The AO OKB Zenit together with the specialists of  OAO Samotlorneftegaz developed and implemented a new technology of hydraulic fracturing interval when pumping cemented and  uncemented horizontal directional trunks in multilayer deposits in the open trunk diameter of at least 121 mm for ZHB, and not less than 139.7 mm ZHB

 FRAC SLEEVE FS LCSB- 4" (102) with soluble balls used in tandem with FRAC BALL-DROP SLEEVE FBDS - 4" (102) that allows for Multi-Stage  Fracturing in 102mm liner in cemented interval deflated in 140mm casing.