Development of PLC-based EWS for Anti-jamming in Thickened Oil Production
Kun Xiao · Huagong zidonghua ji yibiao · 2011
Considering the oilwell blockage in thickened oil production,and basing on the technology of watering the thickened oil via hollow rod and the water injection rate to judge oilwell blockage,a PLC and SCM-based EWS(Early Warning System) was presented,in which,the circuit which broadening the pulse signal of flow meter was designed and the general I/O was employed to implement a high-speed pulse counting;and by comparing the monitored signal with the setting threshold,the PLC can judge running state of production;and the SCM-based GSM can send warning information;and the warning model of sound-light and GSM was dynamic integrated.