The First Field Test of Permanent Magnet Composite Machine Conducted in Daqing Oil Field

Comparing with the past mobile phones, intellectual mobiles can be used to surf on the Internet, transfer documents, watch TV shows, chat on WeChat and so on. Now you have only one mobile but with all functions. If in the oil production, there is an energy-saving machine with motor of original well, speed reducer, electric control case and belt, this machine would a perfect “fighter” among motors.

Reporters learn from engineering technology team of the third oil extraction plant that they are conducting field test of permanent composite machines used in beam-pumping unit. The test aims to inspect the application effect of the “fighter” applied to oil production. The project is a test project of an oil field company, which is also the first time direct driving permanent magnet composite motor has been used in oil field. So far, 9 wells have been tested by the machine.

"We have transformed 9 pumping units and they work well. In the aspect of test result, the electric-saving rate is 20.8% and system efficiency improves 11.2%.” Liu Hongyu, a main participant says.

As a matter of fact, Daqing Oil Field pays great attention to energy conservation and consumption reduction. It makes effort and tries various energy-saving methods especially in aspect of pumping units. In the third oil plant, there are 3145 pumping units, of which the average system efficiency is 31.94%. Also, the application proportionate of energy-saving pumping units and distribution box is 79% and 92.75%. Energy-saving motor and distribution box have limited potential to further improve system rate of pumping units.

How to further improve the system rate of pumping units? This is a difficult problem for technicians to break through.

"Since 2013, we have conducted many researches and carefully analyze energy consumption point of pumping units. At that moment, we thought that speed reduction box also consumed a lot of energy, but we did not make any effort to this aspect. Just then, direct permanent magnetic composite motor came into our sight. Our team decided to cancel pumping unit and speed reduction box and use direct permanent magnetic composite motor, which further improved the effect of energy conservation.” Liu Hongyu says.

When everything is ready, technicians “perform an operation” on North 2-361-20 Well belonging to the second oil production crew of the third oil plant. They take down motor, speed reduction box, electric control panel, belt and brake and install direct permanent magnetic composite motor.

How’s the application effect of the “fighter” of motor when it first enter into field test? “When this well uses common motor, the day power consumption is 182kWh, but after installation of direct permanent magnetic motor , the day power consumption is only 148kWh. Comparing with common motor, its comprehensive energy-saving rate is 21.1%. It saves 23 Yuan everyday for electric charges and 4400Yuan in a year. It has more obvious energy-saving effect.” Liu Hongyu indicated.

It is understood that after transformation of the pumping units, not only do the oil plant save energy and reduce consumption, but they do not need to change lubricating oil for speed reduction box and belt. Meanwhile, breakdown of pumping units also reduces. The direct driving permanent magnetic motor does not need maintenance, which greatly reduces maintenance cost and workload. This year, they plan to transform 20 pumping unit well and will further inspect the situation after transformation, conclude test result and lay foundation to further promotion.

China Rare Earth Magnet Limited