Research On The Four Channels Oil-Well Down-hole Test Gauge

Based on the theory of the stored testing and measuring system (STMS), the paperdiscussed the design of the STMS, the complex sampling strategy, the scale and calibration ofthe sensor and the circuit in the static and dynamic condition. Researched about the wholescheme and design theory of the measuring technology of dynamic parameters in thedown-hole atrocious circumstances. Analyzed the design of the hardware circuit of the FourChannels Oil-Well Down-hole Test Gauge, which applied to the well logging successfullysuch as Daqing, Liaohe and Zhongyuan oil field.This paper mainly studied the four problems as follows:Firstly, it developed the design scheme of the measuring technology of dynamicparameters in the oil-well which is based on the analysis of the well logging and perforationtechnology, especially the characteristics of the signal which is measured. Then it introducedthe mechanical structure and the circuit of the test gauge.Secondly, researched about the theory of the design of the system, the sampling strategy,the state, the power management and the trigger circuit, put forward the specification of theFour Channels Oil-Well Down-hole Test Gauge, and introduced the design of the circuit, thesimulation of the sequential logic and the software.Thirdly, scaled and calibrated the sensor and the circuit in the static and dynamiccondition, especially the calibration using in the drop hammer and the simulative oil-wellexperimental equipment are studied in detail.Lastly, solved the problem that caused by the frequency conversion when sampling, andthe scientific and reliable sampling strategy is developed. Meanwhile, the system solved theusing problem of the over-temperature of the integrated circuit that makes the test gaugepracticality applied in oil-well.