A direct-drive refrigerant screw compressor , comprising: a housing ; a compression chamber in the housing ; a pair of rotors , each rotor of the pair of rotors being rotationally disposed in the compression chamber and including an outer surface with a screw-geared profile; a fluid being disposed in the compression chamber , the fluid consisting of a working fluid for providing lubrication to each rotor, wherein the working fluid is refrigerant; and a first port extending through the housing and configured for directing the fluid toward the compression chamber ; wherein when the compressor is activated, each rotor rotates and the fluid is distributed about each rotor to lubricate each rotor; and for each rotor, the compressor includes a plurality of bearing packs disposed within a respective plurality of bearing chambers ; characterized in that : the first port is fluidly connected to a passage in one rotor of the pair of rotors that directs the fluid to the compression chamber ; the passage extends between an axial aft port in the one rotor and the outer surface of the one rotor, wherein the axial aft port is in one of the plurality of bearing chambers ; and the passage includes an axial segment forming a blind hole and a radial segment fluidly connected between the axial segment and a surface port on the outer surface of the one rotor, whereby the compressor is configured to distribute fluid around the outer surface of the plurality of rotors . a housing ; a compression chamber in the housing ; a pair of rotors , each rotor of the pair of rotors being rotationally disposed in the compression chamber and including an outer surface with a screw-geared profile; a fluid being disposed in the compression chamber , the fluid consisting of a working fluid for providing lubrication to each rotor, wherein the working fluid is refrigerant; and a first port extending through the housing and configured for directing the fluid toward the compression chamber ; wherein when the compressor is activated, each rotor rotates and the fluid is distributed about each rotor to lubricate each rotor; and for each rotor, the compressor includes a plurality of bearing packs disposed within a respective plurality of bearing chambers ; characterized in that : the first port is fluidly connected to a passage in one rotor of the pair of rotors that directs the fluid to the compression chamber ; the passage extends between an axial aft port in the one rotor and the outer surface of the one rotor, wherein the axial aft port is in one of the plurality of bearing chambers ; and the passage includes an axial segment forming a blind hole and a radial segment fluidly connected between the axial segment and a surface port on the outer surface of the one rotor, whereby the compressor is configured to distribute fluid around the outer surface of the plurality of rotors . the first port is fluidly connected to a passage in one rotor of the pair of rotors that directs the fluid to the compression chamber ; the passage extends between an axial aft port in the one rotor and the outer surface of the one rotor, wherein the axial aft port is in one of the plurality of bearing chambers ; and the passage includes an axial segment forming a blind hole and a radial segment fluidly connected between the axial segment and a surface port on the outer surface of the one rotor, whereby the compressor is configured to distribute fluid around the outer surface of the plurality of rotors . <EOS>