Finite Element analysis of drill pipe-slip system

Liping Tang, Baolin Guo, Marcin Kapitaniak, Vahid Vaziri, Marian Wiercigroch* (Corresponding Author)

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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Abstract

As an important tool for tripping of a drill-string, a drill-pipe (DP)-slip system directly affects both the service life of a DP and the target depth it can reach. In this paper, a finite element (FE) model developed in ABAQUS is used to simulate interactions within a DP-slip system. For this model, materials, geometric dimensions, loads, and boundary conditions were determined for an actual DP-slip system. A special attention was paid on the stress field of the slip insert and the DP focusing on the geometric parameter optimization of the slip insert with regards to the stress distribution, wherein factors like a longitudinal groove number in slip insert, a number of slip inserts, and a number of row spacing of slip inserts are considered. Numerical results show that the circumferential stress and axial distributions change for both the DP and slip inserts, and that the stresses of the inner surfaces are higher than that of the outer surfaces. Effects of geometric parameters of the slip insert on the stress distributions of both DP and slip insert are studied and the corresponding optimized values are obtained, which can be used for the designing of slip insert.
Original languageEnglish
Article number111163
Number of pages13
JournalJournal of Petroleum Science and Engineering
Volume220
Issue numberPart B
Early online date17 Nov 2022
DOIs
Publication statusPublished - 1 Jan 2023

Bibliographical note

Acknowledgments
This research is supported by the National Natural Science Foundation of China (No. 51904262), the China Postdoctoral Science Foundation (No. 43XB3793XB), and the State Scholarship Fund of the China Scholarship Council (No. 201808515055).

Keywords

  • Drill-pipe
  • slip insert
  • friction
  • stress distribution
  • Finite Element analysis

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