possible to decontaminate directly spent drilling solution without preliminary separation of drilling sludge, and also to produce neutralisation product that may be used as fertiliser.

4 cl, 20 tbl, 3 ex