Yes, REAMERS is a Scrabble word!

Letter values in Scrabble US: R 1, E 1, A 1, M 3, E 1, R 1, S 1.

Is it a valid word?

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

a squeezer with a conical ridged center that is used for squeezing juice from citrus fruit
a drill that is used to shape or enlarge holes

Also: juice reamer.