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为了寻求经济节能的改善热敏感性原油井筒流动特性的工艺技术,基于两相闭式热虹吸管工作原理,提出了利用热管改善井筒流体温度分布剖面的方法。结合井筒传热模型及耦合热管传热理论建立了热管井井筒温度分布计算理论模型,利用该模型分析论证了热管改善井筒流体温度分布的原理及技术可行性。现场试验及理论研究结果表明:在不消耗额外能量的前提下,利用热管可以实现利用深部流体自身部分能量提高井筒上部流体的温度,进而改善井筒温度分布剖面。
In order to seek the economic and energy-saving process technology to improve the flow characteristics of heat-sensitive crude oil well bore, a method of using heat pipe to improve the temperature distribution profile of wellbore fluid is proposed based on the working principle of two-phase closed thermosyphon. Combined with the wellbore heat transfer model and the coupled heat pipe heat transfer theory, a theoretical model of thermal tube well temperature distribution was established. The model was used to demonstrate the principle and technical feasibility of heat pipe to improve wellbore fluid temperature distribution. Field experiments and theoretical studies show that using the heat pipe can increase the temperature of the fluid in the upper part of the wellbore by using some of the energy of the deep fluid, thus improving the temperature distribution profile of the wellbore without consuming additional energy.