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Coiled Tubing in Sour Environments:Theory and Practice (1)

(2006-07-01 20:47:48)
Coiled Tubing in Sour Environments:Theory and Practice
含酸环境中的连续油管理论和实践
 
Carbon steel coiled tubing (CT) strings have been used in sour wellbore environments for many years. The use of CT 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 behavior. These papers have been based on both theoretical and laboratory work.
 
碳钢连续油管运用于含酸井筒环境已有多年历史。随着作业井次、作业复杂性、油管尺寸和油管承受压力的增加,连续油管在含酸环境中的使用越来越多。在理论和实验工作的基础上,已有大量文献涉及到碳钢的化学成分和短周期疲劳特性。
 
Great progress has been made in understanding the chemical and physical interaction of CT and H2S, but little information is available from "real-world" situation in which the pipe has been worked in a variety of job types (e.g., acidizing, gas lifting, and drilling) and in which a large number of other factors may come into play (e.g., injector damage, well-stimulation chemicals, sour inhibitor application techniques, erosion of inhibitors, CO2, and high-chloride water production).
 
虽然在理解连续油管与硫化氢间的物理和化学相互作用方面取得了很大进步,但是对实际作业中油管的各种工作状态(如:酸化,气举,钻井等),以及可能存在的很多其他影响因素(如:注入头损坏,油井增产作业化学添加剂,酸缓蚀剂应用技术,防腐剂,二氧化碳和产出的高含氯化物水等)等却知之甚少。
 
This paper discusses the application of a CT technical specification (based on theoretical and laboratory work) in the operation world. Comparisons will be made between theoretical expectation and practical observation for 70- and 80-grade CTs with regard to low-cycle fatigue, pipe life, and damage in sour environments.
 
本文基于理论和实验工作,讨论了连续油管技术规范在作业中的应用,并针对含酸环境中短周期疲劳、油管寿命和损坏,对比了70级和80级连续油管的理论预期值和实际值。
 

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