It took a little more than a day for Drilling Innovation’s staff to pick up, run, land the BS-146 and cut the window in 5-3/4” ( 146 mm) casing with drilling a rat hole.

On August 2nd, 2013 on well no. 4751 Ashalchinskoye oilfield by Drilling Innovation was cut the window in 5-3/4” production casing. Due to proper selected BHA for window cutting and high quality of applied equipment (there is no mill under gage) it was provided a free passage of bits for 4.87” (123.8 mm) drilling a sidetrack.