全旋转推靠式自动垂直钻井工具悬架机构设计

Design of Suspension Mechanism for Full Rotation Push-back Automatic Vertical Drilling Tool

自动垂直钻井工具的振动会使得工具的测量精度大大降低,工具本身也易产生疲劳强度降低、联结失效,使工具寿命降低、影响钻井的精度,并最终会影响井身质量。设计了一种用于全旋转推靠式自动垂直钻井工具的全密封悬架机构,其主要作用是连接稳定平台和外壳。同时采用动力吸振的原理设计减震机构,降低机构振幅,有效抑制振动向稳定平台传递,降低电子仓电子元件所受到的振动,提高传感器的测量精度和控制系统的控制精度,进而提高井身垂直度。所设计的悬架机构与传统的悬架机构相比较拥有更好的减振效果,并且消除了工具零件在装配时所存在的轴向间隙。采用ANSYS/Workbench对工具控制轴的强度校核结果表明:该机构控制轴所受到的轴向最大应力为140.41 MPa,满足强度要求。

The vibration of the automatic vertical drilling tool will greatly reduce the measuring accuracy of the tool,and the tool itself is also prone to reduce fatigue strength and connection failure,which will reduce the tool life,affect the drilling accuracy,and ultimately affect the quality of the well bore.In this paper,a fully sealed suspension mechanism for the fully rotating push-back automatic vertical drilling tool is designed.Its main function is to connect the stable platform and the shell.At the same time,the principle of dynamic vibration absorption is adopted to design the damping mechanism,reduce the amplitude of the mechanism,effectively inhibit the transmission of vibration to the stable platform,reduce the vibration of the electronic components of the electronic warehouse,improve the measurement accuracy of the sensor and the control accuracy of the control system,and then improve the verticality of the shaft.Compared with the traditional suspension mechanism,the designed suspension mechanism has better damping effect and eliminates the axial clearance of tool parts during assembly.The strength check results of the tool control shaft using ANSYS/Workbench show that the maximum axial stress of the control shaft of the mechanism is 140.41 MPa,which meets the strength requirements.