This method can be applied to heavy oil production in the early period of steam drive, but the time when to stop pumping down lighter oil must be determined.
Optimizing the combination of pumping unit, electrical motor and electric cabinet can raise energy (power) efficiencies for oil Wells.
油井抽油机、电机、电控箱组合配置有利于节能(电能)。
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The utility model has simple structure, good technics, large flow, high oilpumping efficiency and a strong universality, which can be installed and used of the 70cc-250cc types of motorcar engines.
本实用新型结构简单、工艺性好、流量大、泵油效率高、通用性强，70 CC - 250cc型号的摩托车发动机都可安装使用。