Drilling Innovation’s technologists and drilling crew under the direction of Fedchenko S. and Siberian Service Company’s technologist Aksinin S. set the hydraulic whipstock BS-168 on the depth 2145 m. For window milling was used two reaming mills with OD 146,0 and 145,5 mm.

The first reaming mill lost 0.5 mm during the milling process and second one saved his starting diameter.

The BHA for sidetracking passed through the window without any problem. So engineering service of Drilling Innovation Ltd lasts only two days.