me too, i have to claim 20 btd, someone can help?
No... because there is NOTHING TO CLAIM! 
Did you read ANY of this thread before posting? Bitcoin Diamond... DOES NOT CURRENTLY EXIST
Even according to their "roadmap":
Quote
Late in Dec
Mainnet update
2018 Q2
Finish main chain encryption
2019 Q1
Building BCD application ecology
Begin with 2020
Better bitcoin
Mainnet update
2018 Q2
Finish main chain encryption
2019 Q1
Building BCD application ecology
Begin with 2020
Better bitcoin
LATE in december... they hope to have a mainnet... currently, they have NOTHING... there is no publicly visible code, no wallets, no mainnet, no mining, no testnet.... N.O.T.H.I.N.G.
refer:
http://cryptocurrencyfacts.com/2017/11/24/bitcoin-diamond-explained/
https://medium.com/@btcblooddiamond/bitcoin-diamond-is-a-scam-of-epic-proportions-7d7908c43c22
tl;dr - You cannot claim Bitcoin Diamond at this time.