（1）suitable for vertical well,inclined well and horizontal well 
（2）Capacity：2~300m³/d，setting depth of pump：500~2500m
（3）Crude oil ground viscosity：≤10000mPa·s(25°C)，Reservoir temperature≤120°C
（4）at intakes，gas content <50%
（5）sand content <5%，Max.particle size <=0.3mm