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Journal of Failure Analysis and Prevention

, Volume 17, Issue 4, pp 765–773 | Cite as

The Effect of the Rotary Steerable Spindle Structure Parameters on the Characteristics of Cantilever Bearing

  • Xiaodong Zhang
  • Qian Wu
  • Yi Zhang
Technical Article---Peer-Reviewed
  • 112 Downloads

Abstract

In point-the-bit rotary steerable drilling system, the internal and outer diameter of the spindles and the fillet radius of the shaft shoulder have a great influence on the life of the cantilever bearing. According to the stress bias condition of the spindle, the 3D model of the cantilever bearing was established. Simulation analysis was conducted by loading boundary condition of the spindle under bias force. Therefore, the relationship between the internal and outer diameter of the spindle, the fillet radius of the shaft shoulder and the mechanical properties of the cantilever bearing were obtained. The results show that when the outer diameter of the spindle is constant, the deformation, the equivalent stress and the contact stress of the cantilever bearing reduce gradually with the increasing of the internal diameter of the spindle. When the internal diameter of the spindle is greater than 72 mm, the deformation of the roller shows a great fluctuation with the increasing of the fillet radius of the shaft shoulder. The life of the cantilever bearing first increases and then decreases with the increasing of the internal diameter of the spindle under the different fillet radius of the shaft shoulder. When the internal diameter of the spindle is constant, the life of the cantilever bearing first increases and then decreases with the increasing of the fillet radius of the shaft shoulder. The life of the cantilever bearing decreases gradually with the increasing of the outer diameter of the spindle. According to the research results, the optimal combination of internal diameter of the spindle and fillet radius of the shaft shoulder, outer diameter of the spindle and fillet radius of the shaft shoulder was offered, which can provide basis for the design of the spindle system.

Keywords

Point-the-bit Rotary steerable Cantilever bearing Internal diameter of the spindle Outer diameter of the spindle Fillet radius of the shaft shoulder 

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Copyright information

© ASM International 2017

Authors and Affiliations

  1. 1.School of Mechanical EngineeringSouthwest Petroleum UniversityChengduChina

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