A well, as the term is used in a conveyance, is an artificial excavation anderection in and upon land, which necessarily, from its nature and the mode of its use,includes and comprehends the substantial occupation and beneficial enjoyment of thewhole premises on which it is situated. Johnson v. Rayner, 6 Gray (Mass.) 197;Andrews v. Carman, 13 Blatchf. 307, 1 Fed. Cas. 8G8.