Oil Well Logging And Data Acquisition System

The petroleum industry is significant to the people's livelihood, oil well logging is an important part of petroleum production. Along with the advances of science and technology, more and more new techniques are applied to the development of oil well logging equipments, have improved the result of measurement a great progress not only in the accuracy but also in the effect.The well logging system is designed to detect oil, gas and sand ejecting situation, the work effect, the whole situation, the most important point under the well, the system uses characters overlapping circuit to overlap the data include temperature, pressure, depth and magic location data on the video signal which is produced by CCD camera under the well, show the situation like well wall, well hole, location of the tools, location of the destroyed pipe in real time.The well logging system is a whole system. Many kinds of techniques like analog circuit, digital circuit, hardware design, software program are involved: design temperature and pressure signal acquisition, converter, amplifier, filter circuit; depth signal jitter elimination circuit; horizontal and vertical synchronous department circuit by using LM1881; characters overlapping circuit by using uPD6450; use C8051F020 to deal with the data and control the characters overlapping; send the overlapped video to the monitor and the computer to display and save; communicate by USB between the system and the computer; design the software to display the data and set the parameters.