Electric heating device hollow rod pump well
Hollow rod electric heating technology is a kind of heated oil extraction technology that is suitable for reducing heating viscosity and paraffin removal in the process of lifting crude oil in heavy oil wells, high-temperature oil wells, and paraffin wells in the wellbore. The advanced technology uses the principle of the skin effect, which integrates the current into the ground to cause the wall of the hollow rod to generate thermal energy and heat the oil well through thermal conductivity.
Electric Pump Well Rod Hollow Heating Device
Structure and Composition
The figure shows the electric heating system of the hollow pump rod. It includes variable lock hinges, short-circuit bolts (copper heads), hollow rods, solid cables, mud flaps, hollow polished rods, suspensions (tees), grounding cables, power supplies and other components.
The hollow electric heating system should penetrate the inner hole of the hollow pump rod through the cable and generate thermal energy from the hollow rod wall. Due to the thermal conductivity, the crude oil in the oil pipe is heated throughout the process to increase the temperature of the crude oil in the oil pipe, reduce the viscosity of the crude oil and improve its fluidity, To effectively reduce the production of high viscosity, high freezing point, high paraffin oil.
1. Good corrosion resistance, withstand the corrosion of most chemicals;
2. Good flexibility, can be bent at will and will not be fragile;
3. Good pressure resistance;
4. Easy installation.
Hollow rod electric heater is mainly used for oil wells with "three high" problems in the process of crude oil extraction. According to the actual production situation on site, for early warning of special problems, such as oil wells with difficulty in lifting crude oil, overloading of pumping rods, difficulty in descending, heating of the pump rod load, difficulty in pumping crude oil out of wells, etc. D., it is also advisable to use hollow rods. Electric heating device.
Electric heating cable is a heating method that uses insulation resistance or resistance heating wire to create a temperature after power supply. It can automatically adjust the output temperature and reasonably maintain the process temperature requirements to keep warm, raise the temperature and protect the heating equipment from freezing. The insulation and antifreeze effect of the container is very good.
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.
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.
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.
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 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.
To solve many problems in the "three high levels" crude oil extraction process, the thermal energy generated by the electric heating is used to heat the crude oil in the oil pipe throughout the process to improve the fluidity of the crude oil. Effectively solve various technical problems encountered in the operation of high-condensation, high-viscosity and high-paraffin crude oil, and achieve the goal of improving the productivity and efficiency of oil wells.