Pipe is pipe.
If you're planning on going 2000m (2km's) deep you need a lot of it. I don't think they will go past 1500m. Since you pay by the metre it should not cost full price for the 1500m as the first 500 is done. So yes it would be safe to assume we will only get 1000m of new core per hole.
This is just speculation on my part.