过套管电阻率测井仪推靠机构优化设计

摘要

Cased-hole resistivity logging tool is necessary for the cased wells,and the key struc-ture,pushing device,largely affects its use performance.In order to increase the maximum longing diameter and decrease the needed maximum force of the cased-hole resistivity logging tool,it is important to optimize its pushing device.Based on the establishment of the dynamic model of cased-hole resistivity logging tool,maximum longing diameter and needed maximum force have been set as the optimization design goals,and the longest length of the unfolded springs,thickness of the springs,distance between the two hinge joints in active pushing arm and length of driving arm have been regarded as the design variables.Then an optimization design model has been given and solved by complex method.Finally,the optimization model has been applied in the optimiza-tion design of a logging tool pushing device,and the optimized results have been analyzed to verify the optimization effect.Research results provide a theoretical basis for the research of cased-hole resistivity logging tool.%过套管电阻率测井仪是套管井必需的测井仪器，其关键结构推靠机构在很大程度上影响其使用性能。为增大过套管电阻率测井仪的最大测井直径，并控制所需最大驱动力，需要对其推靠机构进行优化。在建立过套管电阻率测井仪推靠机构力学模型的基础上，以测井直径和所需最大驱动力作为优化设计目标，将推靠机构板弹簧最大展开长度、簧片厚度、主动推靠臂两铰接点间距及驱动臂长作为设计变量，提出优化设计数学模型，并利用复合形法求解。应用该优化模型对某测井仪推靠机构进行优化设计，并对优化结果进行对比分析，为过套管电阻率测井仪器的研制提供了理论参考。