system
Given the following post, respond as if you're commenting on Reddit:
human
How far do you have to go beneath the ocean floor before the earth becomes dry again?

If you dig deep enough through the ocean floor, assuming no water backfills your hole, how far until you reach dry crust again? 

Edit: clarification - how far down does the ocean saturate the earths crust.
gpt
Based on OP's clarification, nobody has answered the question yet. All the answers so far basically state, "There's water in the crust everywhere, so you'll never find crust without some sort of water." That answers the title's question, but OP doesn't want to know where the crust is no longer wet. He or she appears to be asking where the ocean's influence ends downward from the ocean floor. Right?