Application Of Self-excited Oscillating Percussion Tool In Xinjiang Oilfield

The drilling process occupies a large amount of time and capital investment in the development of oil and gas resources,especially in the context of the downturn of the world oil industry,research and development of new methods and technologies to improve the rock-breaking efficiency of deep wells,and improve the drilling efficiency of China's oil and gas resources.And the competitiveness of Chinese oil companies in the international drilling market is of great significance.The self-oscillating cyclotron speed-increasing technology combines the dual advantages of impact drilling and pulse jet technology to enhance the hard rock crushing efficiency while enhancing the bottom hole purification.The supporting tools have the characteristics of simple structure,long life and stable performance.The area has achieved a better speed-up effect.However,since different regions have different geological conditions and working conditions,the self-oscillating cyclotron technology needs to be optimized before it can be used in a specific area,in order to achieve the best use effect.This paper takes the Xinjiang Oilfield as the target area,from "Applicability Analysis of Self-excited Oscillation Impact Technology in Xinjiang Oilfield","Optimization Design of Self-excited Oscillating Percussion Tools Structure","Optimized Design of Supporting Drilling Process Parameters" and "Field Test",etc.In four aspects,the combination of theoretical analysis and numerical simulation was used to study the application of self-excited oscillating percussion tools in Xinjiang oilfield.The results show that the self-excited oscillating percussion tool can generate dynamic and static load impact on the rock at the bottom of the well,reduce the fracture strength of the rock at the bottom of the well and strengthen the tensile failure of the rock.The optimal structure of different size tools exists under the optimal structural parameters.The tool can generate greater hydraulic pulsation and mechanical impact;the lower end of the tool oscillating cavity is a wearable part,which is streamlined,processed with cemented carbide material and then treated with carbonitriding to make the tool resistant.The wear capacity is further improved;the drilling pressure and displacement are two important factors that affect the use of the tool.The impact pressure generated by the drilling pressure determines the proportion of the rock at the bottom of the well.The displacement determines the hydraulic pulse and mechanical impact generated by the tool.Amplitude.The application results of 12 wells in the four well areas show that the tool speeding effect is significant,the wear is low,and it has good adaptability to different formations and drill bits.In this paper,the design and optimization methods of self-excited oscillating percussion tools and the design methods of using parameters are studied systematically,which provides theoretical basis and guidance for further in-depth research and development.