Yes, PIQUETS is a Scrabble word!

Letter values in Scrabble US: P 3, I 1, Q 10, U 1, E 1, T 1, S 1.

Is it a valid word?

PIQUETS is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

a card game for two players using a reduced pack of 32 cards
a form of military punishment used by the British in the late 17th century in which a soldier was forced to stand on one foot on a pointed stake