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Coiled Tubing in Sour Environments - Theory and Practice

机译:酸性环境下的连续油管-理论与实践

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Carbon steel Coiled Tubing strings have been used in sour wellbore environments for many years. The use of Coiled Tubing in sour service has increased by job number, job complexity, pipe size and the stresses to which the pipe is subjected. A number of papers have been written on the steel chemistry and low cycle fatigue behaviour. These have been based on both theoretical and laboratory work. Great progress has been made in understanding the chemical and physical interaction of Coiled Tubing and hydrogen sulfide but little information is available from “real world” situations where the pipe has been worked in a variety of job types (acidising, gas lifting, drilling, etc) and where a large number of other factors may come into play (injector damage, well stimulation chemicals, sour inhibitor application techniques, erosion of inhibitors, CO2, high chloride water production, etc). This paper will discuss the application of a Coiled Tubing technical specification (based on theoretical and laboratory work) in the operational world. Comparisons will be made between theoretical expectation and practical observation for 70 and 80 grade Coiled Tubing with regard to low cycle fatigue, pipe life and damage in sour environments.
机译:碳钢连续油管弦已在酸性井筒环境中使用了很多年。在酸性作业中使用盘管的工作数量,工作复杂性,管道尺寸和管道所承受的压力都增加了。关于钢化学和低周疲劳行为的许多论文已经发表。这些都是基于理论和实验室工作。在理解连续油管和硫化氢的化学和物理相互作用方面已取得了巨大进展,但是从“现实世界”情况中获得的信息很少,在这种情况下,管道已在多种工作类型(酸化,提气,钻探等)下工作。 )以及其他许多因素可能起作用的地方(喷油器损坏,增产井化学物质,酸味抑制剂应用技术,抑制剂侵蚀,二氧化碳,高氯化物水的产生等)。本文将讨论连续油管技术规范(基于理论和实验室工作)在实际操作中的应用。对于70和80级的连续油管,在低周疲劳,管道寿命和在酸性环境中的损坏方面,将在理论预期和实际观察之间进行比较。

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