After more than 50 years of development in Shengli Oilfield, the oil pump jack, as an important equipment of rod pump wells, has mainly experienced three stages of development.
1. In the first stage (before 1980), conventional beam oil pump jack is characterized by simple structure, safety and reliability, and convenient maintenance.
2. In the second stage (1980-2000), conventional beam oil pump jack is the main one, and the non-beam oil pump jack has become a research hotspot.
3. In the third stage (from 2000 to now), conventional beam oil pump jack + non-beam oil pump jack is mainly developed, and the electric reversing oil pump jack is developed.
According to statistics.
There are 14723 beam oil pump jacks used in Shengli Oilfield, accounting for 68.6% of the total number , which is the main type of the oil field;
6122 chain oil pump jacks, accounting for 28.5% of the total, are the second largest type in the oil field; and 613 electric reversing oil pump jacks, accounting for 2.8% of the total, are showing an upward trend year by year.