Abstract: The invention relates to an underwater station for pumping a well flow, comprising a separator for separating the well flow into liquid (oil/water) and gas, a pump assembly comprising a pump with a motor, and a compressor assembly comprising a compressor with a motor, as well as fluid carrying conduits between the separator and pump, and compressor, respectively. Separator, pump assembly, and compressor assembly are assembled into a compact unit with said three components arranged in a column structure, with pump assembly placed downmost, then separator, and with compressor assembly provided uppermost. The fluid carrying conduits are designed for connection (interface) in the bottom of said column structure.

Abstract: The invention relates to a pump unit comprising a liquid filled electric motor with a house and with a vertical driving shaft extending downwards, a pump comprising a pump house, and a pump portion which is connected with a driving shaft, and a chamber around said driving shaft, between the motor and the pump with a mechanical packing between motor and chamber. The pump unit is characterized by the fact that the motor house and the pump house are combined to a press shell which is closed to the ouside. The chamber has a pressure equalizing connection with a first place in the pump. The liquid filled motor house has a pressure equalizing connection with a second place in the said pump where the pressure is higher than at said first place.