中图分类号：TE952 文献标志码：A doi：10.3969/j.issn.1001-3482.2025.04.010

Analysis of Cooling System for Subsea Booster Pump Motor in Offshore Oilfield

AN Weizheng'，WANG Yi² ，MA Qiang1，ZHANG Rende²，DUAN Qingfeng'， DENG Zhuoyuan²，PENGHuafu²，DUQifei² （1.CNOOCResearch InstituteCo.，Ltd.，BeijingOo28，China;2.CoegeofSafetyandOcean Engineering，Cina University of Petroleum（Beijing），Beijing 102249，China）

Abstract： The subsea booster pump is the core component of the subsea booster system， which is widely used in deep-sea oil and gas exploitation，especially in scenarios such as enhanced oil recovery，long distance oil and gas transportation，and deepwater operations in old oilfields. Due to the large water depth， low wellhead fluid pressure，and long return distance，subsea booster pumps are critical to deepwater oil and gas development.The drive motor usually adopts a highly integrated permanent magnet motor. However，due to the narrow internal space of the motor and the difficultyin heat dissipation，the temperature can easily and rapidly rise，which affects the performance and life of the motor.Therefore， motor cooling becomes a critical issue in the design of subsea booster pumps.In this paper，the composition of the motor cooling system of the underwater booster pump was analyzed，and the coling was conducted by means of spacer circulation and external seawater heat exchange.The heat flux coupling of the internal and external cooling pipes of the motor was simulated by numerical methods，and the heating power of the main components of the motor was analyzed.The effects of diferent cooling schemes were evaluated.The results show that the optimized cooling system can effectively reduce the temperature rise of the motor and ensure its stable operation in the deep-sea environment.This study provides a theoretical basis for the design of the motor cooling system of the undersea booster pump and important technical support for the localization of the undersea booster system and the development of deepwater oil and gas in China.

Key words： offshore oilfield; underwater booster pump; cooling pipe; spacer

在全球油气能源发展热点逐渐向深水挺进的背景下，具有克服长距离输油管线和举升带来的压力损失、以及降低水下井口背压而提高原油产量等优点的水下增压技术被广泛应用。水下增压技术的核心是水下增压泵设备，水下增压泵的功率随应用水深增加而不断提升。驱动水下增压泵的电机所产生的热量大幅增加，需要通过隔离液冷却使其温度保持在合理范围内。

对于冷却散热分析，根据热源与温度场之间的耦合模拟方式不同，可分为单向耦合模拟和双向耦合模拟两类。单向耦合模拟是指流体对固体的热影响远大于固体对流体的热影响，固体的温度变化对流体的热状态影响可以忽略，从而通过将固体热损耗以定值形式施加到温度边界条件中[1-9]；而双向耦合模拟可以综合考虑流体和固体在热交换过程中相互影响，但计算方法复杂，对计算资源和算法要求高。

刘畅、李昂等[I0-II]基于有限元软件，通过双向耦合计算了电磁损耗与温度场之间的相互影响。刘美扬[12指出，与温度对铁耗的影响相比，磁场本身的特性对铁耗的影响更加显著。Shin等[13]建议在计算过程中必须综合考虑谐波磁场和旋转磁化等因素，这样才能得到更加准确的铁耗结果。Stig等[14]、MartinLeahy等[15]对换热管道的长度、间距、并列数量及其与海底的高度等参数进行了全面的模拟分析，为海底冷却管路设计提供了理论基础，但其研究中忽略了海水流动对换热性能的影响。……