No wait.
The tunnel drill won't work as the water will creep in even if you seal it from the outside, it will still depend on the powerline unless it is nuclear power or something like that. XD
however. it can be used for...
excavation into deeper depths, to measure out the abundance of certain minerals.
of which then, once verified,
the bucket-lid drill, can begin extracting itself from the surface.
and assuming the tunnel drill works much faster in loosening up the soil beneath the surface levels,
it can traverse undergound however ways in preparation of the bucket-lid drilling.
so basically, the bucket-lid drill just needs to scoop, and occasionally need the embedded drill to crack and hard surfaces.
possible? i think so.
here is my previous drawing from long ago on the bucket drill, i just modified it.
so it's just re-usage of my existing ideas in novel ways.
of course, if the fucker steve is trying to steal it, you know what that means.
it would have had a foresight to all these ideas.
it's lying, so if it tries again, solidify further its intent to harm. no matter what.
no dignity, honor, nothing. solely intending to destroy my life by being a parasite.