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.
分析认为，蒸气驱采油井生产初期也可采用泵下掺稳油的生产方式来维持正常生产，但应确定停止掺稀油的时机，并论述了其原则和方法。
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)。
The utility model has simple structure, good technics, large flow, high oil pumping 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，70CC- 250cc型号的摩托车发动机都可安装使用。
The shear ram valve not only can shear wire ropes, but also can close a well mouth, thereby largely satisfying the safety of pumping operation in an oil filed.
本实用新型既能剪切钢缆又能封闭井口的装置，极大地满足了油田捞油作业的安全。
The shear ram valve not only can shear wire ropes, but also can close a well mouth, thereby largely satisfying the safety of pumping operation in an oil filed.
本实用新型既能剪切钢缆又能封闭井口的装置，极大地满足了油田捞油作业的安全。
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