Purpose

This paper aims to analyze a failure case of a P110 tube in a CO₂ flooding well.

Design/methodology/approach

The chemical composition, microstructure and mechanical properties of the failed P110 tubing steel were tested, and met the API Spec 5CT standard. The fractures were investigated by scanning electron microscopy and energy dispersive spectroscopy.

Findings

Fracture was induced by stress corrosion cracking (SCC) and that the stress concentration caused by the mechanical damage played an important role in the failure. The failure case is a SCC failure affected by mechanical damage and galvanic corrosion.

Originality/value

The effect of the infiltration of groundwater was studied in the failure case. The stress concentration caused by the mechanical damage played an important role in the failure.

中文翻译：

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P110钢管在二氧化碳驱油井中的失效案例

目的

本文旨在分析P110管在CO ₂驱井中的失效情况。

设计/方法/方法

测试了失效的P110钢管的化学成分，微观结构和力学性能，并符合API Spec 5CT标准。通过扫描电子显微镜和能量色散光谱研究骨折。

发现

应力腐蚀开裂（SCC）引起断裂，并且由机械损伤引起的应力集中在失效中起重要作用。失效案例是受机械损坏和电腐蚀影响的SCC失效。

创意/价值

在失效情况下研究了地下水入渗的影响。机械损伤引起的应力集中在失效中起重要作用。