First time posting here so apologies if the question im asking here is obvious.

The frame of reference for the below hand is that we are deep in the money (760 odd got paid), currently standing in roughly 20th out of 66 that remain.

No Limit Hold'em Tournament T4,500/T9,000
Buy-in: $3.29+$3.40+$0.81 USD Hold'em No Limit
PokerStars
8 players
Formatted by pokercopilot.com: Poker HUD for Mac and Windows

Stacks:
UTG - UTG (T195,031)
UTG+1 - UTG+1 (T284,760)
MP - MP (T178,939)
MP2 - MP2 (T211,962)
CO - CO (T231,496)
BTN - Hero (T533,377)
SB - SB (T299,810)
BB - BB (T693,373)

Preflop: (T24,700, 8 players) Hero is BTN with Q T
4 folds, CO raises to T18,000, Hero calls T18,000, 1 fold, BB calls T9,000

I am completely fine with my preflop action here, don't see what else I would do in this spot.

Flop: 4 7 T (T69,700, 3 players)
BB checks, CO bets T36,569, Hero raises to T126,000, BB raises to T673,973 (all-in), 1 fold

Here I am unsure as to whether or not my line is correct, should I have flatted the Cbet and when the cold 4Bet gets put in I am left somewhat perplexed.

Results:

nh

If we are raising then we are bluffing if we fold to a reraise? Is top pair and flush draw a bluffing hand here?

the cbet for that size into two looks pretty strong and your raise looks even stronger.

You have good equity against any range, so as long as you don't fold it's fine. I'm mostly calling flop though.

Yeah you could have flatted instead of raising. I don't think it would have been a mistake. I think Villains shove makes sense since he wasn't blocking any of the flush draws, not sure I agree with it though since you could have some sets in your range. I like your call. You had the right price and tons of equity to do so. Crappy run out.

value / semi bluff in terms of raw equity we ahead of much of his range, even like AA. Can't fold to reraise imo