Journal of Failure Analysis and Prevention

, Volume 16, Issue 3, pp 384–390 | Cite as

Optimization Analysis on the Effects of Slip Insert Design on Drill Pipe Damage

  • Liping Tang
  • Xiaohua Zhu
  • Jinhe Li
  • Changshuai Shi
Technical Article---Peer-Reviewed
  • 127 Downloads

Abstract

New oil and gas reservoir discoveries in deep conditions have become common. Constructing wells in these deep environments has challenged the petroleum industry to develop new technologies for reaching extended depths while focusing on limitations of the pipes due to excessive damage from slips. This paper addresses a serious problem pertinent to the design of slip insert. Firstly, a series of numerical simulation models are established to analyze the effects of slip insert design on drill pipe damage under a pipe weight of 200 tons, where the drill pipe is 5 in. which is subjected to the American Petroleum Institute. Secondly, the models are conducted to find the optimized parameters of the slip insert by comparing the maximum stress of different combinations. Finally, laboratory experiment is carried out to verify the simulation results. For the drill pipe and slip system selected, an optimized slip insert with a front-rake angle of 75°, a back-rake angle of 30°, a chamfer of 0.2 mm, and a tooth height of 2 mm is obtained. This research provides a method for designing the slip insert.

Keywords

Drill pipe Slip Rake angle Maximum stress Plastic deformation 

Notes

Acknowledgment

This research is supported by the Scientific Research Starting Project of SWPU (No. 2015QHZ011), National Natural Science Foundation of China (Grant No. 51222406), New Century Excellent Talents in University of China (NCET-12-1061), and Youth Scientific Research Innovation Team Project of Sichuan Province (2014TD0025).

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Copyright information

© ASM International 2016

Authors and Affiliations

  • Liping Tang
    • 1
  • Xiaohua Zhu
    • 1
  • Jinhe Li
    • 2
  • Changshuai Shi
    • 1
  1. 1.Department of Mechanical EngineeringSouthwest Petroleum UniversityChengduChina
  2. 2.Research Institute of Drilling and Production Engineering TechnologyChuanqing Drilling Engineering Co., LtdGuanghanChina

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