Shandong Huaning Electric Heating Technology Co., Ltd.
Heating options for underwater heavy oil pipelines
Due to heat loss in the transportation of subsea pipelines, it is difficult to achieve the ideal temperature maintenance effect through simple passive insulation. Active heating is designed to compensate for the heat loss of the subsea pipeline through external heat so that a certain subsea pipeline temperature can be maintained. In real design, passive insulation technology is usually combined with active heating technology to achieve the best temperature maintenance effect.
Jan 31,2023
Decrease in the temperature of crude oil when transported via subsea pipeline often results in increased viscosity, hydration, and paraffin deposition. This will directly affect the efficient transportation of offshore oil and gas and even lead to the blocking of pipelines. In severe cases, this will lead to the abandonment of underwater pipelines. This phenomenon is more evident in the development of heavy oil in the sea. In order to meet the temperature requirements of crude oil in subsea pipelines during production operations and downtime, it is generally necessary to take appropriate temperature maintenance measures for subsea pipelines.
Due to heat loss in the transportation of subsea pipelines, it is difficult to achieve the ideal temperature maintenance effect through simple passive insulation. Active heating is designed to compensate for the heat loss of the subsea pipeline through external heat so that a certain subsea pipeline temperature can be maintained. In real design, passive insulation technology is usually combined with active heating technology to achieve the best temperature maintenance effect.
Underwater pipeline heating technology is divided into thermal liquid heating and electric heating according to different heating sources. Electric heating is divided into direct electric heating and indirect electric heating. An offshore oil field in the Bohaya Sea region finally chose electric heating technology after a comprehensive comparison.
Direct electric heating has low electrical efficiency, requires special anti-corrosion design, requires regular inspection and maintenance. Currently, most direct electric heating pipes are designed for short-term use, less often for long-term use.
The heating efficiency of the heating medium is low, and the corrosion problem caused by the heating medium entering the heater pipe must be taken into account. However, with sufficient residual heat on the platform, heating with thermal liquid has certain advantages.
The temperature gradient of electric heating is small, the thermal stability time is long, the required electric power is small, and it is suitable for long-term use. Electric heating has a wide range of applications, high thermal efficiency, energy saving, no environmental pollution and long service life. The advantages of remote control and automatic control are the development direction of electric heating technology.
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Which electric heating should be chosen for the main pipeline transport of heavy oil
Transport of heavy oil through the pipeline over long distances and long-term retention in the pipeline will result in a drop in temperature due to heat dissipation and increased viscosity, which will cause the pipeline to be blocked by freezing or condensation-related accidents. Electric heating is widely used as effective insulation of pipelines and anti-freeze protection.
Which electric heating cable should be considered for a 4 km pipeline
According to the statistics of the Hydrometeorological Center, the average daily minimum temperature at the location of the CNPC tank farm is 5 ° C, and the average daily maximum temperature is 14 ° C. Since the freezing point of the PX is about 15 °C, the supply pipeline needs heat preservation and heating. The oil depot has been in operation for many years without a stable source of steam, therefore, this project is considering the use of electric heating technology.
Application of outdoor electric heating cable in oil main pipelines with high paraffin content
Long-distance crude oil pipelines with a high paraffin content with freezing temperatures above 50 °C. According to the requirements of the production plan of the plant, the volume of oil transportation through the pipeline is 150 thousand rubles. Tons per year, maximum-200 thousand. Tons per year.. According to the thermodynamic analysis of the pipeline, the initial supply temperature of the pipeline is 80 ° C (TN), and the temperature of the end entering the tank is 60 ° C (Tu). Since the transportation temperature needs to be adjusted according to the time of year, it sometimes needs to be transported by heat.
What heating product to choose for main infusion pipelines
In petrochemical engineering, trunk infusion pipelines are the lifeblood of the factories. The temperature in the northern region is too low in winter and the pipeline needs to be insulated to compensate for the heat loss due to the low temperature in winter to ensure the normal operation of the pipeline.
The role of leather tracer cables in the insulation of asphalt main pipelines
The toughness of the asphalt is greatly affected by the temperature. When the temperature decreases, the toughness of the asphalt increases, and the drop in resistance of the asphalt during pipeline transportation increases; when the temperature falls below the freezing point, the asphalt solidifies, causing the pipeline to clog and the conveyor belt to come to trouble. Therefore, electric heating and heat preservation during the transportation of asphalt are very important.
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