Research On Working Level Measurement System Of Oil Well

The oil pump must guarantee a certain submergence in the screw pump wells, in order to achieve better results. When the working level down to the pump setting depth, the pump efficiency is reduced, is serious when occurs burned the stator phenomenon, the problem occurs lie well. In addition, some wells with water pumps to be under the control of working level to increase by adding water. Therefore the measure working level value, control the fluid position altitude, to the reasonable development oil field, the enhancement extraction rate has the important meaning.Traditional working level measurement by the manual operation, artificial signal interpretation. Collation of the data complicated calculation, error, low degree of automation and low efficiency. This article carries on the analysis to the present domestic oil field use's working level measurement system existence's shortcoming, in this based on the design of the MSP430 microcontroller as the core of the closed-loop control system. The overall design scheme is proposed, the use of mechanical devices as subsonic aeroelastic source. Hardware, including power supply circuit, motor reversing control circuit, the signal input and filter circuit, CPU and memory circuits, touch screen and LCD modules as well as RS232 TTL switch circuit and so on, mainly realizes the sound wave launch, the data acquisition, the data processing and storage, the contach surface demonstration and the long-distance communication and so on. Complete the process in accordance with the preparation of design ideas, to achieve sampling, digital filtering, fast Fourier spectral analysis, calculating the working level value, interactive interface and closed-loop control. Signal processing aspects of digital filtering, selects the frequency range analysis method, the use of fast Fourier transform spectral analysis. With fluid level location and the acoustic echo of the propagation velocity in the tubing calculated level values. Estimate the working level values, then select the reasonable working system.The system consists of singlechip replaces the traditional analog filters and micro-controllers, long-term preservation of measuring data, programming easy and flexible parameter settings, the use of digital signal processing. Therefore, the system is reliable and improves the automation and accuracy. System uses closed-loop control, can reflect abnormal working level and pump system for a reasonable choice in time. Realize intelligent control, improve extraction rate and the purpose of reducing the problem lie well.