Those drills do exist, and they have been used in a number of mine rescue attempts. They take days/weeks/months to reach the desired depth and size of hole, dep

Those drills do exist, and they have been used in a number of mine rescue attempts. They take days/weeks/months to reach the desired depth and size of hole, depending on the type and stability of the rock being drilled through. That's assuming the surface is conducive to drilling - any preparation there (leveling the ground, building access roads, etc) will take even more time.