应用井口高频电加热技术延长冷输油井化清周期

发布时间：2018-08-06 12:44

【摘要】：由于冷输油井采用不掺水集输技术,在集输过程中没有热源提供,管壁会出现不同程度的结蜡现象,影响集输管道的输送能力。针对冷输油井管线结蜡问题,目前主要通过化清车定期高温蒸汽热洗和井口安装电加热器进行管线日常维护。常规高温化清需人工、燃料、热水等消耗,工人劳动量大;传统电加热器需连续加热,功率在5000 k W左右,耗电量巨大。为解决上述问题,研发了新型井口高频电加热装置。此装置整合了传统电加热器和电磁防蜡器,并通过超导体将工频交流电转换为1~100 k Hz的高中频交流电;应用电磁感应原理,通过电感线圈将电能转换成相同频率的交变磁场,并利用涡流效应,借助金属本身的电子摩擦发热,将电能转换为热能,实现低能耗自动控温。高频电加热器平均每天运行15.2 h,日耗电380 k Wh,年消耗电费8.7万元,大大降低了冷输油井干线清防蜡成本。
[Abstract]:Because the cold oil well adopts unadulterated water gathering and transportation technology, there is no heat source in the gathering and transportation process, and the waxing phenomenon will appear in different degree on the pipe wall, which will affect the transportation capacity of the gathering and transportation pipeline. In order to solve the problem of wax deposit in cold oil well pipeline, the routine maintenance of pipeline is mainly carried out by chemical cleaning and regular high temperature steam hot washing and installation of electric heater at well head. The conventional high temperature heating requires labor, fuel and hot water consumption, and the traditional electric heater needs continuous heating, the power is about 5000 kW, and the power consumption is huge. In order to solve the above problems, a new type of high-frequency electric heating device for wellhead is developed. This device integrates the traditional electric heater and electromagnetic wax preventer, and converts the power frequency alternating current to the medium and high frequency alternating current of 1 ~ 100kHz by superconductor, and converts the electric energy into an alternating magnetic field of the same frequency by the inductance coil using the principle of electromagnetic induction. By using the eddy current effect and the electronic friction heating of metal, the electric energy can be converted into heat energy to realize the automatic temperature control of low energy consumption. The high frequency electric heater runs 15.2 hours a day, consumes 380kWha of electricity a day, and consumes 87000 yuan of electricity per year, which greatly reduces the cost of wax cleaning and prevention in the main lines of cold transportation wells.
【作者单位】：大庆油田有限责任公司第七采油厂;大庆油田有限责任公司第四采油厂;
【分类号】：TE977

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