With the BHA hanging from a hang-off plate during three nautical miles of rig sailing, Equinor and Baker Hughes managed to drill eight top holes on two different templates way ahead of schedule.

There is always a discussion about where to put the most flow, through the bit or through the hole opener. There are as many points of views on this topic as there are specialist working with top hole drilling. The question is - when 20% of the opening effect comes from the bit and 80% comes from the hole opener, shouldn't that be reflected in the flow distribution?