用于水平油井的测井仪器拖动器的设计

Design of downhole tractor for logging tools used in horizontal well

为解决水平油井内测井仪器送进问题,设计一种伸缩式拖动器.利用超越离合原理,使用三组蠕动单元实现拖动器连续行走,采用液压驱动方案,拖动器断电自动与井壁解锁.介绍拖动器的组成及工作原理,设计拖动器行走机构,给出液压控制回路原理图,利用pro/e和ADAMS建立包括液压阀及管路的拖动器虚拟样机,进行了运动仿真,验证了该拖动器的结构合理性和可行性.

In order to solve the problem of conveying logging tools from the surface into horizontal well,a stroke retract-type tractor is designed.In virtue of overrunning clutch principle and three types of inchworm unit,continuous movement of the tractor is realized.By adopting hydraulic powered scheme,the tractor automatically unlock with the well wall in the event of power failure.The structural composition and working principle of the tractor are introduced,the walking mechanism is designed,and the schematic diagram of hydraulic system is presented.A virtual prototype of the tractor including hydraulic valve and pipeline is built in Pro/e and ADAMS software.The motion simulation on it is conducted,which proves the feasibility and rationality of the tractor.