The technologists of our company jointly with windows cuttings team from Siberian Service Company Close Corporation have used BS -168 whipstock with hydraulic anchor at 2473 ft. (754m) depth in well no.23 of East - Tarkosalinskoye oilfield (Siberia, Russia). It took only 6.5 hours for cutting the window including the setting of whipstock.

In some intervals the ROP reached 10 ft/hr. However, this had no impact on the quality of provided whipstock services. BHA for drilling the lateral hole (including PDC bit, DRU -120 downhole motor, telesystem) has passed through the window without any problems.