Categorization of the drilling waste as a criterion of selecting the methods of their detoxication, recovery and management

* AGH University of Science and Technology, Faculty of Drilling, Oil and Gas, Krakow, Poland ** AGH University of Science and Technology, Faculty of Geology, Geophysics and Environmental Protection, Krakow, Poland *** University in Stavanger, Faculty of Science and Technology **** The research leading to these results has received funding from the Polish-Norwegian Research Programme operated by the National Centre for Research and Development under the Norwegian Financial Mechanism 2009–2014 in the frame of Project Contract No. Pol-Nor/200375/58/201 Andrzej Gonet*, Jerzy Fijał**, Aleksandra Jamrozik*, Stanisław Stryczek*, Torleiv Bilstad***