Right play or not?

PokerStars No-Limit Hold'em, $1.00 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

SB ($58.85)
BB ($94)
UTG ($182.95)
MP ($103.30)
CO ($27.50)
Hero ($120.60)

Preflop: Hero is Button with Khttp://www.flopturnriver.com/phpBB2/...es/diamond.gif, Khttp://www.flopturnriver.com/phpBB2/...iles/spade.gif.
UTG calls $1, 1 fold, CO calls $1, Hero raises to $5, SB calls $4.50, 1 fold, UTG calls $4, CO calls $4.

Flop: ($21) 7http://www.flopturnriver.com/phpBB2/...iles/spade.gif, Thttp://www.flopturnriver.com/phpBB2/...miles/club.gif, 2http://www.flopturnriver.com/phpBB2/...iles/spade.gif (4 players)
SB checks, UTG checks, CO checks, Hero bets $20, SB folds, UTG raises to $50, CO calls $22.50 (All-In), Hero raises to $115.6, UTG calls $65.60.

Turn: ($274.70) Ahttp://www.flopturnriver.com/phpBB2/...miles/club.gif (3 players, 1 all-in)

River: ($274.70) 2http://www.flopturnriver.com/phpBB2/...miles/club.gif (3 players, 1 all-in)

Final Pot: $274

Limp-call, check-raise substantial flop bet with 4 players in the pot = a fold for KK most of the time here...it being 6-max and if you had a read that he would do this with somethin you beat then it's fine.