连续油管

现场失效研究解读高强度连续油管氢脆

这项研究强调了评估井况以及工作流体与连续油管材料的兼容性的迫切需要，以延长连续油管的使用寿命。

高压酸暴露室。
图1'高压酸暴露室。
资料来源：SPE 218327。

最近的报告强调了在酸性环境中使用盐酸 (HCl) 导致高强度淬火回火 (Q&T) 连续油管 (CT) 发生氢脆的情况。 HCl 酸处理会使 CT 表面遭受严重腐蚀，地层流体中的硫化氢 (H 2 S) 或化学反应通常会加剧腐蚀。帮助 CT 行业识别管报废时的损坏形态并重新评估 CT 牌号选择和化学品对于避免代价高昂且危险的 CT 故障至关重要。为了实现这一目标，我们对不同操作环境和地点的现场故障进行了总结评估。

氢脆：失效案例研究和模式

CT 现场故障可能会对环境和现场造成灾难性影响。

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Coiled tubing

Study of Field Failures Decodes Hydrogen Embrittlement in High-Strength Coiled Tubing

This study emphasizes the vital need to evaluate well conditions and working-fluid compatibility with coiled tubing materials to prolong coiled tubing operational life.

High-pressure sour exposure chamber.
Fig. 1—High-pressure sour exposure chamber.
Source: SPE 218327.

Recent reports have highlighted hydrogen embrittlement of high-strength, quench-and-temper (Q&T) coiled tubing (CT) resulting from hydrochloric (HCl) acid usage in sour environments. HCl acid treatments expose CT surfaces to aggressive corrosion, often exacerbated by hydrogen sulfide (H2S) from formation fluids or as a chemical reaction. Helping the CT industry recognize the morphologies of damage when the tube is retired and re-evaluating CT grade selection and chemicals are vital for averting costly and dangerous CT failures. To achieve this goal, a summary of field failures was evaluated from diverse operational environments and locations.

Hydrogen Embrittlement: Failure Case Studies and Modes

CT field failures can have catastrophic effects on the environment and in the field.

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