Abstract

Reliability Analysis of Super 13Cr Tubing in Ultra-Deep Gas Well

Highlights

  • The fracture failure of pipe string is one of the main forms of pipe string failure in oil and gas wells

  • Analysis and calculation, it was found that the main cause of cracking of super 13Cr tubing in this well is the decrease of vibration natural frequency caused by excessive fluid velocity in pipe and too long span of pipe string

  • The existing literature focuses on the fracture failure of oil and gas well string, which is generally attributed to the vibration failure of pipe string [3] or corrosion cracking [4]

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Summary

Introduction

The fracture failure of pipe string is one of the main forms of pipe string failure in oil and gas wells. The existing literature focuses on the fracture failure of oil and gas well string, which is generally attributed to the vibration failure of pipe string [3] or corrosion cracking [4]. Combined with the field working conditions and related parameters, the vibration mechanism and corrosion mechanism of pipe string fracture are studied, and the causes of fracture on the outer surface of the well string are discussed

Case Description
Fracture Morphology Analysis
Detection and Analysis of Chemical Properties of Pipe String
Establishment and Analysis of Theoretical Model of Oil Pipe string Vibration
Study on Failure in Corrosion Environment
Findings
Conclusions and Recommendations

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