... Smart production equipment of Coal-bed methane 1. Smart production equipment of Coal-bed methane2-1. The main structure Down hole equipment:Sensor, ... valve, coil lead, cable protector, submersible cable, tubing. Surface equipment: CBM dedicated wellhead, cable junction box, storage tank, smart ... control unit, A frequency control unit, B water quality control unit. 2-2. special features 2-2 ...