Patent ID: 8313316

Claim:
A compressor system for transporting a medium in an offshore area, comprising: a seawater-proof housing having at least one entry opening for the medium, and at least one discharge opening for the medium; a compressor arranged in the housing and having an inlet side connected to the entry opening and an outlet side connected to the discharge opening; and an electric motor arranged in the housing and including a stator packet coolable via an inner side of the housing and a rotor packet for driving the compressor, said stator packet being spaced at a distance from the inner side of the housing and having cooling passages extending axially inside the stator packet, said stator packet forming with at least one confronting part of the housing inner side a separate closed annular cooling chamber arranged at an inner peripheral area of the housing and fluidly communicating with both ends of the cooling passages to thereby enable circulation of a coolant in a closed cooling circuit, wherein the coolant is oil, wherein the cooling passages are spaced from one another to define one cooling passage arranged at an inner diameter of the stator packet and another cooling passage arranged at an outer diameter of the stator packet; and wherein the rotor packet is located externally of the annular cooling chamber.