Performance Research And Optimal Design Of Pushing System Of Micro-resistivity Scanning Logging Tool

In recent years,with the increasing number of horizontal wells and highly deviated wells in my country's oilfields,the development of new logging tools has become an urgent problem in the logging industry.The development of logging is of great significance to ensure national energy security.This paper studies the problems of poor transmission performance and low logging accuracy of the current domestic micro-resistivity scanning logging tool,and designs a micro-resistivity scanning logging tool that can realize the transfer of each plate and greatly improve the transmission performance.There are few theoretical studies on logging tools in China.In this paper,the matrix method and the complex vector method are used to study the kinematics models of the plate pushing mechanism of the micro-resistivity scanning logging tool when the plate is opened and the working state is against the well wall.On the basis of kinematics analysis to solve the acceleration of each component,a dynamic static analysis of each component is carried out.After establishing the digital prototype of the plate pushing mechanism in the 3D design software Solidworks,the motion simulation is performed based on the virtual prototype technology.The Adams post-processing module obtains the regular curve of the displacement,velocity and acceleration of each component with time,as well as the The force condition assisted in analyzing the movement law of the plate pushing mechanism.It provides a basis for optimizing the design of logging tool structure and improving performance.At present,most of the force transmission mechanism of the logging tool pushing system in our country is a linkage mechanism,the main disadvantage is that the force transmission effect is poor and the dynamic load is large.In this paper,a push arm with an involute cam is designed.The pressure angle is always zero during the working process,which effectively solves the problems of poor force transmission of the micro-resistivity scanning logging tool and pressure failure of the sealing ring.Research shows that the main force rod with involute cam can well improve the force characteristics of the ejector rod and reduce the vibration of the logging tool due to its own structure.So that the micro-resistivity scanning logging tool has stronger adaptability to complex working conditions and higher stability.