in petrobtras i trust, page-12

Ya, could you (or any other drilling guru's) kindly explain something about the drilling plan for me?

On the Time vs Depth Curve, what would be due to occur between 3200 and 3350 odd metres that will take 4-5 days? Isn't this the time they will be casing and cementing the 12 1/4" hole?

The bit i don't get is there seems to be two short drill's of around 75 metres before the final 200 metre push to T.D. What are the two short drilling periods for?

Also is there any chance they would backflip and production test the well? What would be the precursors for a backflip? I'm pretty sure Heron was not going to be production tested pre spud, but they went and did it after logging.

Cheers all...