六臂井径测井仪推靠系统运动学分析及仿真

Kinematics Analysis and Simulation of the Pushing System of Six-Arm Caliper Logging Tool

推靠系统是井径测井仪实现井筒直径大小测量的主要组成部分,其运动的精确性与测井数据的准确性紧密相关。为进一步提高推靠系统的传动性能,分析了其自由度,得出六臂井径测井仪推靠系统在打开、测量两种运动状态都有确定的运动。采用复数矢量法分别建立了推靠系统打开、测量两种数学模型,并对推靠系统中推靠臂进行了结构参数化设计及凸轮运动特性分析,获得了两种运动状态下输出运动与输入运动的位置、速度及加速度之间的关系。其次,基于Adams仿真软件辅助分析和验证了其系统的运动规律,为进行推靠系统动力学分析及结构参数优化奠定了理论基础。

The the Push-back System is the main component of the well diameter measuring instrument to achieve the diameter measurement of the wellbore.The accuracy of the motion is closely related to the accuracy of the logging data.In order to further improve the transmission performance of the Push-back system,the degree of freedom is analyzed,and the pushing system of six-arm caliper tool is determined to have certain movements in both the open and the measured motion states.Two mathematical models of opening and measuring of the pushing system are established by the complex vector method,and the structural parameterized design and cam motion characteristics of the pushing arm in the pushing system are analyzed.The relationship between the output motion and the position,velocity and acceleration of the input motion in the two motion states is obtained.Secondly,based on Adams simulation software,the motion law of the system is analyzed and verified,which lays a theoretical foundation for the dynamic analysis of the push system and the optimization of structural parameters.