Design Of Oil Well Temperature Measurement System Based On Optical Fiber Sensor

In this paper, the intelligent system of temperature measurement and data acquisition of oil well by using optical fiber sensor are studied. The working principle, hardware and software of the system are discussed in detail.The main function of the intelligent system is measured by the level of the oil temperature, to ascertain the injection profile and production of fracturing, so to complete the two parameters of the test in practice: one is the depth coordinate value of wells; two is the depth of wells when the value of the coordinates of the corresponding temperature value.The depth coordinates are detected by magnetic locator to the tubing coupling pulse signal, and then amplified and shaped by the cable to the P89C51RD+ microprocessor to the interrupt I entrance, and call the corresponding interrupt service routines for processing.The temperature value type temperature sensor to measure absorbed by the semiconductor, representing the temperature value of the voltage signal by the V/F converter, and then to send the form to the frequency of the 8253 timer 1, and the temperature of the corresponding processing subroutine for processing and display and print.In addition, the system also includes a depth monitoring subsystem, which is used to monitor the downhole location of the downhole instrument. The synchronous motor is mainly composed of a well head. Photoelectric encoder, 8751 microprocessor, counter 8253 and display circuit.The system adopts the semiconductor suction type optical fiber temperature sensor and V/F conversion technology, greatly improves the anti-interference ability of the system, can collect the temperature parameters of downhole temperature and depth coordinates, so as to accurately ascertain the effect of underground construction.