... main structureDown hole equipment:Sensor, Frequency electrical submersible motor, protector, gas-liquid separator, multi stages centrifugal pump, check valve, relief ... Surface equipment: CBM dedicated wellhead, cable junction box, water tank, smart control unit, A frequency control unit, B water ... <=4 mm solid particles, but can also separate 40% gas from fluid. (4)Guide impeller & shaft of centrifugal ...