... hole equipment:Sensor, Frequency electrical submersible motor, motor saver, gas-liquid separator, multi stages centrifugal pump, check valve, relief valve, ... , tubing. Surface equipment: CBM dedicated wellhead, cable junction box, storage tank, smart control unit, A frequency control unit, B water quality ... is adjustable in a very wide range from 0.2 m3- 200 m3 according to various wells. 2-2-7. ESP ...