From my (much younger) days working as a roughneck, if you're "drilling" only through water, and have a crack crew with good reinforcements to spell them off when they get tired, 4 minutes per section might just be possible if everything goes perfectly.
No crew I worked on ever got close to that, thank goodness, since we were drilling hard stuff, so we roughnecks got lots of chances to sneak off to the boiler hut to try to catch up on our sleep during those night shifts... LOL