海底增压系统的非侵入式监测

J. Abrahamsen, Frank Tore Sæther, S. Haugen, Stian Bentsen, Yngve Villanger, O. Økland
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引用次数: 0

摘要

上层甲板的关键旋转机械由传感器监测,提供机械状况的详细信息。异常的早期迹象可以被发现和纠正。这与海底泵相反,水下泵只对安装基础的很小一部分进行监测。这是由于海底泵缺乏合格的近距离探头,尽管在最近的应用中已经开始解决这个问题。此外,机器内部的传感器增加了复杂性,故障模式和成本,同时由于维修需要将机器恢复到地面,因此收益有限。因此,应用了运行到失败的哲学。由于成本和风险的原因,传感器被忽略了,作业者经常处于一种不舒服的“盲”模式。由于没有关于剩余寿命和缓慢故障风险的信息,唯一的缓解措施是接受备用泵和IMR船的成本,以便在最短的通知时间内准备更换。本文提出的状态监测系统通过一系列传感元件对海底泵产生的声电场进行测量和分析。传感器系统完全独立运行,可以在不干扰泵的情况下安装和更换,还可以监控泵附近的部件。所提供的精度水平不是为详细的维修计划而设计的(例如定义平衡重量的位置),但是它完全足以早期检测正在开发的故障,并将帮助指导操作员通过调整工艺参数来最大限度地延长剩余寿命。通过10年的数据采集,我们将展示该系统如何成功地用于监测两个不同海底泵的健康状态。两台泵最终都损坏了,我们将调查该系统是如何在必须停止泵的6-8周前向操作人员提供警告的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Non-Intrusive Monitoring of Subsea Boosting Systems
Critical rotating machinery topside is monitored by sensors providing detailed information on the mechanical condition. Early signs of abnormalities can be detected and corrected. This is contrary to subsea pumps where only a very small percentage of the installed base is monitored. This is due to the lack of availability of qualified proximity probes for subsea pumps, although this has started to be addressed for recent applications. Furthermore, sensors inside the machine add complexity, failure modes and cost, while benefits are limited as repair requires the machine to be recovered to the surface. Consequently, a run to failure philosophy is applied. With sensors being omitted because of cost and risk, the operator often operates in an uncomfortable "blind" mode. With no information on remaining life time and the risk of a creeping failure underway, the only mitigation is to accept the cost for a spare pump and IMR vessel ready for a replacement at minimum notice. By applying an array of sensing elements, the presented condition monitoring system measures and analyses the acoustic and electric field generated by a subsea pump. The sensor system operates completely independently, can be installed and replaced without interfering with the pump and will also provide monitoring of components adjacent to the pump. The level of precision provided is not designed for detailing a repair plan (e.g. defining the position of balance weights), however it is fully adequate for early detection of a fault under development and will help guide the operator to maximize remaining lifetime by tuning the process parameters. Using data acquired over a 10 year period, we will demonstrate how the system has successfully been used to monitor the health status of two different subsea pumps. Both pumps were eventually damaged, and we will investigate how the system provided the operator with a warning 6-8 weeks before the pump had to be stopped.
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