Research On Multi-parameter Monitoring System For Underground Oil Pump Shaft

In recent years,as human demand for energy has become larger and larger,it is necessary to break through the technology produced by oil companies,and improving oil production equipment is one of the key technical fields of the country.In the process of oil production,it is necessary to keep abreast of the production dynamics in the oil well,combined with various parameter data for analysis and timely control.Dynamic changes in the parameters of the well,taking appropriate measures and reasonable regulation to achieve the best mining results.In view of the current status of China's oil exploitation,it is necessary to develop a multi-parameter monitoring system device for submersible electric pump wells suitable for China's national conditions,gradually replace imported equipment,reduce production costs,monitor the normal operation of system equipment in real time,adjust process parameters,and improve oil recovery.Efficiency,and ultimately intelligent mining.This project successfully developed a submersible electric pump well underground multi-parameter monitoring system equipment,formed a complete set of chassis,completed the production of a complete system prototype,the system equipment mainly for the oil well inlet temperature,motor winding temperature,Parameter monitoring of inlet pressure,outlet pressure,X-axis acceleration,Y-axis acceleration,Z-axis acceleration and leakage current enables comprehensive application of acquisition,monitoring,transmission,processing'analysis,display and storage of the entire system.The downhole system has re-developed the down-circuit circuit of the downhole power system,and has developed the most suitable signal transmission scheme,the acquisition and signal conditioning circuits of various parameter sensors,the measurement of the reference current,and the calibration scheme for each set of reference currents.The downhole timing switching system is realized,and the downhole frequency converter is developed and optimized to make the frequency conversion decompression circuit operate reliably in the strong noise grid.Due to the increase of measurement parameters,the ground system replaces the smart panel display module with a TFT-LCD liquid crystal display,and uses the STM32 series chip to store data,alarm,wireless transmission,communication mode between STM32 chip and 51 single chip microcomputer.Communication protocol,at the same time write the running part of the display part,51 single-chip peripheral circuit development,divided into analog-to-digital conversion circuit,RS232 interface circuit,clock circuit implementation,further optimize the performance and structure of the ground filter.Combined with the large amount of parameter history data monitored by the system,the well test analysis method is proposed for analysis,which can reflect the dynamic information of the reservoir in the oil well,evaluate the dynamics of the reservoir and the formation parameters,adopt different measures to control,and effectively improve the mining.Yield,reducing unnecessary work.The joint test between the ground and the downhole part solves the problem of the dual current signal and demonstrates the necessity of measuring and calibrating the reference current.At the same time,in the high temperature and high pressure environment,the downhole power module,each sensor and the timing switching module can work normally,the acquisition and transmission time is fast,the parameter data accurately reflects the downhole operation status,and the whole system can operate reliably,all of which achieve real-time monitoring.The purpose and requirements of the development,and finally a complete set of prototypes of the submersible electric pump well underground multi-parameter monitoring system.