Effect of hollow rod electric heating system on heavy oil production
Published on:
2023-05-30 09:53
Due to the high content of asphalt colloid and low paraffin content, heavy oil has high viscosity and difficult fluidity, so it is very difficult to extract.
To solve many problems in the "three tops" crude oil extraction process, such as: difficulty lifting crude oil, heavy load on the pumping rod, difficulty of descent and increased load on the pumping unit, the hollow pump rod electric heating device was successfully developed. Thermal energy generated by electric heating is used to heat crude oil in an oil pipeline throughout the process to improve the fluidity of 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.
The electric heating equipment and the electric heater for the rod heating cable have all the above advantages of constant power and the effective effect of chemical regeneration of thermal oil, and at the same time overcome the above existing problems. At present, these are the advanced technological means in the world, and the effect is very perfect. It has been successfully applied in Shengli, Henan, Huabei and other oil fields and has yielded good results.
The electric heating hollow pumping rod according to this principle consists of adjustable joints, terminators, hollow pumping rods, solid cables, sensors, hollow polished rods, suspensions and other components. Together with the blowout box, primary cable, electrical control cabinet and other components, it forms an electric heating rod.
The hollow rod electric heating system shall penetrate the inner hole of the hollow rod and form a loop with the hollow rod body, pass the alternating current of different frequencies through itself, use the inner shell effect to generate thermal energy on the hollow rod wall, and heat the inner part of the oil pipe by thermal conductivity The crude oil is heated everywhere, To increase the temperature of the crude oil in the pipe, reduce the viscosity of the crude oil and improve its fluidity, so as to effectively produce high-viscous, high-temperature, high-paraffinic oil. When the inner cable of the hollow pump rod is powered by alternating current, an internal skin effect is created, the current flows down the inner wall of the hollow rod, and the outer wall is basically without current, which can be viewed as an insulator. To ensure labor safety.
When the inner cable of the hollow pump rod is powered by alternating current, an internal skin effect is created, the current flows down the inner wall of the hollow rod, and the outer wall has basically no current, which can be thought of as an insulator. To ensure labor safety.
The hollow tubing rod is the main element of electrothermal conversion, and the heat of electrothermal conversion is directly transferred to the crude oil. The electrothermal conversion efficiency is relatively high, the thermal conductivity efficiency is high, the effect is obvious, and the use effect is relatively good. It can increase temperature and reduce viscosity without large heating power. Paraffin removal and cork removal. Judging by the effect of the occasional use of the Dagan oil field, Compared with industrial frequency heating, the energy saving effect is obvious, and energy saving can reach more than 30%.
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