Dane, Texas Speculator: Just dawned on me, CVX drilled OBO(e), and found it was bigger than the OBOe expected and a deeper (note), hence a BASSOON.
Nothing to do with shape, all per the arcane mind of Oilphant!!!
Just one of the entertaining tunes get played on this board. Brings to mind the nameless poster with the common longitude, JDZ and London, plays it all like a violin (Stradivarius).
Some other poster said Mensa puzzles and games . . .
Stay the Course, if you can tolerate the music