Recently, Jianghan Petroleum Machinery Factory and China University of Petroleum (East China) Institute of Mechanical and Electrical Engineering, headed by Dr. Xiao Wensheng, jointly undertaken the completed national “10th Five-Year Plan†major equipment technology research plan--"Localized petroleum new equipment, new the development and application of technology "issue of" development and application of linear motor pumping unit "special, a few days ago in Beijing by a special group of experts commissioned by the Ministry of Science and acceptance of the organization.
The acceptance expert group believes that the linear motor is applied to the pumping unit, and the motor mover directly drives the reciprocating motion of the sucker rod by linear motion, which greatly improves the system efficiency of the whole machine, which is significantly higher than other conventional models, and the productivity effect is remarkable. For the first time, the project developed a high-power low-speed permanent magnet synchronous linear motor pumping unit, which is of great significance to the development of oil production equipment.
Linear motor is a kind of transmission device that directly converts electric energy into linear motion mechanical energy without any intermediate conversion mechanism. It has obvious advantages such as simple structure, reliable operation, high transmission efficiency, low mechanical loss, low noise and good environmental adaptability. Linear motors have been widely used in industrial, civil, military and other linear motion applications.
The linear motor pumping unit developed by scientific researchers has a maximum load of 200 kN, a motor thrust of 50 kN, and a maximum stroke of 8 m. As long as other process equipments are matched, the stroke length can catch up with 24.4 meters in the United States. The biggest feature of the linear motor pumping unit is that it has changed the energy conversion mode in which various pumping units were first converted into electric motion and then mechanically converted into linear reciprocating motion, which overcomes the mechanical inefficiency of the pumping unit in the past. The weakness. The linear motor pumping unit directly converts electric energy into linear reciprocating motion, which not only improves the efficiency, but also realizes the stepless adjustment of the pumping parameters, and can adjust the law of the suspension point according to the oil production needs, thus creating a good condition for the intelligence; Effectively reduce the starting load, reduce the weight of the model, and overcome the phenomenon of "large horse-drawn car". The successful development of the linear motor pumping unit is, in a certain sense, a revolution in the structural mechanism of the pumping unit.
Linear motor pumping unit has the job easy, simple machine structure, low starting current, high stable operation, small footprint, low noise, low operation and maintenance costs, good energy-saving (energy-saving 47.47% than the old pumping unit), the trajectory Reasonable and other advantages. The pumping unit also has four sports modes of “slow up and downâ€, “slow down and fastâ€, “up and down speed†and “sudden pumping during commutationâ€.
The linear motor pumping unit cancels the reduction gear, the transmission device and the movement type conversion device of the beam pumping unit. The motor mover through the linear motion drives the sucker rod to reciprocate through the sky wheel, and the energy saving effect can reach 45%. The cost of oil field exploitation will be greatly reduced, and the manufacturing cost of the pumping unit will be greatly reduced. Compared with the conventional beam pumping unit, the linear motor pumping unit can save electricity and maintenance costs by 32,000 yuan per year, and has good economic and social benefits.
At present, the technology has obtained three patents. Using this technology, the first prototype of the linear motor pumping unit was produced in May 2004 and the operation test was carried out in the factory. In October 2004, it was moved to the Huayou Oilfield No. 1 Oil Plant for field test. So far, the operation has been good. In March 2005, a second ZXCY20-8 linear motor oil machine was produced. After a strict in-plant type test, it was moved to Wang 9-4, Jianghan Oil Production Plant of Jianghan Oilfield on April 29, 2005 for field test, and the operation was in good condition.
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