Here’s one for the trivia buffs. Do you know the name and depth of the world’s deepest oil well? Bonus points if you know what country it’s in!
Deepest by measured depth is “Z-44 Chayvo” at about 12,376 m in Russia (Sakhalin‑1), though that project later pushed ERD wells past about 15 km MD in 2017 — long enough for a coffee break halfway. If you mean true vertical depth instead of MD, which one do you want?