1.Smart Drainage Equipment For CBM 2.Steady-going, Long life-span 3.Highly ... dedicated wellhead, cable junction box, water tank, smart control unit, A frequency control unit, B water quality control unit. 2. special features (1) ESP (electrical submersible ... pump check & workover. It’s the best system for deviated & cluster well, especially for multi-lateral horizontal well. It can be installed ...