Drilling Systems, LLC has completed the works under three-year contract of operational wells construction for LUKOIL-PERM Company. Over a period of 2012-2016 it has been constructed 64 wells, 34 of them are horizontal. 9 horizontal wells were developed with multistage acid hydraulic fracturing of layer, 2 horizontal wells were conducted using technology of selective multistage acid hydraulic fracturing. Now drilling of multilateral well are carried out on Belskoye oilfield.