Because the tools form part of the drill string, they must be hollow to allow the drilling mud to pass through to the bit, where it provides lubrication and cooling and carries the rock cuttings back to the rig.
The control pod will open the valves that allow the drilling mud to be forced into the well.
Once the entire wall surface is covered, allow the drywall mud to dry for 24 hours.
It took all my self-control to allow my daughter to play in the mud, to cross a street by herself (after looking both ways several times and with a crossing guard present) and eventually, to get her driver's license.
When the hole is filled with mud, dig out the mud and allow the water to drain to a level below the depth of the mud channel.
Each time the hole is filled with mud, dig out the mud and allow the remaining water to settle for a few minutes.
Having the first coat of mud, which you'll apply directly over the seam, a bit runnier than normal will allow the tape to bond well with the mud.
This is one of the reasons that the relief well is still going ahead: it will pierce the annulus and allow the engineers to flush it with mud and close it definitively with more cement.
Both these features allow the animals to burrow deeply within sand, mud, and other substrates (even into wood and rock).
