Abstract: In the production process of oil and gas Wells, due to the comprehensive influence of various factors such as geological environment, production stage and mineral composition, it is easy to form scale and blockage on the wellbore, which will affect production. The effectiveness of plugging removal methods and technological measures is directly determined by whether the downhole scale sample can be obtained. An intelligent downhole scaling system was designed and developed for the sampling of downhole scaling materials in gas wells with high sulfur content. The architecture and working principle of the intelligent downhole scaling device were introduced. The key mechanical structures and components of the scale remover, such as the circuit board damping structure, the scale remover claw, the scale basket device and the centralizing device, are discussed in detail. The architecture and control principle of electrical timing control system based on DSP are expounded, and the key parameters calculation process of PID control algorithm is emphatically illustrated. The results of indoor performance tests and well function tests show that the temperature and pressure resistance of the developed tool, as well as the automatic telescopic and synchronous control function of the scaling device are reliable, and the well entry and exit processes are smooth, which can provide equipment support for the accurate sampling of the scale in the gas well with high sulfur content. At the same time, the proposed design method and idea have certain reference significance to the research and development of other intelligent downhole tools.

Key words: high-sulfur gas well, downhole fouling getting, intelligent fouling-getting process, intelligent device, downhole tool